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Determination of total and water‐insoluble‐combined lactic acid in lactic acid modified fatty glycerides
Author(s) -
Stetzler R. S.,
Andress T. B.
Publication year - 1962
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02672538
Subject(s) - lactic acid , saponification , glyceride , chemistry , titration , chromatography , fatty acid , extraction (chemistry) , aqueous solution , organic chemistry , bacteria , biology , genetics
Analytical methods for the determination of total and water insoluble combined lactic acid in lactic acid modified fatty glycerides are described. The acids are liberated from their esters by saponification. Lactic acid is determined by simple acid‐base titration after removal of fatty acids via liquid‐liquid extraction. Water soluble constituents are extracted from a dichloro‐methane solution of the esters with 5% aqueous sodium sulfate prior to determination of water insoluble lactic acid. Methods are rapid, simple, and suitable for use in a plant control laboratory. Extension of the procedure provides for the simultaneous determination of fatty acid and glycerine on a single sample.