Determination of methanol in biodiesel by headspace solid phase microextraction.
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%).
Dave C. Swalm School of Chemical Engineering, Mississippi State University, Mississippi State, MS 39762, United States. mcp64@msstate.edu
Maria C
MC
Paraschivescu
Earl G
EG
Alley
William T
WT
French
Rafael
R
Hernandez
Kevin
K
Armbrust
D000438:Alcohols / Q000032:analysis; D002138:Calibration; D002197:Capillary Action; D002849:Chromatography, Gas / Q000379:methods; D008401:Gas Chromatography-Mass Spectrometry; D005742:Gasoline / Q000032:analysis*; D000432:Methanol / Q000032:analysis* / Q000302:isolation & purification; D052617:Solid Phase Microextraction / Q000379:methods*
D000438:Alcohols; D005742:Gasoline; D000432:Methanol