Talk:Sørensen formol titration

What is actually being titrated?

Based on the description as being a titration of the free-amine content (yeast assimilable nitrogen) and reaction that involves formaldehyde, I adjusted the wording to focus on the amine part of the structures. But the only reaction that appears to consume base (leaving the excess unreacted to be titrated) is the deprotonation of the carboxylic acid. The amine chemistry does not appear "titratable" in this way. I have therefore tagged the whole article as contradictory. I don't dispute the addition of the winemaking content, but it's not consistent with the reaction as given. I don't have access to its ref to see how much chemistry is discusses. For a name reaction involving a specific chemical reaction, we really need a chemistry ref to discuss the chemistry. DMacks (talk) 02:17, 15 June 2015 (UTC)

• I have edited some, the text should no longer contradict itself? V8rik (talk) 20:49, 16 June 2015 (UTC)

It still doesn't explain how the formaldehyde reaction (reaction of the amine) affects the carboxylic acid titration. Specifically, how does "remaining acidic carboxylic acid group can then again be titrated with base" indicate the amount of amine that had been present? DMacks (talk) 21:14, 16 June 2015 (UTC)

I have been unable to find any decent literature on the topic. Where is the journal of chemical education when you need it. Perhaps we should change text and cite http://medical-dictionary.thefreedictionary.com/formol+titration ? At least that makes sense. V8rik (talk) 19:34, 15 July 2015 (UTC)