便携式催化氧化-FID法测定固定污染源废气中非甲烷总烃

对便携式催化氧化-FID法测定非甲烷总烃的检出限、精密度、准确度、催化效率等性能指标开展研究，考察该方法测定固定污染源废气中非甲烷总烃的适用性。结果表明：催化氧化装置的转化效率为98.1%～99.7%,方法检出限为0.05 mg/m³(以碳计);2个质量浓度水平的甲烷和丙烷混合标准气体测定结果的相对误差分别为-6.4%～6.1%、-4.7%～-0.5%,实验室内、实验室间测定结果的RSD分别为2.9%～5.9%和1.6%～2.5%、1.5%和0.6%。用该方法和国标法同时测定实际样品，两种方法测定结果的相对误差为6.4%～21.4%。

Portable Catalytic Oxidation FID Method for Determination of Non Methane Hydrocarbons in Exhaust Gas from Stationary Source

The detection limit, precision, accuracy, catalytic efficiency of the portable catalytic oxidation FID method for the determination of non methane hydrocarbons were studied. The applicability of the method was investigated. The results showed that the conversion efficiency of the catalytic oxidation device was 98.1%~99.7%, the method detection limit was 0.05 mg/m3 (calculated by carbon). The relative errors of the measurements of methane and propane mixed standard gases at 2 mass concentration levels were -6.4%~6.1% and -4.7%~-0.5% respectively. The RSDs of the measurements in laboratory and between laboratories were 2.9%~5.9% and 1.6%~2.5%, 1.5% and 0.6% respectively. When applying this method and national standard method in determining actual samples simultaneously, the relative errors of the two methods ranged from 6.4% to 21.4%.