Patent ID: 9285344
Filing Date: 2016-03-15
CPC Classification: G01N

Claim Text:
1. A discharge ionization current detector for detecting an ion current by introducing a sample gas into a tubular body through a tubule, the tubular body having at a first end a cylindrical dielectric around the outer periphery of which an electrode for discharge is formed, and the tubule for introducing a sample gas being inserted into the tubular body at a second end, by ionizing said sample gas using plasma generated by applying a low frequency, alternating current voltage to said electrode for discharge while allowing a gas for generating plasma to flow through said first end, and at the same time by collecting the resulting ions around a collector electrode provided closer to said second end than said electrode for discharge, wherein the discharge ionization current detector comprises: an outlet for discharging a gas, created in said tubular body at a point closer to said second end than said collector electrode, and a partition, provided between the outlet for discharging a gas and said collector electrode in the direction in which the tubular body is crossed, for separating the tubular body into a first chamber on the side of the first end where the sample gas is ionized and a second chamber on the side of the second end, the first chamber having the electrode for discharge and the collector electrode, the second chamber having the outlet for discharging the gas, the partition having a through hole for allowing the first and second chambers to communicate with each other, wherein the tubule is inserted into the through hole, and an opening at one end of the tubule is located closer to said first end than the partition.