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Composition and Evaluation of the Thermal Desorption-Gas Chromatographic System for the Measurement of Volatile Organic Compounds in Air  

이수형 ((주)도남인스트루먼트 기술연구소)
송희남 ((주)도남인스트루먼트 기술연구소)
김희갑 (강원대학교 자연과학대학 환경과학과)
Publication Information
Environmental Analysis Health and Toxicology / v.17, no.1, 2002 , pp. 63-71 More about this Journal
Abstract
The thermal desorption-gas chromatographic (TD-GC) system has been constructed for the measurement of volatile organic compounds. The thermal desortion unit is composed of four major parts: 1) the control part; 2) the thermal desorption part; 3) the focusing part; and 4) the injection part. The peltier element was introduced to the focusing part for the temperature of the focusing tube to reach-35$^{\circ}C$. The system was tested for the linearity of the calibration curves and reproducibility of instrumental analyses using some disinfection by-products (DBPs) and BTXs (benzene, toluene and p-xylene). The coefficients of determination (r$^2$) for all the calibration curves made were higher than 0.998, and the coefficients of variation (CV) for triplicate measurements were all within 10％. The system also has been tested for field applicability. The analysis of field samples showed that there was no breakthrough problem in the sampling system and that the system could be applied to field measurements.
Keywords
Thermal desorption; Volatile organic compounds; Peltier element; Disinfection by-products;
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