环境空气中苯系物的测试方法比对

Comparison of Ambient Air BTEX Test Methods

本实验对苯系物的固体吸附/热脱附与活性炭吸附/二硫化碳解吸-气相色谱法两种方法作比较。结果表明,在检出限与精密度的分析比较中,热脱附法更具优势,适合用于分析清洁空气中的苯系物。此外,解吸法不适用于较低浓度苯系物的测定,但优点是能对同一样品多次重复分析。

Two methods, the solid adsorption/thermal desorption and the activated carbon adsorption/carbon disulfide desorption-gas chromatography of BTEX, were compared in this experiment. The results showed that the thermal desorption method was more advantageous in the analysis and comparison of detection limit and precision. It was suitable lbr the analysis of BTEX in clear air. In addition, the solvent desorption method wasn＇t suitable lbr the determination of BTEX at lower concertrations, but it had the advantage of repeated analysis of the same sample.