FID/DELCD Combination Detector

The FID detects hydrocarbons The DELCD identifies which are chlorinated No eluyent needed for the DELCD - operates in gas phase Low and high sensitivity modes Detects to the low ppm range, and low ppb range, respectively The FID/DELCD is one of the most useful detector combinations because it allows the operator to reliably identify hydrocarbon peaks detected by the FID as halogenated or not. While less sensitive than the ECD detector, the DELCD is much more selective, eliminating interferences which would complicate an ECD analysis (such as ambient oxygen). Sample preparation which might be required for ECD work is not required for the DELCD because of its total selectivity to chlorine and bromine, and because the FID pre-combusts any contaminants. In the high sensitivity mode (hydrogen off, using dry cylinder air), the DELCD can detect down to the low picogram range. In this mode, the DELCD is about 100 times more sensitive than when used with the FID in low sensitivity mode. The D