顶空气相色谱法测定高湿度废气中丙酮

Determination of acetone in high humidity waste gas by Headspace Gas Chromatography

建立了高湿度废气中丙酮的测定方法,直接用顶空瓶采集高湿度废气,然后向顶空瓶中加入超纯水,使顶空瓶中的水量恒定,最后用顶空气相色谱法测定顶空瓶中气体浓度,并研究了水份对丙酮测定的影响。方法具有良好的线性和平行性,相关系数在0.999以上,样品测定的相对标准偏差在5%左右。

A method for determination of acetone in high humidity waste gas was developed. Waste gas was collected directly in headspace bottle. Then pure water was added to keep constant water in headspaee vials. Finally acetone concentration in the bottle was determined by headspace gas chromatography. The effect of water content on the determination of acetone was studied. The method has good linearity and parallelism. The correlation coefficient is above 0.999, and the relative standard deviation of the sample is about 5%.