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acid value dropped from 18.9 KOH to 0?
The Citrus Aurantium Dulcis (Orange) Peel Wax that we use expired so I sent it to a lab to be tested for acid value (for the purpose of recertifying the ingredient’s shelf life). The CoA for this ingredient from the supplier has a minimum 10 and maximum 30 specification for acid value and documents the initial acid value as 18.9.
The results from testing came back with an acid value of 0. I am not very familiar with this unit of measurement so I am wondering if someone could explain how it is possible that the acid value would drop from 18.9 to 0 in just over a year? Is it possible that the lab used some other unit than KOH? Any insight would be appreciated as we are trying to understand the results and would like to avoid having to purchase a new batch if at all possible.
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1 Reply
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Acid value test tells you how much free fatty acids are in a sample. If you got a 0 result I would make sure they ran the test again. That is an incredible drop. If the result is real it means there was some significant oxidation (poor storage conditions) or microbial contamination. Either way I think the material would smell weird. Most likely it was just a bad test.
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