n :  a value similar to a Reichert value that indicates the content in butter or other fat of the volatile water-insoluble acids (as capric acid and lauric acid) - called also Polenske number 
 
Polenske, Eduard (fl 1889-1912), German chemist. Polenske introduced a method for the detection of coconut oil in butter and lard in an article published in 1911. He developed his method after examining 34 fresh and eight old butters.
 
 
 
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