Simultaneous Measuring Method of Many Volatile Organic Compounds Using A High-Performance Activated Carbon Column.
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概要
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A simple method using a high-performance activated carbon column was developed for simultaneous determination of 23 kinds of volatile organic compounds (VOCs) in the air. An activated carbon (CQS) which had a larger specific surface area, a more extensive pore size distribution and less of an adsorption capacity of water vapor in comparison to the seven conventional adsorbents was selected for the sampling column. The recovery performance tests were carried out by using the column in which 0.7 g of CQS or each of the conventional adsorbent was packed. As a result, the recoveries from the CQS packed column were the highest. All the VOCs were eluted with 10 mL of <I>n</I>-decane at a flow rate of 0.3 mL/min from this CQS packed column. However, in the case of high humidity for a long period of time, the adsorption capacities of the VOCs whose boiling points were low and solubilities in water were high were decreased. If a desiccant pre-column packing with 25 g magnesium perchlorate of 0.83-2.4 mm was used, all the VOCs were able to recover completely. Furthermore, the cross-check tests by the present method and the canister method were carried out, and it was confirmed that the measured data by both methods agreed well. The reproducibility of the present method was better than±10%.<BR>Consequently, 23 kinds of VOCs in the air could be measured simultaneously and accurately by the present method using the high-performance activated carbon column with the magnesium perchlorate column.
- 社団法人 大気環境学会の論文
社団法人 大気環境学会 | 論文
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