Determination of methanol in biodiesel by headspace solid phase microextraction.

Determination of methanol in biodiesel by headspace solid phase microextraction.

Bioresource technology (2007-11-27)

Maria C Paraschivescu, Earl G Alley, William T French, Rafael Hernandez, Kevin Armbrust

摘要

A new direct gas chromatography procedure (headspace solid phase microextraction) was developed for the quantitative determination of methanol in biodiesel. The analysis was performed by exposing a carboxen-polydimethylsiloxane SPME fiber assembly to the headspace of the biodiesel sample. The gas chromatography used a HP-5 capillary column and flame ionization detection. A polynomial relationship was observed between the methanol concentration and its peak area. This method showed good reproducibility (average relative standard deviation 7.06%) and recovery (average recovery 100.2%).

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