Problems in the determination of glycerol content
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However, before adding the sodium periodate solution (4.2.5), the blank solution should be adjusted to pH 6.5; after adding the sodium periodate solution, the titration should be carried out until pH 6.5 is reached (GBT 13216.6-91). How to adjust the pH to 6.5? This post was last edited by yzhms on 2009-4-14 14:12]
According to national standards, it is adjusted using a 0.05 mol/L NaOH solution, with a pH meter used for monitoring; it’s quite easy to adjust!
Then, what is the purpose of adding sodium formate before titration with sodium hydroxide?