CONTINUOUS CONCENTRATED GAS SAMPLING APPARATUS BY NEBULIZER-DENUDER INTERLOCKING, AND GAS ANALYSIS APPARATUS INCORPORATING THE GAS SAMPLING APPARATUS AND ANALYSIS METHOD

摘要

PPROBLEM TO BE SOLVED: To obtain a gas sampling apparatus for continuously bringing a target constituent in a gas sample into contact with an absorption liquid for high concentration, and to provide an on-site type high-precision analysis system, where the gas sampling apparatus and a portable detection apparatus are combined. PSOLUTION: A required amount of gas sample that is sucked by an air pump 2 through an air filter 1 is discharged to a nebulizer 4 by a gas flowmeter 3. The absorption liquid 6 that is supplied by a liquid dispense pump 5 and is atomized in a minute liquid drop shape by gas samples by the nebulizer flows on the inner wall of a denuder tube 7 and on the surface of a filler along with the gas sample by repeating contact, and a target constituent is condensed and captured in the absorption liquid. Then, the gas sample and the absorption liquid reach a gas-liquid separation cylinder 8 for inertia separation. The absorption liquid for condensing and capturing the target substitute is recovered as a measuring sample solution 9 of a target constituent detection apparatus, and the remaining gas sample is exhausted. The target constituent that is condensed and captured by the absorption liquid is detected by the detection apparatus. A series of analysis operation of the condensation capturing and detection of the target constituent is performed continuously. PCOPYRIGHT: (C)2004,JPO&NCIPI