Hunter William J, Kuykendall L David
US Department of Agriculture, Agricultural Research Service, Suite 100, 2150D Centre Avenue, Fort Collins, CO 80526-8119, USA.
J Chromatogr A. 2004 Jun 4;1038(1-2):295-7. doi: 10.1016/j.chroma.2004.03.005.
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.
本文描述了一种使用配备光离子化检测器的气相色谱仪测定挥发性硒化合物的简单方法。该方法包括将二甲基硒（DMS）或二甲基二硒（DMDS）直接注入气相色谱仪；无需对样品进行衍生化处理。光离子化检测器能够检测到60 pg（0.55 pmol）的DMS和150 pg（0.80 pmol）的DMDS。与使用火焰离子化检测器相比，使用光离子化检测器时，DMS的灵敏度高10 - 50倍，DMDS的灵敏度高4 - 20倍。
