Comparison of solvent extraction and microwave extraction for release of dimethyl sulfide from cereals and canola.
Natural levels of dimethyl sulfide (DMS) in newly harvested wheat, barley, paddy, and canola were determined by gas chromatography using a flame photometric detector in sulfur mode. The two methods involved determination of DMS in the headspace of cereal or oilseed samples (1) after extraction with microwaves and (2) after a traditional approach using 25% KBr solution. Quantitative results from each method were similar, and therefore both methods are suitable for the determination of DMS in grains and oilseeds. However, the microwave procedure has several advantages; for example, results are obtained very quickly, and only a small amount of sample is required.
Ren
Y L
YL
CSIRO Entomology, G.P.O. Box 1700, Canberra, ACT 2601, Australia. yonglin.ren@ento.csiro.au
D001965:Bromides; D002849:Chromatography, Gas; D002523:Edible Grain / Q000737:chemistry*; D005229:Fatty Acids, Monounsaturated / Q000737:chemistry*; D008872:Microwaves; D017680:Potassium Compounds; D000074262:Rapeseed Oil; D012997:Solvents; D013440:Sulfides / Q000032:analysis / Q000302:isolation & purification*
D001965:Bromides; D005229:Fatty Acids, Monounsaturated; D017680:Potassium Compounds; D000074262:Rapeseed Oil; D012997:Solvents; D013440:Sulfides; C039004:potassium bromide; C004784:dimethyl sulfide