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Simultaneous determination of main reaction components in the reaction mixture during biodiesel production
Author(s) -
Šánek Lubomír,
Pecha Jiří,
Kolomazník Karel
Publication year - 2013
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201200967
Subject(s) - repeatability , derivatization , biodiesel , chemistry , flame ionization detector , chromatography , biodiesel production , reagent , transesterification , gas chromatography , vaporization , high performance liquid chromatography , organic chemistry , catalysis
The proposed analytical method allows for simultaneous determination by GC using a programed temperature vaporization injector and a flame ionization detector of the main reaction components (i.e. glycerol, methyl esters, mono‐, di‐, and triacylglycerols) in the reaction mixture during biodiesel production. The suggested method is convenient for the rapid and simple evaluation of the kinetic data gained during the transesterification reaction and, also partially serves as an indicator of the quality of biodiesel and mainly, as the indicator of the efficiency of the whole production process (i.e. the conversion of triacylglycerols to biodiesel and its time progress). The optimization of chromatographic conditions (e.g. the oven temperature program, injector setting, amount of derivatization reagent, and the derivatization reaction time) was performed. The method has been validated with crude samples of biodiesel made from waste‐cooking oils in terms of linearity, precision, accuracy, sensitivity, and limits of detection and quantification. The results confirmed a satisfactory degree of accuracy and repeatability (the mean RSD s were usually below 2%) necessary for the reliable quantitative determination of all components in the considerable concentration range (e.g. 10–1100 μg/mL in case of methyl esters). Compound recoveries ranging from 96 to 104% were obtained.