PDHID(pulsed discharge helium ionization detector)is a kind of universal detector with high sensitivity and high response to almost all inorganic and organic compounds.It is a kind of detector that can detect up to ng/g(10-9)lev-el.PDHID is especially suitable for the analysis of trace impurities in high purity helium,high purity nitrogen and high pu-rity argon.By determining the best working parameters of the chromatography and the valve switching time,the detection efficiency and accuracy of analyzing high purity helium,high purity nitrogen and high purity argon impurities are effectively improved,which is suitable for industrial continuity examination.
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