Operation and Calibration of the UV-Vis - TIAER
Contents
1. 5 2 2 Start the UVProbe 2 33 software from the computer icon 5 2 3 Install the correct cell holder for the application refer to analytical SOP for details Leave the cell slot blank 5 2 4 Ensure that the Photometric view is open then click Connect to establish the link between computer and instrument This may take several minutes 5 2 5 If connection window shows errors troubleshoot according to the User s Manual Problems may include power not being on blocked light path or light source not working 5 2 6 Once all test have passed and a connection is established click OK 5 2 7 Click the A Go to WL and enter the wavelength desired 5 2 8 Fill the required cell with blank reagent or reacted blank Use a Kimwipe to gently wipe down the cell light path and hold up to look through at light Ensure no droplets or smudges are Rev 8 Page 6 of 8 TIAER QAM I 103 Operation and Calibration of the UV VIS Spectrophotometer present Wipe until clean DI water or ethanol may be needed to clean the cell ends 5 2 9 Place the cell in the holder and click Auto Zero Repeat for each wavelength used per analytical SOP 5 2 10 The program takes continuous readings for subsequent measurements of samples and standards in the cell Allow the reading to stablize to 3 decimal places and take the best reading for the 4 5 2 11 Power off instrument and computer when complete and clean up cell and work area 5 2 12 O2. Prior to performing any analytical procedure using the uv vis spectrophotometer the standard operating procedure for chemical analysis are reviewed to determine all of the required parameters and standards 5 Procedure 5 1 Beckman Coulter DU 640 primarily for determination of OPO4P and as a backup to the other instruments 5 1 1 Powering Up 5 1 1 1 The instrument may be turned off overnight 5 1 1 2 Turn on the instrument with the power switch located on the right hand side of the back of the instrument The display should illuminate and a message window with Executing Power Up Diagnostics should be displayed 5 1 1 3 In a few minutes a table indicating the Power Up Diagnostics will be displayed The table should indicate that the parameters RAM Option and Programmability are Not Installed and that RS232 Ports 3 and 4 is Installed The word Passed should be indicated for all other parameters Rev 8 Page 3 of 8 TIAER QAM I 103 Operation and Calibration of the UV VIS Spectrophotometer 5 1 1 4 If any parameter fails flush the flow cell with cleaning solution and DI water and turn the instrument off Repeat power up steps Consult manual for troubleshooting if necessary Continue when the instrument successfully completes power up diagnostics 5 1 1 5 Move the cursor arrow to the upper right hand corner of the Power Up Diagnostics table to the word quit and click on it to exit 5 1 2 C
3. run 5 1 4 10 When the run is complete open the 1 Get Data icon on the auxillary computer This will bring up a box click the activate button Open the SAVECLEAR icon on the instrument screen Change the file name to DATA and Rev 8 Page 5 of 8 TIAER QAM I 103 Operation and Calibration of the UV VIS Spectrophotometer click O K Choose O K and overwrite both files Exit the box on the auxillary computer All further steps will be with the auxillary computer only 5 1 4 11 Open the 2 Change Data icon Open the file data duf or data file Change the data to Excel format and save as data The old file will be written over 5 1 4 12 Open the 3 Data icon and type in standard designations and sample s in Sample ID column Print the file and affix to the Personal Logbook 5 1 4 13 If desired automatically transfer the data file to ESDMS or data management system 5 1 4 14 Data may also be entered manually into ESDMS system 5 1 4 15 Flush ethanol through the system followed by DI Other cleaning solutions may be used on occasion Refer to specific SOP for instructions 5 1 4 16 If finished turn off the light source and clean area 5 2 Shimadzu UV 2450 Manual only no autosampler used at this time primarily used for chlorophyll and pheophytin analyses low level orthophosphate P and NO3N and as a backup to the DU 640 5 2 1 Power up the instrument and the computer
4. QAM I 103 Operation and Calibration of the UV VIS Spectrophotometer Revision 8 Approval Ls A ae j jji 5 bh AX A b l4 lis Laboratory Manager Date Laboratory Quality Assurance Officer ee p 7 E Concurrence i Date Effective date 4 Renewal date Initials Texas Institute for Applied Environmental Research QAM I 103 Operation and Calibration of the UV VIS Spectrophotometer 1 Applicability This procedure applies to the operation and calibration of the Beckman Coulter DU 640 UV VIS and Shimadzu UV 2450 manual mode spectrophotometers located in the chemistry laboratory of the Texas Institute for Applied Environmental Research TIAER Tarleton State University Stephenville TX This procedure shall be performed prior to any analysis using one of the spectrophotometers 2 Purpose The purpose of this procedure is to provide a method for operation and calibration of the DU 640 and UV 2450 spectrophotometers By utilizing appropriate chemisty SOPs to perform the standard calibration for each set of samples the analyst eradicates anomalies due to reagent mixture variations sample preparation variations and instrument sensitivity fluctuations The operation of the instrument allows the analyst to determine the concentration of various chemical species which are dissolved in water samples or extracts analyzed by the TIAER chemistry laboratory 3 Definitions 3 1 Automated Sipping Device A device used in conjunct
5. alibration 5 1 2 1 Turn on the appropriate source by clicking on the VIS OFF or UV OFF on the menu bar The icon selected should turn red and change to VIS ON or UV ON to indicate that the source is on 5 1 2 2 Allow the instrument and source to warm up and stabilize for approximately 30 minutes 5 1 2 3 Select the Fixed Wavelength mode 5 1 2 4 Prepare a calibration blank with DI water or extracting solution and all reagents that will be used in the samples according to the proper procedure 5 1 2 5 The instrument should be in absorbance mode Mode can be changed by clicking the icon next to the word mode Clicking will toggle the instrument between absorbance Abs and percent transmittance T 5 1 2 6 Click on the field to the right of the A and input the proper wavelength for the analyte being tested 5 1 2 7 Draw the blank into the flow cell by inserting the sipper tube into the culture tube and pressing the fill button on the pump 5 1 2 8 Click on the blank icon on the menu bar When the Reading Blank box disappears the instrument is calibrated and ready for use 5 1 3 Pre operation Checks 5 1 3 1 Prior to performing any analytical operations the analyst verifies proper connection between the instrument and all output devices Rev 8 Page 4 of 8 TIAER QAM I 103 Operation and Calibration of the UV VIS Spectrophotometer 5 1 3 2 If the system is connected to an automa
6. ion with the instrument serving as a sample container to photometric cell sample delivery conduit 4 Equipment Reagents and Standards 4 1 Equipment 4 1 1 Beckman Coulter DU 640 spectrophotometer 4 1 2 Shimadzu UV 2450 spectrophotometer 4 1 3 10 mm square sided silica or quartz cuvette for uv region or 10 mm square sided glass or plastic cuvette for the visible wavelength region may be flow through or manual pour cells 4 1 4 100 mm tubular cuvette or other sizes 4 1 5 Cuvette holder adapted for size of cuvette 4 1 6 Automated sipping device or autosampler if applicable Rev 8 Page 2 of 8 TIAER QAM I 103 Operation and Calibration of the UV VIS Spectrophotometer 4 1 7 Sample tubes or other glassware appropriately sized to serve as mixture vessels for water samples or extracts and reagents 4 1 8 Autosampler boats 4 2 Reagents 4 2 1 Deionized Water DI 4 2 2 Color reagent solutions contain all color or complexing reagents sample solvents and other chemical species which will be added to the samples prior to analysis by the uv vis instrument Refer to the appropriate chemical SOP for specific solutions and uses Non color reagents are also used in organic extractions and sample preparation 4 2 3 Cleaning solution for automated sipper and cell add 5 drops Triton X 100 and 5g NaOH to 500 mL DI H20 and dissolve 4 3 Standards 4 3 1 The standards required for the analysis of samples are determined by the analyte
7. ther developmental methods such as multiwavelength scans and timed reading may be performed for informational studies and research Consult the User s Manual for these operations Included herein is only the simple manual operation of the instrument 6 Quality Control and Safety Aspects 6 1 All aspects of this procedure shall comply with QAM Q 101 Laboratory Quality Control and QAM S 101 Laboratory Safety 6 2 Quality Control 6 2 1 The analyst always uses matched cuvettes if using more that one cuvette when performing analysis with the uv vis spectrophotometer This ensures the pathlength parameters will be equivalent and the measurements are accurate and reproducible 6 2 2 The preparation of all samples standards and blanks are carried out using identical methods and preparatory equipment This eliminates the majority of errors which may be introduced during sample solution preparation 6 2 3 The auto sampler cuvettes and all associated equipment are cleaned and rinsed thoroughly with DI water prior to and following use Other cleaning solutions may be required on occasion at the direction of the Laboratory Manager Rev 8 Page 7 of 8 TIAER 6 3 QAM I 103 Operation and Calibration of the UV VIS Spectrophotometer 6 2 4 All instrument maintenance performed on the spectrophotometer are documented in the Maintenance Logbook QAM Q 103 1 6 2 5 Any major modification or parts replacements initiates a new Demons
8. tic sipping device check the connections between the device and the instrument also 5 1 3 3 Once all connections have been checked sample analysis is ready to be performed 5 1 4 Operation 5 1 4 1 Power up instrument as described above 5 1 4 2 Calibrate the instrument as described above 5 1 4 3 Click on the field to the right of the Factor and input the proper factor 5 1 4 4 Using the proper vials as reaction containers prepare the samples and standards as indicated in the standard operating procedure for the chemical analysis 5 1 4 5 Normally the analytical order is set by placing a blank solution in the first slot then following with the standards samples and quality control aliquots which include duplicates and spikes 5 1 4 6 Use the complete set of standards listed in the standard operating procedure for chemical analysis immediately after the blank 5 1 4 7 An initial calibration verification and initial blank verification should be performed at the beginning of an analytical run and a continuing calibration verification and continuing calibration blank check are placed at the end of each QC batch Other verification such as laboratory control standards or limit of quantification standards may be used if required by project 5 1 4 8 Load the sample boat onto the auto sampling device 5 1 4 9 Click on the Read Samples icon to begin analysis and allow the instrument and auto sampler to complete the
9. tration of Performance in accordance with QAM Q 101 Laboratory Quality Control to ensure the instrument is functioning properly prior to data generation 6 2 6 The DU 640 retains calibration factors and only needs to be re calibrated at the direction of the Laboratory Manager Calibration information is kept with each analytical run record Safety 6 3 1 The solvents or complexing reagents which are used during analysis of water samples or extracts may be toxic or acidic The analyst always consults the MSDS files if he or she has any question as to the safe handling of any reagent required by the standard operating procedure for chemical analysis 7 References 7 1 7 2 7 3 7A DU SERIES 600 SPECROPHOTOMETER OPERATING INSTRUCTIONS MANUAL Bec kman Instruments Inc 1992 Fullerton CA Manual 514531B User s Manual UV 2450 Shimadzu Corporation 2008 Kyoto Japan National Environmental Laboratory Accreditation Conference NELAC standards TNI 2009 TIAER Quality Assurance Manual QAM Q 100 latest revision 8 Attachments None Rev 8 Page 8 of 8 TIAER
Download Pdf Manuals
Related Search