|
|||||
|
|
Rapid determination of trans-fatty acids in human adipose tissue: Comparison of attenuated total reflection infrared spectroscopy and gas chromatography |
|
| Authors: | J Fritsche H Steinhart MM Mossoba MP Yurawecz N Sehat Y Ku |
| Institution: | aUniversity of Hamburg, Institute of Biochemistry and Food Chemistry, Grindelallee 117, 20146 Hamburg, Germany;bCenter for Food Safety and Applied Nutrition, Food and Drug Administration, 200 C Street, S.W., Washington, DC 20204, USA |
| Abstract: | A rapid attenuated total reflection (ATR) infrared (IR) spectroscopy procedure was used for quantitating the levels of total trans-fatty acid methyl ester (FAME) derivatives in neat (without solvent) test samples isolated from human adipose tissue. This procedure requires no weighing of the laboratory sample. The single-beam spectrum of the trans-containing FAMEs was ‘ratioed' against that of a reference material having only cis double bonds in order to obtain a symmetric absorption band at 966 cm−1 on a horizontal background. A single-reflection ATR diamond cell that requires only about 1 μl of neat FAMEs was used. The average level of trans-fatty acids in human adipose tissue found by ATR (3.07±0.27%) was generally higher than that obtained by gas chromatography (2.59±0.20%). Reasons for such a difference are discussed. |
| Keywords: | trans-Fatty acids |
| 本文献已被 ScienceDirect 等数据库收录！ | |