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1. Tel 09328 62671 Circle No 32 on Reader Enquiry Card Series 9140 pH Redox meters are described as having potential applications whenever there is a need for a panel mounting instrument to provide continuous analysis control of industrial liquids The most likely applications include brewing chemical manufacture dairying effluent treatment food and drink processing metal finishing and plating paper and board manufacture Kent Industrial Measurements U K Cea eee eee er eer eee ee a a I I A I a TT SE IS TT I TO GE SOT TT EE CD TE TT NET ET IT EAE AE 2202. measurement of moisture in solid sam ples It incorporates a high speed blend ing system which homogenizes the sample first then an automatic Karl Fischer titration takes place The blend ing can be timed from 0 to 15 min coping with almost any kind of sample which normally has to be manually ground For further information contact Baird amp Tatlock PO Box 1 Romford RM1 1HA UK Tel 01 590 7700 Circle No 12 on Reader Enquiry Card Product news Honeywell Control Systems have launched a new family of British made and designed oscillographrecorders The smallest unit is a portable 10 channel instrument for field or laboratory use and at the top of the range is a 30 cm chart width instrument with up to 30 channels and a very wide chart speed range which should meet the exacting requirements of laboratory engineers and technicians in providing high quality hard copy records A unique feature of the range is the wide selection of on board signal conditioning modules which give unprecedented flexibility for matching directly to almost any type of signal source Included are modules to interface directly with virtually any transducer active filters transient capture and alphanumeric printing with keypad or remote entry facilities Contact Honeywell Control Systems Ltd at Charles Square Bracknell Berkshire RG12 1FB UK for more information Circle No 13 on Reader Enquiry Card Mettler DL 40 Several applications of the Me
3. 7 for the Philips P 851 computer with fixed and flexible disc storage and Cespec 8 for the HP 9825 desk top computer Software functions include spectrometer control result calculation calibration and inter element correction by regression and tolerance checks of analyses and material compositions Details from Pye Unicam Ltd York Street Cambridge CBI 2PX UK Tel 0223 358866 Circle No 17 on Reader Enquiry Card Flexibility reliability economy SRA 2000 The SRA 2000 system is now ready for delivery It is built around two analytical subsystems a Technicon SMAC II and a Technicon RA 1000 linked by a common computer command module Technicon claim the following advantages for their new product efficient sample and data handling efficient and cost effective reagent usage 216 efficient sample utilization discretionary analysis and reporting in built analytical support simple handling of paediatrics in built quality control procedure composite result reporting flexible data storage and retrieval Details from Technicon Instruments Company Ltd Evans House Hamilton Close Basingstoke Hampshire RG21 2YE UK Tel 0256 29181 Circle No 18 on Reader Enquiry Card PRTs The 6800 and 6900 platinum resistance thermometers incorporate Comark Electronics proven microprocessor controlled A D system auto zeroing auto calibrating and exceptional scale length They are described as accurate sta
4. 8096 We now offer the IBM PC as an option We are 217 Product news ADaM Productivity can be increased at least five times by for example fast and accurate peaking on the exact wavelength using CRT display simultaneous 20 channel dynamic background correction 20 profiled channels instantly available for any sample fewer dilutions required because the electronic dynamic range is increased 200X easy retrieval of profiles and calculated data Results are better because ADaM s advanced electronics make full use of the SpectraSpan optics Operation is user oriented Interface Design Inc 6116 Skyline Drive Suite 106 Houston Texas 77057 USA tel 713 783 3607 evaluating others and may offer another option before the end of this year Another important feature is the access to the software we give the cus tomer Regardless of how thorough we are we cannot possibly design the soft ware to meet all laboratory needs With the ADaM the chemist can customize the programming to the extent of his pro gramming ability or resources to fit his own needs Of course not all analytical instru ments are as complex as a spectrometer but the concept is the same a versatile interactive intelligent interface More ex pensive initially perhaps but much more cost effective in both the short and long term Our increased productivity claim of five to 10 times is not a casual advertisting statement We now offer other options incl
5. Beaconsfield Buckinghamshire HP9 1QA UK Tel 04946 6161 Circle No 4 on Reader Enquiry Card 24h solvent alarm A monitor to warn of the potentially dangerous build up of industrial and commercial solvent vapour is being marketed in the UK by Detectawl Gastec of Milton Keynes The mains operated Gaztell equipment manu factured by Autoclimate of Birmingham will detect vapours from all the chlorinated and fluorinated solvents used as degreasers and dry cleaning agents for example perchloroethylene 111 trichl oroethane and trichlorotrifluoroethane The wall mounted Gaztell which is about the size of a telephone samples the atmosphere every 2min Dual flashing lights and an alarm operate when the vapour concentration exceeds a pre set threshold If the master sensing unit is located in a normally unoccupied area it can be linked to a remote alarm also operated from mains electricity with identical visual and audible warnings The power supply is 240V 110V 50 60Hz Detectawl Gastec is at Unit 61 Garamonde Drive Wymbush Milton Keynes MK8 8DE UK Tel 0908 568076 Circle No 5 on Reader Enquiry Card 213 Product news Auto injector luminescence system In luminescent assays rapid and thorough mixing of reagents such as luciferase or luminol with the sample is critical to achieving low variability Turner Designs motorized auto injector system for luminometers has reduced CVs to 1
6. brochure which is available from the UK distributor Dorand Electronics Requests to Dorand Electronics Ltd Allens Lane Hamworthy Poole Dorset BH16 5DA UK Tel 0202 622006 Enquiries outside the UK to SNG NERMAG 49 Quai du Halage 92500 Reuil Paris France Circle No 22 on Reader Enquiry Card Electronic counter Rather that simply counting input pulses a Trumeter counter can be programmed on site to convert pulses into units of measurement Four external thumbwheel switches on the recently launched unit allow a four figure multiplication factor to be programmed in the counter display is then the product of the input pulses and the multiplication factor The multiplication factor is deter mined simply by a trial run for example comparing the previously measured length of a piece of continuous sheet material to the number of pulses pro duced by a transducer attached to the production machine roller Where con tinuously produced materials are then cut into units a multiplication factor could be programmed to enable the counter to display the number of separate sheets Other applications include compensation for known errors or deviations metric Imperial conversions etc This new Trumeter counter is their Progammmable Add and Subtract Counter which will count up or down and is coded LCD4 Xn It has a four digit 12mm high LCD display a count speed of up to 500 s and a DIN sized panel mounting case Rear scr
7. injected directly into the injection valve reducing sample loss and band broadening to a minimum The syringe is automatically washed before drawing a sample Ten injection programs with up to 100 sequences can be stored in permanent memory for future use More information from Varex Corporation 12221 Parklawn Drive Rockville Maryland 20852 USA Tel 301 984 7760 Circle No 20 on Reader Enquiry Card Emission spectrometer The ICP 6000 system is a high perform ance inductively coupled plasma emis sion spectrometer It is described by Perkin Elmer as offering high speed pre cision flexibility and operating simplicity for multi element trace metal analysis Controlled by a new laboratory computer and dedicated ICP software the system is capable of analysing samples sequentially at a rate of more than 20 elements min Product news The spectrometer was designed to handle the widest possible range of sample matrices Each element is ana lysed under optimum spectral conditions a dual grating monochromator ensures high resolution over the entire wave length range 175 900 nm each grating is used only in the first order for high energy throughput and computer control of wavelength selection ensures accurate and stable calibration Furthermore the optical system can be purged with an inert gas so analyses in the far UV region can be performed The complete sample introduction assembly is extremely resistant to
8. the PRT mode A three range analogue output is provided The PRT section of these instruments is characterized to DIN 43760 1980 thermocouples should be constructed of materials to BS 4937 The instruments are housed in com pact and robust cabinets which incor porate integral carrying handles that double as tilt stands They measure 254 x 325mm the longest dimension being with the handle in the extended position Supply voltage requirements are either 110 V or 220 V Comprehensive leaflets including full speci fications are available from Comark Electronics Ltd Rustington Little hampton West Sussex BN16 3QZ UK Tel 09062 71911 Circle No 19 on Reader Enquiry Card Interfaces sampler The Varex Corporation of Rockville USA recently launched two interfaces and an automatic sampling system One interface the Simple is designed for fast data acquisition with microcomputers the other the Universal can acquire digitize and store data from most analytical instruments and can be easily connected to the majority of computers Varex s Automatic Sampling System is under microprocessor control and gives virtually contamination free injections of samples Up to 90 samples can be injected in any selected sequence at any volume for any number of times It can be pro grammed to mix different volumes of different samples for the same injection and rinse the sampling valve between injections Samples are
9. with non isolated current output The 9142 model has the same features plus two on off control alarm points The next model the 9143 has in addition an isolated current output On the most sophisticated model in the range the 9144 one of the control alarm _ RESET CHECK SET A MARK SPACE L SLOPE SET B _PH METER points is fitted with a mark space control function to facilitate the monitoring or continuous dosing systems with long time constants All instruments are housed ina DIN standard case measuring 96 x 96 x 160mm and share the same 0 14 pH or 0 to 1999mV range 0 01 pH dis crimination and stability of better than 0 02 pH in 24h at constant temperature They all incorporate temperature com pensation over a range of 0 100 C This can be automatic with a Pt100 tempera ture compensator installed in the elec trode system or fixed at 10 intervals by placing a fixed resistor of the appropriate value in the temperature compensation circuit Various current output ranges are available giving 0 10mA 0 20mA or 4 20 mA in isolated or non isolated ver sions The output current can be ex panded to cover a pH span down to 5 pH pre set anywhere in the range 0 14 pH High and low alarms with either normal or failsafe operation are set by means of screwdriver operated controls on the front panel of the instrument More information from Kent Industrial Measurements Ltd Hanworth Lane Chertsey Kent KT16 9LF UK
10. 0 01 NTUs on the 0 99 99 NTU range and to 0 1 on the 0 999 range stray light is under 0 03 NTUs No volume measurement is required and a sample is approximately 20ml it has standard recorder outputs Accessories are available including a continuous flow attachment The nephe lometer comes complete with operating and service manual three sample cells two spare fuses and one spare lamp More information from Tekmar Company PO Box 371856 Cincinnati Ohio 45222 USA Circle No 31 on Reader Enquiry Card Industrial pH Redox meter A range oflow cost pH Redox meters has been announced by Kent Industrial Measurements Ltd The meters are de signed for continuous measurement of pH levels in industrial liquids With a digital display and a choice of several control alarm and output options the panel mounting Kent EIL 9140 Series instruments are suitable for on line appli cations in a number of industries They can be connected to chart recorders controllers data loggers or computerized control systems and can be used to provide two or three step automatic pH control using one or two reagents to adjust the acidity or alkalinity of the test liquid A variety of dip and flow type elec trodes electrode cleaning systems and control valves is available enabling com plete pH Redox measurement and con trol schemes to be implemented There are four models The basic model the 9141 gives pH indication only and is equipped
11. Journal of Automatic Chemistry Volume 5 Number 4 October December 1983 pages 213 220 Product News The Model 2400 Identafacer System a data entry terminal for clinical labora tories The 2400 automatically provides test result tagging for a variety of scales counters measuring devices and analysers it accepts serial parallel and analogue inputs in ASCII BCD or Binary data stream formats Full information from EDMAC Corporation 7500 Main Street PO Box 750 Fishers New York 14453 USA tel 716 924 4000 Circle No 1 on Reader Enquiry Card UV vis spectrophotometer The new double beam DMS 100 UV visible spectrophotometer offers a number of advanced features together with a flexible repertoire of visual displays via a video monitor Spectra can be drawn in real time and simultaneously stored in memory they can then be reformatted on the screen viewed in a different photo metric mode or overlaid for additional clarity such as combining the absorbance and second derivative scans The operator can zoom in on an area of interest expand the amplitude of the trace or change the photometric scale by varying both ex pansion and offset The results of any of this work can be fed to a video printer and or a digital printer plotter Varian s DMS 100 also includes a Safe Memory option which stores methods for quick start ups This module stores 15 complete set ups including keyboard status parameter val
12. ation of clinical and quality control luminescence applications A news sheet from Turner Designs describes an auto injector system for consistent repeat injections a continu ous flow cuvette and a three reagent injector tube assembly Also shown are data reduction systems involving a computer interface Copies from Techmation Ltd 58 Edgware Way Edgware Middlesex HA8 8JP UK Tel 01 958 3111 Circle No 8 on Reader Enquiry Card 214 The Model 20 031 injector system which can be adapted to the existing Turner Lh photometer The exclusive British Isles distributor is Techmation Ltd Chlorophyll in vivo and in situ Accessory kits from Techmation Ltd convert the Turner Field Fluorometer into a portable chlorophyll measuring instrument capable of detection down to five parts per billion The Model 10 fluorometer can be used on land or froma boat Algae phytoplankton diatoms etc can be measured directly on site without chemical extraction procedures The water is pumped through the field fluorometer and data can then be read or recorded continuously The fluorometer can also be used for oil in water and water flow measure ments using fluorescent dyes An illustrated brochure is available from Techmation Ltd 58 Edgware Way Edgware Middlesex HA8 8JP Tel 01 958 3111 Circle No 9 on Reader Enquiry Card Science Exchange Service The Walton based Science Exchange Service buys and sells a ran
13. ble versatile easy to operate and com petitively priced The 6800 will accept DIN plug inputs from up to five A or B type PRT probes any one of which can be selected by a rotary switch on the front panel to give a read out on the 14mm LED display Push button selected scales allow the display to be shown in degrees absolute Celsius or Fahrenheit and directly in Ohms The range of the Model 6800 is from 200 Celsius up to 700 Celsius at an overall accuracy of 0 1 Celsius and resolution down to 0 01 of a degree An array of push buttons on the front panel controls all functions and modes and allows the entry of high low alarm limits and refinements such as a factor to scale and offset the readings The alarms also provide an output for control purposes Parallel BCD or two range analogue out puts are provided The 6900 accepts inputs from either one A or B type PRT probe or one thermocouple Of the latter types K J T R or S can be accommodated being selected by using the front panel push buttons these controls also allow the entry of alarms and factors as in the 6800 The LED will display in degrees absolute Celsius or Fahrenheit microvolts or Ohms Depending upon the type of ther mocouple in use the range of the 6900 is from 200 Celsius up to 1760 Celsius and on the microvolts scale from 10 to 75 millivolts Resolution is to 0 1 of a degree in the thermocouple mode and 0 1 0 01 of a degree for
14. cor rosion so that the system can be used to aspirate any laboratory acid as well as high levels of dissolved solids The cross flow nebulizer and spray chamber are designed to give high analytical precision without adjustment The plasma torch is demountable for low running costs and easy maintenance with a choice of quartz or alumina sample aerosol tubes The software is resident on the hard disc of the computer At the start of an analysis the operator simply types ICP and is then guided by prompts Soft keys simplify parameter entry for method development and up to 108 individual element files can be stored in a single method file High resolution colour graphics allow the analyst to easily evaluate and compare spectra since blanks standards and samples are displayed and printed in their own designated colours Each of the seven modes of operation is colour coded The data generated during an analysis are Stored automatically on hard disc and can be reported in a chosen format as hard copy or transmitted to a floppy disc or data bank for archiving When the ICP 6000 is not in use the computer can be used as a stand alone unit Contact Perkin Elmer Ltd Post Office Lane Beaconsfield Buckinghamshire HP9 1QA UK tel 04946 6161 for more information Circle No 21 on Reader Enquiry Card Gas chromatographs mass spectrometers The NERMAG gas chromatographs mass spectrometers and accessories are discussed in a
15. entional drying ovens Full information from Dynatech Lab oratories Ltd Daux Road Billingshurst Sussex RH14 9SJ UK Tel 040381 3381 Circle No 15 on Reader Enquiry Card Laboratory Impex There is now an intelligent printer available for Laboratory Impex s CCVI modular haematology system The prin ter can calculate MCH and MCHC it converses with the CCVI through a 16 position keyboard All calculated and measured parameters are printed out on standard 40 column printer paper Results from up to 100 patients can be memorized and then displayed in one of three formats print out during oper ation print out in a condensed form as a daily report or a complete haematology profile of each patient with date identifi cation number and ward The CCVI printer is simple to operate Further details are available from Laboratory Impex Ltd Lion Road Twickenham Middlesex TW1 4JF UK Tel 01 891 4881 Cell sorting Laboratory Impex is marketing the Becton Dickinson cell sorters and ana lysers in the UK Current applications of the FACS series include routine immuno fluorescence cell cycle analysis and cell type differentiation Circle No 16 on Reader Enquiry Card PV 8350 extras A series of new features has been an nounced for Philips s modular PV 8350 vacuum spectrometer system For ex ample the spectrometer optics can now include certain analytical lines at longer wavelengths than the normal
16. ew connections are provided for 12 V d c supply input devices and external resetting Either elec tronic or contact closure input devices may be used The counter has an internal rechargeable battery back up of 1000h Technical literature is available from Trumeter Company Ltd Radcliffe Manchester M26 9NX UK Tel 061 724 6311 Circle No 23 on Reader Enquiry Card U V Ultra violet units with a large exposure area have tended to be expensive Decon Laboratories have launched a unit with an exposure area of 45 x 24cm which is priced at 97 00 The light source is four 15W actinic blue fluorescent tubes backed up by a highly effective reflector and controlled by a 6min electromech anical timer This is housed in a cabinet which has a foam pad attached to its spring loaded lid to ensure even distri bution of pressure over the glass plate To complement this unit Decon Laboratories are also offering a range of spray coated photo sensitive copper boards These are available in four stan dard sizes as single sided or double sided with fibre glass or pertinax bases The developer for these boards is granular and is packed in small sachets which make up a 0 51 solution Details from Decon Laboratories Ltd Conway Street Hove Sussex BN3 3LY UK Tel 0273 739241 Circle No 24 on Reader Enquiry Card Change of address Busch UK Ltd suppliers of vacuum pumps and compressors have moved to Vulcan Way New Addingto
17. ge of instru ments for research and routine labora tories The idea is simply that original owners can get rid of unwanted machines the sale gives them funds for new purchases and second hand equip ment is available to scientists who cannot afford new instruments The Service handles over 80 types of machine to full manufacturer s specification and with a warranty amino acid analysers UV monitors gas chromatographs and so on Details from the Science Exchange Service at Rutherford House 43 Terrace Road Walton on Thames Surrey KT12 2SP UK Circle No 10 on Reader Enquiry Card Instruments for clinical chemistry labs Beckman has put together a folder on stat or emergency uses for eight of their instruments The folder covers machines for use during night calls as back ups to a main analyser and those which will cope with early morning or out of run samples Each instrument is described with an illustrated information sheet Beckman list the Model 42 clinical chemistry system glucose blood urea and creatinine stat analysers analysers for electrolyte determination and their Airfuge ultracentrifuge and Microfuge centrifuge Folders are available from Beckman RIIC Ltd Progress Road Sands Industrial Estate High Wycombe Buckinghamshire UK Tel 0494 41181 Circle No 11 on Reader Enquiry Card Moisture determination Baird amp Tatlock are now offering a unique instrument for fast and accurate
18. limit of the spectrometer with the standard 2160 line mm grating besides covering the range 177 to 410nm at a dispersion of 0 46 nm mm in the first order the lines Na 215 Product news 5889nm and Li 6103nm can be measured in the first order Exit slits for these lines are mounted on the Rowland circle on the opposite side of the entrance slit to the normal exit slit block Compromises associated with expanding the wavelength range by measuring lines in higher orders of the grating are thus avoided For metal analysis a new 50Hz source PV 8560 combines the advan tages of monoalternance excitation with computer controlled high energy pre burn for installations where the high speed of the Philips PV 8530 500Hz source is not required By localizing pre melting the pre burn minimizes problems caused by sample inhomogeneity For systems which include an induc tively coupled plasma source unit a large number of accessories are now available for instance automatic background correction and a choice of automatic systems for handling batches of solutions dilution of samples or measurement by multi element standard additions Advanced interface electronics extend the dynamic range of measurement to 300 000 1 this is particularly valuable in ICP analyses and also allows full ad vantage to be taken of the measurement capabilities of lines used for spark analyses Two comprehensive software pack ages are offered Cespec
19. n Croydon Surrey CRO 9UG UK Circle No 25 on Reader Enquiry Card Analytical Data Manager Letter from Alan Gow President and CEO Interface Design Inc to Peter Stockwell Ed Enclosed is some information on our new computer based spectrometer control system It was introduced at the Pittsburgh Conference hopefully you can use it in your Product News Section Ironically our Analytical Data Manager ADaM addresses a number ofthe issues you raised in your editorial in Journal of Automatic Chemistry s January March 1983 issue Until our ADaM was available all prior attempts to automate the Beckman SpectraMetrics Beckman Spectra Metrics Inc 204 Andover Street Andover Massachusetts 01810 USA spectraspan have been with passive microcomputers First with the Tektronix 4052 and then with their own DataSpan both in the passive mode just handling the data The ADaM takes a different approach one we believe will become the dominant method We have developed an inter active interface between the spectrometer and microcomputer The interface in cludes its own microprocessor RAM and I O capabilities and controls the acquis ition of raw data as well as the micro computer and peripherals Thus the specific microcomputer that is used becomes less important In fact the system can be adapted to use the latest microcomputer available and avoid be coming obsolete The initial ADaM in cluded the Commodore
20. or less determined with ATP standards The injector volume can be adjusted from 50 to 500 ul and optional syringes permit volumes of 25 ul or less The typical injection speed is less than 0 5 s up to three different reagents can be injected into one cuvette With a count time of 15 s more than 100 samples can be processed per hour Details from Techmation Ltd 58 Edgware Way Edgware Middlesex HA8 8JP UK Tel 01 958 3111 Circle No 6 on Reader Enquiry Card Vacuum heating technology Following demands for improved per formance by users of vacuum ovens Faircrest Engineering Ltd has developed a method of internal electric heating which overcomes the problem of corona discharge The new technology which should be of interest to those using vacuum equipment is being used by the company for all their deliveries of heated vacuum chambers and replaces the commonly used and complex methods of superheated steam hot oil or external heating Temperatures range from ambient to 700 C and vacuum from atmospheric to 107 torr Further details from F aircrest Engineering Ltd 4 Union Road Croydon Surrey CRO 2X X UK Tel 01 684 1422 Circle No 7 on Reader Enquiry Card Luminometry automation New modular developments have been announced by Techmation in Turner Designs Model 20 photometer lumino meter systems All of the systems are designed to be compatible with existing components for increased versatility and autom
21. s flow and oven heating are switched off can be set by the operator The main parts in the safety system the detector the sampling pump and the electromagnetic valve are con tinuously checked for faults by an electronic circuit Further information from Chrompack Nederland B V PO Box 3 4300 AA Middelburg The Netherlands Tel 01180 11251 Circle No 27 on Reader Enquiry Card Chrompack s Hydrogen Safety System which is described as making working with hydrogen as safe as with common carrier gases Product news Ly yy Linseis s L8500 Data Acquisition System It will accept one to six signals and consists of a basic housing plus plug in modules the measuring input modules from the company s upright recorder series L2005 Signals are taken up by the modules standardized digitized and passed to the computer via an interface V24 or an IEC bus Before the L8500 one digital instrument had to be used for each signal To adapt the instrument to different signals it is not necessary to buy a new digital instrument rather all that is needed is a new input module Full explanation from Linseis GmbH Werk Selb Vielitzer Strasse 43 D 8672 Selb FR Germany Circle No 28 on Reader Enquiry Card Thermal data A cost efficient approach to thermal analysis Mettler s FP800 Thermosystem consists of a central control unit and five different measuring cells The system will supply all the data needed for thermal analy
22. sis melting boiling and clouding temperatures and dropping and soften ing points The system also enables the heat of transformation to be determined and samples can be investigated under thermal microscopy conditions The measuring cells of the FP800 offer the user several system design options it is not necessary to buy all the modules at once so a thermal analysis system can be put together as needs dictate Peripheral instruments such as a printer a recorder and a computer can all be connected the necessary data interfaces are built into the control unit To operate the FP800 the user simply proceeds by following a dialogue with the control unit this can be done in English French German Italian or Spanish Details from Mettler Instrumente AG CH 8606 Greifensee Switzerland Thermal analysis has now become es sential in production and quality con trol also in research and development Mettler s F P800 provi des cost effective user oriented inform ation Mettler Instrumente AG Greifensee Switzerland Circle No 29 on Reader Enquiry Card 219 Product news Platelet aggregation A computerized platelet aggregation system is available from Payton through their sole UK distributor Centronic Sales Ltd Using an Apple II microcomputer Payton have produced a system which can be linked not only to their own range of aggregation modules but also to any other make or model of instrument The sof
23. ttler DL 40 Memotitrator have been described to JAC by MSE Scientific Instruments Firstly the company suggests using the DL40 in conjunction with a platinum redox electrode to determine chemical oxygen demand COD results are pre sented calculated in COD units Secondly they draw attention to a paper in Analytical Chemistry which describes the Memotitrator and an Orion fluoroborate electrode to automate determinations of anionic and cationic detergents Finally the titrator is proposed as a method for analysing the purity of silver Full details from MSE _ Scientific Instruments Manor Royal Crawley West Sussex RH10 2Q0Q UK Tel 0293 31100 Circle No 14 on Reader Enquiry Card Moisture determination A variety of products food powders fruits cereals pharmaceuticals adhesives etc have to be tested during processing packaging or storage for moisture con tact Dynatech are marketing an accurate alternative to conventional drying meth ods which can cut the time taken by 75 or more The Artek Accudry uses a digitally controlled infra red radiation drying oven and cooling chamber with a system temperature range from 5 C above room temperature to 150 C the Accudry s method of heating enables products to be dried completely at temperatures which are often lower than those needed with conventional ovens And up to 12 samples can be dried with accuracies of up to 0 1 or better when compared with conv
24. tware package allows inducer concent rations to be automatically computed for precise final concentrations and provides audible and visual prompting for all user tasks A variety of data manipulations can be performed and corrections and alterations entered as appropriate For later retrieval reproduction or analysis all data is stored on a diskette Patients results are provided in hard copy by means ofany suitable 80 column graphics printer The data which is presented in an easily readable form can then be attached to medical records The system provides fast results for a number of standard assays such as Von Willebrand and if required Payton will develop an exact software package to meet specific aggregation needs More information from Centronic Sales Ltd Centronic House King Henry s Drive New Addington Croydon CR9 OBG UK Tel 0689 47021 Circle No 30 on Reader Enquiry Card Turbidity measurement The Model 40 100 measures turbity in drinking water The nephelometer is EPA approved and provides a digital read out directly in nephelometric tur bidity units NTUs The wide range 0 9 99 and 0 99 9 NTUs is appropriate for both raw and finished water studies The 40 100 has a sample viewing port which prevents lint dirt or fingerprints from creating high readings Capped sample bottles eliminate bubbles or con taminants in the sample Operation is easy and dependable with low drift it is readable to
25. uding a graphics plotter HP7470A Hewlett Packard Dept 299A Corvallis Oregon 97330 USA an X Y Z autosample changer and a FiAtron FiAtron Systems Inc 6651 N Sidney Place Milwaukee Wisconsin 53209 USA SHS 300 flow injection system The points made by several people in your Comments Section of the same January March 1983 issue with regard to just beginning to learn the potential of FIA are quite true in our estimation The combination of the echelle grating mul tichannel plasma spectrometer with the ADaM and a full FIA system should open the opportunity to develop applications at a fast rate 218 Hydrogen safety The use of hydrogen as a carrier gas in chromatography has the advantage of fast analysis times it is twice as fast as helium and four times faster than nitrogen The optimum linear velocity giving the highest plate count is much bigger for hydrogen than for the other gases There is only one serious dis advantage the danger of explosion if hydrogen leaks into the ambient air Even with a small leak the explosive limit of 4 can easily be reached in the oven com partment of a gas chromatograph Chrompack developed the Hydrogen Safety System to monitor the actual Circle No 26 on Reader Enquiry Card hydrogen concentration in gas chromato graphs and to take the required pre cautions if the hydrogen concentration becomes a fraction of the explosive limit The concentration at which ga
26. ues and a programmed base line A wide range of further options becomes available if the Varian DS 15 Command Station is substituted for the video monitor scans can be stored on permanent floppy disc memory and fed back to the spectrophotometer at any time and manipulated in the same way as a freshly generated trace For full details of the DMS 100 and the DS 15 write to Varian AG Steinhauserstrasse CH 6300 Zug Switzerland Circle No 2 on Reader Enquiry Card Flue gas A new model of the Anagas Electronic flue gas analyser has been announced The new model is equipped with a self draining facility so it can be used for continuous testing without a build up of condensation within the unit A low cost conversion service is available for existing Anagas users wishing to upgrade their instruments Details from Colwick Instruments Ltd Anagas House Station Road Carlton Nottingham NG4 3AU UK Tel 0602 616272 Circle No 3 on Reader Enquiry Card Characterizing clay minerals A new report from Perkin Elmer details the use of the company s microcomputer based DTA 1700 differential thermal analysis system for characterizing clay minerals These characterizations are im portant to the ceramics pulp and paper minerals fossil fuel catalysts and polymer industries The DTA 1700 is compatible with Perkin Elmer s Thermal Analysis Data Station For further information contact Perkin Elmer Ltd Post Office Lane
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