After mixing pH buffer solution from the little sachets (6.86, 9.81) what would be the impact on accuracy if these buffer solutions were stored in sealed glass jars and re-used used for calibration at a later date?
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sorry, i think i misunderstood question.The pH 9.81 will drift down as it absorbs CO2. I've used buffer solutions for years, just keeping them in the plastic containers they came in, but i did remeasure the pH of them occasionally. The pH 10 solutions drift into the 9.7-9.9 range.
If your meter allows you to input the pH of the buffers, that works fine. if it assumes a certain value, that's not fine.
sorry, i think i misunderstood question.
i never have, but thought question was ,use solution, then store and reuse.
figured it would dilute solution.
correct?? Thanks
I do this now and BBC am able to successfully calibrate. I have now gone to the packet solutionsAfter mixing pH buffer solution from the little sachets (6.86, 9.81) what would be the impact on accuracy if these buffer solutions were stored in sealed glass jars and re-used used for calibration at a later date?