SEPARATING METHOD OF ORGANIC HALOGEN GROUP, MEASURING METHOD OF LOW-VOLATILITY ORGANIC HALOGENS CONCENTRATION, AND MEASURING METHOD OF DIOXINS CONCENTRATION

摘要

PPROBLEM TO BE SOLVED: To selectively separate organic halogens showing high concentration correlativity with the dioxins concentration in gas to be measured such as exhaust gas, to measure the organic halogens concentration in the gas to be measured, and to accurately determine the dioxins concentration. PSOLUTION: The gas to be measured is introduced into first and second adsorption cylinders 4 and 5, is brought into contact with adsorbent with a superficial area of 10-240 mSP2/SP/g at an adsorption temperature of 50-200 °C. Low-volatility organic halogens are selectively adsorbed of the organic halogen group contained in the gas to be measured, the low-volatility organic halogens are desorbed from the adsorbent, desorption gas is decomposed by a thermal decomposition device 8, the hydrogen halide concentration in the decomposed gas is measured by an analyzing apparatus 9, this value is fed to a data processor 10, the low-volatility organic halogens concentration is determined, and the dioxins concentration is determined based on this. PCOPYRIGHT: (C)2008,JPO&INPIT