Measuring the Dissolved Oxygen of Wine in Tanks
Contents
1. Measuring the Dissolved Oxygen of Wine in Tanks Water Analysis Instruments Thermo Fisher Scientific 700 2 0N u01 82 ddy Key Words Wine quality dissolved oxygen RDO sensor portable meter beverage testing Goal The following application note describes how to reliably measure the oxygen content of wine directly in the tank using a Thermo Scientific Orion Rugged Dissolved Oxygen RDO Sensor with automatic temperature compensation and a Thermo Scientific Orion Star A223 RDO DO portable meter Introduction Equipment Wineries have become increasingly concerned with the e Orion Star A223 RDO DO Portable Meter Kit oxygen incorporation in the wine during the bottling includes RDO optical DO sensor portable meter armor process This is an extremely important issue that field case and USB computer cable Cat No influences wine quality stability and longevity Although STARA2235 oxygen is a part of the wine s natural aging process or adverse levels can cause discoloration to white wines and e Orion Star A223 RDO DO Portable Meter Cat No flavor degradation to both white and red varietals The STARA2230 or equivalent Orion portable RDO meter ion of molecul houl i Roncent ze Sof molalar oyge should DE mrAgtEd Mi e RDO Optical DO Sensor includes calibration sleeve and stainless steel sensor guard Cat No 087010MD Solutions e Deionized water DI the wine before bottling begins and throughout the ent2. 087050MD Thermo Scientific Orion RDO Sensor with 30 Meter Cable 087100MD Calibration Sleeve for RDO Sensors 087003 Accessories Stainless Steel Protective Sensor Guard for RDO Sensors 087002 RS232 Computer Cable 1010053 thermoscientific com water 2014 Thermo Fisher Scientific Inc All rights reserved Microsoft and Excel are trademarks of Miscrosoft Corporation All other trademarks are the property of Thermo Fisher Scientific and its subsidiaries Water Analysis Instruments North America Netherlands India Japan Tel 1878 237 6000 Leech tener RLaceCihemOnnetioh Wellstone Thermo info water thermo com foe Singapore Astalik SCIENTIFIC e ees a A al awe ae leat P1300 735 295 A Thermo Fisher Scientific Brand InfoWaterAU thermofisher com AN DOWINETANK E 0714 RevA
3. e Data Log On e Date Time Set current date amp time Sensor Performance Checks The RDO sensor should read between 98 and 102 saturation in the calibration sleeve after calibration The RDO sensor should stabilize during calibration within 2 minutes when working properly Make sure to thoroughly rinse and blot dry the DO sensor after measuring samples and before placing into the calibration sleeve see Comments section Refer to the RDO sensor user manual if the sensor does not pass the performance checks Sensor Rinsing Soaking and Storage After each sample measurement rinse the RDO sensor thoroughly with deionized water and blot the sensor dry with a lint free cloth For short term storage overnight or between measurements keep the RDO sensor in the calibration sleeve or a biochemical oxygen demand BOD bottle with water saturated air For long term storage keep the RDO sensor in the calibration sleeve Optical Sensor Luminescence Based Dissolved Oxygen Sensor Sensing Foil Optical Window Lumiphore Photo Diode with red filter for Returning Light Sensor Cap Light Pipe for blue light Blue Filter Blue LED Red LED Pt Sample Preparation and Preservation Dissolved oxygen can be measured directly in the tank Samples cannot be preserved Measure samples on location for the best results or immediately following sample collection If samples must be collected and moved use an air tight container fil
4. blot all excess water with a lint free cloth several times before putting the sensor in the calibration sleeve Rinsing following the completion of all sample measurements should take 5 to 10 minutes The Star A223 meter data log collects up to 1000 measurement sets with time and date stamp and the non volatile meter memory preserves data even with loss of power Download Orion Star Com software to facilitate the transfer of the data log from the meter to a computer at www thermoscientific com OrionMeters Use the Orion Star Com software to export data to a Microsoft Excel spreadsheet or as a comma separated value file csv or print data to a network or local printer Quality Control QC Recommended QC procedures include calibration check of the thermistor temperature sensor response against a calibrated NIST traceable thermometer and recovery of an air saturated deionized water sample Notes e Keeping the calibration sleeve clean and free from water or sample droplets is essential to getting good calibration and read back values in water saturated air Rinse the RDO sensor thoroughly with deionized water and wipe excess water with a lint free cloth prior to putting the sensor in the calibration sleeve e RDO sensors do not require stirring or a sample stream for accurate measurements e RDO sensors are offered with 3 6 10 15 or 30 meters cable lengths e If readings are slow or inconsistent ensure the temperature s
5. concentration ISE conductivity and dissolved oxygen analysis plus spectrophotometry colorimetry and turbidity products gt a aa _ is w a s z Daa o To purchase an Orion Star A223 RDO DO portable meter Orion RDO sensor and other related products please contact your local equipment distributor and reference the part numbers listed below Product Description Part Number Thermo Scientific Orion Star A223 RDO Dissolved Oxygen Portable Meter STARA2230 Thermo Scientific Orion Star A223 RDO Dissolved Oxygen Portable Meter Kit with STARA2235 RDO Optical DO Sensor Portable Meter Armor Field Case and USB Computer Cable Thermo Scientific Orion Star A326 pH RDO DO Portable Meter Kit with ROSS Ultra Portable Meters Low Maintenance Gel pH ATC Electrode RDO Optical DO Sensor Portable Meter STARA3265 Armor Field Case Calibration Solutions and USB Computer Cable Thermo Scientific Orion Star A329 pH ISE Conductivity RDO DO Portable Meter Kit with ROSS Ultra Low Maintenance Gel pH ATC Electrode Conductivity Sensor RDO STARA3295 Optical DO Sensor Portable Meter Armor Field Case Calibration Solutions and USB Computer Cable Thermo Scientific Orion RDO Sensor with 3 Meter Cable 087010MD Thermo Scientific Orion RDO Sensor with 6 Meter Cable 087020MD RDO Sensors Thermo Scientific Orion RDO Sensor with 10 Meter Cable 087030MD Thermo Scientific Orion RDO Sensor with 15 Meter Cable
6. ensor is completely submerged in the sample e If the temperature sensor is not in the sample the DO readings will be incorrect e The RDO cap must be replaced every 365 days The remaining RDO cap life can be viewed in the RDO DO channel setup menu The meter will display an error message when the RDO cap needs to be replaced Results Dissolved Oxygen Readings in Wine Sample Oxygen mg L Sample 1 Sample 2 Mme O RDO Polarographic RDO Polarographic 1 0 55 0 49 0 46 0 36 2 0 39 0 33 0 27 0 27 3 0 34 0 28 0 22 0 22 4 0 30 0 26 0 19 0 20 5 0 28 0 24 0 17 0 19 DO Probe Responses in Red Wine 1 5 1 2 g 0 9 E S 06 S 0 3 0 0 L L L L L L L L J 30 60 90 120 150 180 210 240 270 Time seconds RD02 s RDO1 s Polarographic 1 300 Polarographic 2 Summary Using an Orion Star A223 RDO DO portable meter with an RDO optical dissolved oxygen sensor enables wineries to continually produce high quality wines Because the RDO sensor is designed to measure the wine directly in the tank dissolved oxygen measurements can be made with speed and accuracy The speed accuracy and precision of the RDO sensor is equivalent or superior to current DO measurement techniques Visit www thermoscientific com water for additional information on Thermo Scientific Orion products including laboratory and field meters sensors and solutions for pH ion
7. ire wine making process By using a Thermo Scientific Orion RDO optical dissolved oxygen sensor and a Thermo Scientific Orion Star A223 RDO DO portable meter reliable oxygen measurements can be made directly in the tanks which hold the wine Luminescence Based Dissolved Oxygen Method The oxygen content of wine must be monitored throughout the wine making process Using the RDO sensor with built in automatic temperature compensation and a portable meter reliable measurements can be made directly in the tanks which hold the wine RDO Sensor Setup Refer to the RDO Optical Dissolved Oxygen Sensor User Guide for detailed assembly and preparation instructions for the RDO sensor Place the RDO sensor into a calibration sleeve and moisten the sponge in the calibration sleeve with deionized water Connect the RDO sensor to the 9 pin MiniDIN input on the meter Once assembled the RDO sensor can be used immediately Meter Setup Turn the Star A223 RDO DO portable meter on The meter should automatically detect the type of DO sensor and update the measure type to RDO In the measurement mode set the measurement units to mg L Access the setup menu and update the RDO DO channel settings to the following as needed e Measure Mode Auto e Measure Unit mg L e Resolution 0 01 e Read Type Auto Read e Baro Pressure Auto e Salinity Correct Manual 0 0 Update the instrument settings to the following as needed e Export Data On
8. l completely with no air space and keep the container sealed until immediately before measuring the sample Calibration Prepare the calibration sleeve by moistening the sponge squeezing out excess water and inserting the RDO probe Perform a water saturated air Air calibration with the RDO probe in the prepared calibration sleeve The water from the sponge will saturate the air in the calibration sleeve and act as the calibration standard A stable reading of 100 0 saturation should be displayed within about two minutes during the calibration Analysis Rinse the RDO sensor with deionized water and blot excess rinse water off with a lint free cloth If measuring below the tank surface attach the stainless steel sensor guard to the sensor to weigh and sink the sensor to the desired tank depth Place the RDO sensor in the tank making sure that the temperature sensor is also submerged in the sample Initiate a reading using the Auto Read measurement mode by pressing the measure key on the meter keypad For best results take a second reading to ensure the dissolved oxygen measurement is fully stabilized as it may take the RDO sensor one to two minutes to fully stabilize in the wine sample Use the second stable value for the oxygen content of the wine Both readings will be saved in the meter data log Comments It is important to thoroughly clean the RDO sensor after sample measurement Rinse with deionized water and thoroughly
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