Quality control of vegetable oil methyl esters used as diesel fuel substitutes: Quantitative determination of mono-, di-, and triglycerides by capillary GC
✍ Scribed by Plank, Christina ;Lorbeer, Eberhard
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 331 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0935-6304
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Vegetable oil methyl esters are increasingly being used as substitutes for petroleum‐based diesel fuels. Because the presence of triglycerides and partial glycerides in the fuel as a result of incomplete transesterification of vegetable oils can lead to serious engine problems, continuous quality control of the product is essential. A rapid gas chromatographic method has been developed for the quantitative determination of mono‐, di‐, and triglycerides in vegetable oil methyl esters.
Prior to analysis, mono‐, and diglycerides were silylated with N,O‐bis(trimethylsilyl)trifluoroacetamide; tridecanoin was used as internal standard. Calibration was performed by analysis of standard solutions containing mono‐, di‐, and triolein: the calibration plots for mono‐ and diglycerides showed good linearity, whereas for triglycerides no linearity was observed for triolein concentrations below 0.05 mg/ml. When a non‐linear multi level calibration was employed for the quantitation of triglycerides, the method gave excellent quantitative results for mono‐, di‐, and triglycerides in vegetable oil methyl esters.