Quantitative determination of diesel oil in contaminated edible oils using high-performance liquid chromatography |
| |
| Authors: | M H Moh T S Tang G H Tan |
| |
| Affiliation: | (1) Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia;(2) Advanced Oleochemical Technology Center, Malaysian Palm Oil Board, Lot 9 & 11, Jalan P/14, Seksyen 10, 43650 Bandar Baru Bangi, Selangor, Malaysia |
| |
| Abstract: | A simple and reliable high-performance liquid chromatography method for the analysis of diesel oil in contaminated edible
oils is described. Analysis performed using a diol column with a mobile phase of heptane and isopropanol (94∶6, vol/vol).
Although baseline separation between diesel and other background fluorescent components was not achieved, quantitation was
still possible using baseline integration. The method is linear over the range of 5–1000 μg/g with a correlation coefficient
(r
2) of 0.9984. Average recoveries from spiked edible oils were 94.4–101.3%, with a limit of quantitation (LOQ) of 5 μg/g for
sunflower oil, palm olein, and groundnut oil. Corn oil has a higher content of ester components, thus, LOQ was slightly worse
(40 μg/g). The applicability of the method was confirmed by gas chromatography-mass spectroscopic detection to show the presence
of diesel hydrocarbons in the suspected contaminated crude palm oil. This procedure provides a simple and sensitive method
for determining diesel oil concentration in contaminated edible oils without prior sample cleanup or extraction. |
| |
| Keywords: | Contamination diesel oil edible oils high-perkformance liquid chromatography |
| 本文献已被 SpringerLink 等数据库收录！ |
|
