Patent ID: 7968053
Filing Date: 2011-06-28
Classification: G01N

Abstract:
1. A chlorine analyzing apparatus for measuring an amount of chlorine contained in a sample by subjecting hydrogen chloride generated by heating the sample to coulometric titration, which apparatus comprises: a reaction tube of a double tube structure comprising an inner tube with an inlet port for air or oxygen for receiving the sample, and an outer tube with a sampling gas outlet port for recovering hydrogen chloride, the reaction tube being capable of allowing a gas to be flowed from the inner tube to the outer tube; an electric furnace having a reaction tube insertion hole into which the reaction tube is fitted, the electric furnace being equipped with a heater disposed around the reaction tube insertion hole; a titration cell receiving acetic acid as an electrolyte for subjecting hydrogen chloride withdrawn from the reaction tube to coulometric titration; and a deodorization tube disposed on a rear stage side of the titration cell for thermally decomposing a vapor of acetic acid discharged from the titration cell, the deodorization tube being fitted into a deodorization tube insertion hole in the electric furnace, wherein the deodorization tube insertion hole in the electric furnace is positioned on an outer peripheral side of the heater and is spaced therefrom so as to control a heating temperature of the deodorization tube to 500 to 800° C. when a heating temperature of the reaction tube is 800 to 1100° C.