Low‐molecular weight organic compositions of acid waters from vegetable oil soapstocks

Abstract

Abstract Alkaline extracts (soapstocks) from canola, corn, cottonseed, peanut, soybean, and sunflower oil refining were acidified, and identities and concentrations of the low‐molecular weight organic components of the resulting acid waters were determined by gas chromatography, followed by mass spectroscopy, and by high‐performance liquid chromatography. The main components of each acid water sample, in order of decreasing concentration and after omitting the fermentation product lactic acid, were phosphoric acid, α‐glycerophosphate, and glycerol from canola; myo ‐inositol, phosphoric acid, α‐glycerophosphate and myo ‐inositol‐1‐phosphate from corn; glycerol, α‐glycerophosphate, myo ‐inositol‐1‐phosphate, and β‐glycerophosphate from cottonseed; phosphoric acid, glycerol, and myo ‐inositol from peanut; α‐glycerophospho‐1‐myo‐inositol, myo ‐inositol‐1‐phosphate, α‐glycerophosphate, and glycerol from soybean; and α‐glycerophosphate, glycerol, myo ‐inositol‐1‐phosphate, and β‐glycerophosphate from sunflower.