Journal ArticleDOI
Quantitation in the analysis of transesterified soybean oil by capillary gas chromatography 1
TLDR
In this article, a rapid quantitative capillary gas Chromatographic method was developed for studying transesterification of soybean oil (SBO) to fatty esters, and the effect of carrier gas flow on reproducibility was determined.Abstract:
A rapid quantitative capillary gas Chromatographic method has been developed for studying transesterification of soybean oil (SBO) to fatty esters. Standard solutions containing methyl linoleate, mono- , di- and trilinolein were analyzed with a 1.8 m X 0.32 mm SE- 30 fused silica column. The effect of carrier gas flow on reproducibility was determined. Prior to analysis, mono- (MG) and diglycerides (DG) were silylated with N,O- bis(trimethylsilyl) trifluoroacetamide.Tridecanoin was used as an internal standard. From plots of area and weight relationships, slopes and intercepts for all four compound classes were determined. Agreement between the measured and calculated compositions of the standard solutions was good; the overall standard deviation was 0.4. Slopes and intercepts also were determined for SBO and its methyl and butyl esters. Complete separation of ester, MG, DG and triglyceride was obtained in 12 min by temperature programming from 160 to 350 C. This method of analysis gave excellent results when used in a kinetic study of SBO transesterification.read more
Citations
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Analyzing biodiesel: standards and other methods
TL;DR: In this paper, the restricted species in biodiesel and the physical properties prescribed by the standards, and details the standard reference methods to determine them as well as other procedures are discussed.
Journal ArticleDOI
Kinetics of Palm Oil Transesterification in a Batch Reactor
D. Darnoko,Munir Cheryan +1 more
TL;DR: In this paper, the authors showed that the conversion of triglycerides (TG), diglycerides (DG), and monoglycerides (MG) appeared to be second order up to 30 min of reaction time.
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Jatropha curcas L. as a source for the production of biofuel in Nicaragua
TL;DR: The development of Jatropha curcas L. as a possible energy crop in Nicaragua is discussed in this article, where a technical process for the processing of the seeds and the production of the methyl esters from the seed oil is described.
Journal ArticleDOI
Diesel fuel derived from vegetable oils, VI: Specifications and quality control of biodiesel
TL;DR: In this paper, the parameters and corresponding threshold values defining the quality of RME used as biodiesel according to the latest Austrian standardization (O-NORM) are presented and discussed.
Journal ArticleDOI
Critical review on analytical methods for biodiesel characterization
TL;DR: A review on analytical methods used to evaluate biodiesel quality was written by Knothe as discussed by the authors, and a review of the available techniques and some improvements on the analytical methods for biodiesel characterization can be found in this paper.
References
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Journal ArticleDOI
Variables affecting the yields of fatty esters from transesterified vegetable oils
TL;DR: In this paper, the authors showed that the conversion to methyl, ethyl and butyl esters from cottonseed, peanut, soybean and sunflower oils can be done in 1 hr with an alkaline catalyst.
Journal ArticleDOI
Minor constituents of palm oil
TL;DR: The role played by phospholipids is frequently misunderstood because they can act in two ways, i.e. as an antioxidant synergist and a surface active agent to disperse impurities in oil.
Journal ArticleDOI
Glyceride composition of processed fats and oils as determined by glass capillary gas chromatography
TL;DR: In this article, a high-temperature glass capillary column gas chromatography after derivatization of the fatty acids, mono- and diglycerides with BSTFA [(N,O)-bis(trimethyl silyl) trifluoroacetamide].
Journal ArticleDOI
Determination of mono- and diglycerides in palm oil, olein and stearin
E. M. Goh,R. E. Timms +1 more
TL;DR: Partial glycerides are important constituents of palm oil and can have significant effects on the physical properties of products containing palm oil or on the fractionation of the palm oil.
Journal ArticleDOI
Limits of the internal standard technique in chromatography
TL;DR: In this article, the authors used the law of propagation of error to determine how the internal standard technique affects the reproducibility of a given chromatographic analysis, and provided guidelines for the proper application of the internal-standard technique in the analysis of drugs in biological materials.
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