The effects of various constant potentials on reaction and response of typical model compounds were measured by a commercial electron capture detector (ECD). The effluents f'rom this detector were separated by a second gas chromatographic column and detected by a second ECD. This arrangement allowed
Evidence for surface effects in an electron-capture detector
β Scribed by Albert Nazareth; Kathleen O'Connell; Abdellah Sentissi; Roger W. Giese
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 944 KB
- Volume
- 314
- Category
- Article
- ISSN
- 1873-3778
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β¦ Synopsis
We have found surface effects in a conventional electron-capture detector that are significantly reduced in an experimental, more inert version of this detector, both by Varian. These surface effects generate unique patterns of solute response for both pesticides-herbicides, and derivatized cytosine strong electrophores. They also cause a minimum followed by a more pronounced maximum in the response factor with increasing solute concentration, demonstrated with lindane. Certain speculations are presented to account for these observations.
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The use of an electron capture detector for the determination of chlorinated insecticide residues in water is described. A linear response of the detector was found for BHC and DDT isomers and metabolites in the range 0.03-l -20 ,ug/ml. Results for the determination of chlorinated insecticide +BHC;
## Abstract A new design for an electron capture detector cell is described. The cell is compatible with the requirements of high resolution capillary columns and is shown to be useful in applications that require high analysis speed. A unique method of sample introduction reduces the problems of s