空气中甲醇短时间浓度的检测方法

建立了纯水低温吸收空气中甲醇、常温吹脱捕集-热解析对试样进行前处理浓缩甲醇的分析方法。采用气相色谱法氢焰离子化检测，提高了方法的灵敏度，降低了方法的检出限。当采样体积为3L时，最低检出浓度为0．08mg/m^3，分析的相对标准偏差为0．63％-4．60％，回收率99．3％～105．0％。能够满足安全生产、环境保护以及职业健康监护的要求。

Determination of Methanol Concentration on Short Time in Air

An analysis method of methanol was established by using of low temperature absorbing methanol with pure water and concentrating methanol with pre-treating sample by purge and trap thermal analysis at constant temperature. Detecting by hydrogen flame ionization detector with gas chromatography increased sensitivity and decreased detection limit. When sampling volume is 3 L, the lowest detection limit was 0.08 mg/m3, relative standard deviation(RSD) was 0.63%-4.60% and recovery was between 99.3%-105.0%. The method could satisfy requirements of safety production, environmental protection and occupational health surveillance.