Micro electron-capture detector

Quantification of bifenthrin and permethrin was carried on an Agilent 6890 GC system equipped with a micro-electron capture detector (p-ECD). A capillary column (Agilent-S, 30 m x 0.32 mm 0.2S pm) was used with helium as the carrier gas at 2.1 mL min". The odier GC parameters were as follows inlet ten erature, 2S0°C detector tenqterature, 300 C oven tenqjerature, initially 1S0 C for 1.0 min, ranq>ed to 280 C at IS C min, and kept at 280 C for S min and injection volume, 1.0 pL. Sanq>les were introduced in the splifless mode. Under these conditions, the retention time for bifenthrin, cir-pennethrin, and /rans-permedffin was 9.0,10.2, and 10.3 min, respectively. 

Quan X., Chen S., Platzer B., Chen ). and Geerer M. (2002) Simultaneous determination of chlorinated organic compounds from environmental samples using gas chromatography coupled with a micro electron capture detector and micro-plasma atomic emission detector, Spectrochim. Acta, Part B 57 189-199. 

The Simple or Macro Argon Detector Sensor The Micro Argon Detector The Triode Detector The Thermal Argon Detector The Helium Detector The Pulsed Helium Discharge Detector The Electron Capture Detector The Pulsed Discharge Electron Capture Detector References Chapter 7... 

The FPD does not respond to nitrogen or halogens the AFD does, but much less so than to phosphorus. In those areas, the competition comes primarily from other types of detectors. These are the micro-coulometric and the electrolytic conductivity detectors in the nitrogen and halogen areas and, of course, the electron capture detector for chlorinated hydrocarbons and other electron-attaching compounds. 

With the application of electron-capture (EC) and micro-coulometric detection to gas chromatograph effluents from i960, the era of the measurement of nothing in everything had arrived and the environmental controversy was truly on. It was easier to make an effective EC detector than to interpret the analytical results correctly and many of the identifications of chlorinated insecticide (OC) residues made in the early 1960s are undoubtedly suspect, especially since it was found in 1966 that widespread polychlorobiphenyl (FCB) contamination in the bio-sphere can simulate OC in gas chromatographic analysis. 

Willmont, F.W. Dolphin, R.J. A novel combination of liquid chromatography and electron capture detection in the analysis of pesticides. J. Chromatogr. Sci. 1974,12, 695. McGuffin, V.L. Novotny, M. Micro-column high-performance liquid chromatography and flame-based detection principles. J. Chromatogr. 1981, 218, 179-187. Charlesworth, J.M. Evaporative analyzer as a mass detector for liquid chromatography. Anal. Chem. 1978, 50, 1414-1420. 

Gas chromatography, coupled with flame-ionisation, electron capture (for halogenated species) and mass spectrometric detectors, is the most popular tool for determination of SVOCs in melted snow samples [44]. A prerequisite is the efficient separation of the analytes from the aqueous matrix, which can be accomplished using filtration onto quartz fibre filters and sohd phase extraction [88]. Solid phase micro-extraction, which utilises equihbrium-based adsorption of analytes onto a polymer fibre bundle, has also been proposed and tested in laboratory studies [13, 89]. Both methods allow for an efficient transfer into the injection port of a gas chromatograph without water contamination. Directly coupled inlet sampler with GC-EID instrumentation has also been used [90]. The air sample was pre-concentrated using adsorbents (Carbotrap B, Carbosieve), followed by heating and collection on a cryofocuser (a fused silica capillary tube packed with... 

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