| Résumé | Various factors that could affect analytical values for beeswax, and so also detection of adulteration, have been investigated. Ester value determination was checked using synthetic monoesters. Gas liquid chromatographic analysis of overheated wax confirmed that free acids decreased on heating and also showed loss of unsaturated hydrocarbons and of monoesters. The saponification cloud point detected as little as 1% of a paraffin mp 83 C (chain length C₂₀–C₆₀) but only 6% or more of a paraffin mp 53 C (chain length C₂₀–C₃₅). Gas liquid chromatographic analysis of the hydrocarbon fraction of waxes containing these paraffins detected 1% of either paraffin, but only the low melting paraffin was estimated accurately. The presence of 2.5% of carnauba wax in beeswax was detected and estimated by gas liquid chromatography. |
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