大体积进样气相色谱法测定水中乙醛

摘要

试验采用大体积直接进样,气相色谱填充柱进行分离分析水中乙醛浓度.结果表明该方法分离度好、灵敏度高,水中乙醛检出限为0.01 mg/L,乙醛样品加标回收率为98.4%～108.4%;平行测定结果的相对标准差为4.1%(n=7).大体积进样气相色谱法简便、快速、准确、重现性好,适合于水体中乙醛的测定.%The acetaldehyde in water was separated and detected using the combined process of large volume injection and packed column gas chromatography. The results of the test showed that, the said process had good separable degree and high sensitivity, the detection limit of acetaldehyde was 0.01 mg/L, and the recovery of standard addition was 98.4％ - 108.4％; the relative standard deviation got from the parallel determination was 4.1％(n = 7). It could be seen that, large volume injection-gas chromatography process had advantages of convenient, quick, accurate and good reproductivity, which was suitable for the detection of acetaldehyde in water.