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The purpose of this paper was to develop and validate a simple adapted method for the quality control of the determination of total esters, mono-, di-, and triacylglycerides and free and total glycerol content in methyl or ethyl biodiesel. Advantages of the method over the standard EN 14103 and EN 14105 methods include reduced sample preparation and analysis time and wide applicability to biodiesel...
A new fluorescent reagent for carboxylic acids, 4-N,N-dimethylaminosulfonyl-7-N-(2-aminoethyl)amino-2,1,3-benzoxadiazole (DBD-ED) was synthesized from 4-N,N-dimethylaminosulfonyl-7-chloro-2,1,3-benzoxadiazole (DBD-Cl) and 1,2-diaminoethane. DBD-Cl is also a new compound described in this work for the first time. The applicability of DBD-ED as a precolumn derivatization reagent in liquid chromatography...
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