ผลิตภัณฑ์อาหาร เครื่องดื่ม อาหารสัตว์
เอกสารมาตรฐาน
สหรัฐอเมริกา
AOAC
2000.10
Total Isolated trans Unsaturated Fatty Acids in Fats and Oils: ATR–FTIR Spectroscopy
2000 (2023)
First Action
6
AOAC 2023 Online Ch. 41.1.37A
In most naturally occurring vegetable fats and oils, unsaturated constituents contain only isolated double bonds in the cis conguration. These cis double bonds may be isomerized to the trans conguration during extraction and processing procedures, as a result of oxidation, conversion during heating, and partial hydrogenation. Animal and marine fats may contain measurable amounts of naturally occurring trans fatty acid geometric isomers. Isolated trans double bonds in long-chain fatty acids, fatty acid methyl esters (FAME), soaps, and triacylglycerols may be measured by infrared (IR) spectroscopy...