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Sample Preparation Methods for Beeswax Characterization by Gas Chromatography with Flame Ionization Detection by J.J. Jiménez; J.L. Bernal; Ma.J. del Nozal; Ma.T. Martín; J. Bernal is a Chemistry article available to read on EtoBox.

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New and simpler methods of sample preparation to determine several families of compounds in beeswax by conventional and high temperature gas chromatography are proposed. To analyze hydrocarbons and palmitates, a dilution of sample is enough whereas for the total acid content, a hydrolysis and simultaneous methylation with BF3-methanol results more effective than the usual methods; for the total content of alcohols, a further acetylation with acetic anhydride is necessary. Free alcohols are directly acetylated in a sample dissolution but for free acids and monoesterified 1,2,3-propanetriols analysis, a previous extraction with acetonitrile is required. The concentrations of all the compounds studied are expressed in weight percentage referred only to one standard: octadecyl octadecanoate. The precision of the analytical methods has been evaluated showing its importance in the analysis of beeswaxes used in apiculture.

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Author

J.J. Jiménez; J.L. Bernal; Ma.J. del Nozal; Ma.T. Martín; J. Bernal

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)

Published

2006

Language

EN

Field

Chemistry (Physical Sciences)