Rapid isolation of some antiepileptic hydantoins and their analogues with Sep-Pak C18 cartridges and capillary gas chromatography with splitless injection

1990 ◽  
Vol 103 (7) ◽  
pp. 479-485 ◽  
Author(s):  
T. Kumazawa ◽  
O. Suzuki ◽  
H. Seno ◽  
Y. Ishikawa ◽  
H. Hattori
Keyword(s):  
Gas Chromatography ◽  
Capillary Gas Chromatography ◽  
Rapid Isolation ◽  
Splitless Injection

Optimization of Sample Introduction Parameters for Determinations of Pesticides by Capillary Gas Chromatography Using a Two Column, Two Detector System

1991 ◽  
Vol 74 (5) ◽  
pp. 872-875 ◽  
Author(s):  
Zeldae E Penton
Keyword(s):  
Gas Chromatography ◽  
Trace Analysis ◽  
Capillary Gas Chromatography ◽  
Test Sample ◽  
Sample Introduction ◽  
Superior Performance ◽  
Injection Speed ◽  
Injection Mode ◽  
Splitless Injection ◽  
Speed Method

Abstract A study was undertaken to determine if another injection mode could be substituted for splitless Injection in the trace analysis of pesticide samples. This technique often leads to problems such as carryover, poor repeatability, and breakdown of labile pesticides. Two capillary injectors were compared: a hot splitless injector and a temperature- programmable Injector, in which the sample is introduced into a glass insert under nonvaporizing conditions. With each injector, 2 columns of different polarity were Installed and a test sample containing a variety of pesticides was split between the 2 columns immediately after introduction. The effects of changing parameters such as Injector temperature, injection speed, method of installation of the 2 columns, and method of filling the syringe were examined for splitless injection. K was concluded that optimization is more difficult with splitless injection. Additionally, a comparison of precision and discrimination data demonstrated superior performance with the nonvaporizlng temperature-programmable Injector.

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