Detector cell for measuring picogram quantities of organophosphorus insecticides, pyrethrin synergists, and other compounds by gas chromatography

1967 ◽  
Vol 15 (1) ◽  
pp. 178-181 ◽  
Author(s):  
Willis N. Bruce
Keyword(s):  
Gas Chromatography ◽  
Organophosphorus Insecticides ◽  
Detector Cell

Modified electrolytic conductivity detector cell for gas chromatography

1974 ◽  
Vol 46 (6) ◽  
pp. 755-757 ◽  
Author(s):  
James F. Lawrence ◽  
Alan H. Moore
Keyword(s):  
Gas Chromatography ◽  
Electrolytic Conductivity ◽  
Detector Cell

A New Flash Injector for Gas Chromatography of Organophosphorus Insecticides

1968 ◽  
Vol 51 (4) ◽  
pp. 883-888
Author(s):  
J Solomon
Keyword(s):  
Gas Chromatography ◽  
Glass Tube ◽  
Glass Wool ◽  
Pyrex Glass ◽  
Organophosphorus Insecticides ◽  
Injection Port ◽  
Flame Ionization ◽  
Low Concentrations ◽  
Glass Wool Plug ◽  
Chromatographic Peaks

Abstract A new "flash injector" is described which features the removal of solvent from organophosphorus insecticide solutions prior to gas chromatography, using the stacked flame ionization detector. A micro-thin film of sample is deposited on glass wool for instantaneous vaporization in the injection port by syringe-injecting an aliquot of sample into a Pyrex glass wool plug contained in a specially designed Pyrex glass tube that fits the injection port. After pre-vaporization of the solvent, flash injection is completed by inserting and sealing the tube in the injection port by a mechanical flash injector. The method prodvices good chromatographic peaks and resolution, eliminates solvent peaks and interferences, improves reproducibility, prolongs column life, eliminates the use of septums, and requires little or no cleanup of extracts. Errors due to blow-by in the syringe, caused by injection against high port pressures, are eliminated. Injections larger than 5 /il can be used to facilitate detection of organophosphorus residues in low concentrations without extinguishing the detector flames.

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