How much more sensitive is a TCD detector than an HID detector for carbon dioxide quantitation? - shincarbon and carbon dioxide
I want a new column MolSieve Restek, ShinCarbon mol sieve, but all his papers, showing proof of HID and a TCD detector. The TCD is indicated in its case in the literature, but no data is displayed.
Monday, February 1, 2010
Shincarbon And Carbon Dioxide How Much More Sensitive Is A TCD Detector Than An HID Detector For Carbon Dioxide Quantitation?
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Try This --
The TCD consists of four strands of tungsten and rhenium in a Wheatstone bridge configuration. Current flows through the four components makes them hot. Carrier gas (usually helium has high thermal conductivity to remove) on the filaments heat at a constant rate. When a molecule of the sample with a lower thermal conductivity results from the column and flows through the two strands of the sample increased, the temperature of the filament imbalance of the Wheatstone bridge and generates a peak, the participation of molecules of the sample to the detector. The TCD detector is useful because each molecule, not just oil, it is generally for gas analysis with fixed effects (O2, N2, used detect CO, CO2, H2S, NO, NO2, etc.), where the target analytes do not respond well to other detectors. The TCD is the detection of concentrations of 100% up to about 100 ppm capable, but not less. Even at 100 ppm is possible that when chromatography offering provides a sharp point in a flat rate. If the peak is broad or base is not perfectly flat, DETEction limit of 300 ppm, are realistic. Best suited for low detection limits, HID detector for inorganic and May is of course the FID has 1 ppm for species detection of hydrocarbons.
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