Capillary fused-silica on-column injection of chlorinated pesticides with an ultra-low volume rotary valve.
Quantitative on-column injections into a fused-silica capillary column were carried out by using a ten-port ultra-low volume rotary switching valve to determine the utility and reproducibility of this rotary valve as an on-column injector. Good reproducibility for repeated injections of chlorinated pesticides was obtained by using an external sample loop and wash loop with the rotary valve. The problems commonly associated with a fine fused-silica or stainless-steel needle on-column capillary injection technique were minimized. The valve was used in the manual mode but can be completely automated with commercially available equipment.
D002849:Chromatography, Gas / Q000379:methods; D005506:Food Contamination / Q000032:analysis; D006371:Helium; D006586:Hexanes; D007306:Insecticides / Q000032:analysis*; D009795:Octanes; D012015:Reference Standards; D012822:Silicon Dioxide
D006586:Hexanes; D007306:Insecticides; D009795:Octanes; D006371:Helium; D012822:Silicon Dioxide