Determination of Propylene Glycol in Commercial Foods by Gas Chromatography

Abstract

Few information has been available to the analytical procedures and content of propylene glycol in foods. Analytical procedure of propylene glycol by gas chromatography was investigated, and the propyllene glycol content in 150 varieties of commercial foods was analyzed. Propylene glycol in some foods was indentified by gas chromatography-mass spectrometry. The propylene glycol content in foods was in the range of 1, 021 to 27, 611 ppm for the purpose of increasing water coating ability and for the solvent of various food additives in the range of 32 to 985 ppm. Noodles (10g) containing 2.4mg of propylene glycol were boiled for 2min at 95°C, and 1.32-1.80mg (55-75%) were lost in water.