Determination of dimethylselenide and dimethyldiselenide by gas chromatography-photoionization detection.
A simple method for the determination of volatile selenium compounds employing a gas chromatograph equipped with a photoionization detector is described. The method involves the direct injection of dimethylselenide (DMS) or dimethyldiselenide (DMDS) into the gas chromatograph; no derivatization of the sample was required. The photoionization detector was capable of detecting 60 pg (0.55 pmol) of DMS and 150pg (0.80pmol) DMDS. Sensitivity was 10-50 times greater with DMS and 4-20 times greater with DMDS when the photoionization detector was employed than when the flame ionization detector was employed.
Hunter
William J
WJ
US Department of Agriculture, Agricultural Research Service, Suite 100, 2150D Centre Avenue, Fort Collins, CO 80526-8119, USA. william.hunter@ars.usda.gov
Kuykendall
L David
LD
D002849:Chromatography, Gas / Q000379:methods*; D016566:Organoselenium Compounds / Q000032:analysis*; D010777:Photochemistry; D012015:Reference Standards; D012680:Sensitivity and Specificity
D016566:Organoselenium Compounds; C037445:dimethyldiselenide; C013503:dimethylselenide