DETOXIFICATION DEVICE OF EXHAUST GAS OF DENSITOMETER FOR TRACE OF OXYGEN, DENSITOMETER FOR TRACE OF OXYGEN EQUIPPED WITH IT AND DETOXIFICATION METHOD OF EXHAUST GAS OF DENSITOMETER FOR TRACE OF OXYGEN

摘要

PROBLEM TO BE SOLVED: To provide a detoxification device of the exhaust gas of a densitometer for a trace of oxygen capable of removing unreacted yellow phosphor vapor contained in the exhaust gas of the yellow phosphor emission type densitometer for a trace of oxygen in a high level and capable of reducing the concentration thereof to the tolerable concentration (0.02 ppm) or below of TLV-TWA. SOLUTION: The detoxification device 10 of the exhaust gas of the densitometer for a trace of oxygen is equipped with a detoxification container 11 filled with a particulate detoxifying agent 13 with an average diameter of about 1 mm comprising cupric hydroxide or copper oxide chemically reacted with yellow phosphor, an introducing port 14 for introducing the exhaust gas, which is discharged from the densitometer 20 for measuring the trace of oxygen in a sample gas on the basis of the intensity of the light emitted by the reaction of oxygen in the sample gas with yellow phosphor vapor, into the detoxification container 11 and a discharge port 17 for discharging the exhaust gas brought into contact with the detoxifying agent 13. COPYRIGHT: (C)2007,JPO&INPIT