Testing for SO2
Testing for pH and TA
Testing for MLF
The methods and equipment for our Malolactic Fermentation Assay Kit have been updated and changed through the years. We have removed the videos relating to the old methods and old SC-50 instrument. We highly encourage all owners of the old style SC-50 (the one that attaches to your SC-200 or -300) to upgrade to the current standalone unit. Please contact us if you need any additional information. The How To videos for these old methods are still on our YouTube page if needed. The video below is for the newest instrument and follows the most up to date procedure for testing MLF.
Testing for Residual Sugar
*this video is older and needs to be updated. We are working on it and will post the new video as soon as it is available.
Testing for Alcohol by Volume
*this video is older and needs to be updated. We are working on it and will post the new video as soon as it is available.
Testing for YAN
Testing for Dissolved Oxygen
*this video is older and needs to be updated. We are working on it and will post the new video as soon as it is available.
Sentia by Universal Biosensors
Visit our YouTube page for additional videos.
Regarding the video on how to measure TA, I’m not sure why 15.2 was used as starting volume. If we’re testing a 5 mL sample of wine and adding 15 mL of DI water, I thought that the starting volume was still 5.0. In our case the ending volume was 1.0 so therefore our TA is 8 because 5.0-1.0=4. 4×2=8, correct?
Mary,
Thank you for reaching out to us.
Your starting volume is the volume measurement on your burette or syringe that has your TA Titrant in it. Then as you perform the titration and finally reach the endpoint, your final volume is the measurement on the burette or syringe. Then you subtract those two measurements to get your “V” for the calculation. The size of your wine sample is different from your volume of TA Titrant used for this titration.
In your example, if you fill your syringe to the 5mL mark and perform the titration and have an end volume of 1mL on the syringe then yes, your math is correct.
Did this help answer your question?
Taylor
Is there a particular order as to what test to preform first PH, TA, SO2 ?
Thanks in advance
Dave,
Our apologies for the delayed response. We appear to be having some issues with our email.
You can test in whatever order you prefer however it might work best this way… When you need to perform a TA test, you can take your pH reading before beginning your TA titration. When you do your Free SO2 tests, grab you 25mL wine sample needed for the test and then use your pH electrode to get the pH of the sample before continuing on to your SO2 titration using the SO2 electrode.
Let us know if you have any other questions.
Taylor
Do you have a residual sugar assay video?
I watched the sc-55 video and I am confused about the biopressure agent. Rachael never mentions the biopressure agent in the video. Am I correct, two scoops of the biopressure agent to each test vial prior to adding wine, the standard and the water? The pressure measurement would not be accurate without the biopressure agent, right?
Randy,
Right, the biopressure agent is the key ingredient in this test.
In the testing for YAN video she states to use the PH probe but it looks like she is using the Blue SO2 probe. Also it is somewhat hard to read the instructions in white letters when they show up at the bottom of video over the white lab mats, maybe move to the top of the video.
We changed suppliers for our pH probes and they are now blue, just like the SO2 probes. The probes she is using in the video is the pH probe as she mentions. Thank you for the feedback on the video. I will talk with IT and try and get that fixed.
Thank you
Taylor
Change my email to: ***@***.com I tried to change it on the order confirmation page but it would notlet me do it.
Do you have a DO video?
Jeremy, we are completing one now and it should be on the web site soon. Thanks!