| 摘要 |
PROBLEM TO BE SOLVED: To continuously monitor a volatile organic compound in situ. SOLUTION: A plurality of collecting pipes 1 filled with an absorbent 3 which collects the volatile organic compound contained in a gas by absorption at a normal temperature and, when the absorbent 3 is heated, desorbs the collected volatile organic compound is prepared. Concentration of the volatile organic compound is continuously measured by alternately performing absorbing operation for causing the absorbent filled in the collecting pipes 1 to absorb the compound contained in air to be measured, by supplying the air to the pipes 1 and regenerating and measuring operation for regenerating the pipes 1 by causing the absorbent 3 to desorb the compound by supplying a regenerating gas to the pipes 1 under a heating condition, and, at the same time, measuring the concentration of the compound by introducing the compound desorbed from the absorbent 3 to an analyzer 20 together with the regenerating gas. COPYRIGHT: (C)2004,JPO |
