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- W1987163560 abstract "A new version of the pulsed discharge electron capture detector (PDECD) has been developed and characterized. Changes to the old version include a slightly altered detector geometry, replacement of the polymer insulation with sapphire and quartz, and the use of methane dopant gas instead of nitrogen or hydrogen. Various operating parameters have been investigated and optimized, including discharge current, dopant gas, bias voltage, and sample introduction position. The resulting detector is more inert and more sensitive (a limit of 36 fg for lindane) and capable of operation at temperatures as high as 400 °C. By running 23 halocarbon compounds on the improved PDECD and on a (63)Ni-ECD using the same GC system, we find that the PDECD is superior to (63)Ni-ECD in terms of sensitivity, linearity, and response time. We attribute the enhanced sensitivity to a lower positive ion concentration, which in turn lowers the electron-positive ion rate of recombination. Pesticides (including some real-world samples) have also been analyzed on the PDECD. The results demonstrate that the PDECD can replace the radioactive ECD typically used in these analyses." @default.
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- W1987163560 date "1996-04-01" @default.
- W1987163560 modified "2023-10-17" @default.
- W1987163560 title "Characterization of the Pulsed Discharge Electron Capture Detector" @default.
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- W1987163560 doi "https://doi.org/10.1021/ac951047j" @default.
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