以蒸馏水作为吸收介质吸收空气中的甲醛,在常温下进行吹扫捕集,并用气相色谱法进行测定.同时对甲醛的稳定剂甲醇的用量、吹扫捕集的吹扫气流速和吹扫时间进行了优化,并在优化的实验条件下,测定了某新装修房间的甲醛含量.该方法对甲醛的检出浓度可达到0.04mg/m3,且除了使用极微量的甲醇以外,几乎没用到有机溶剂,因此该方法具有检出限低、灵敏、快速、环保等特点. Using distilled water as absorption medium to absorb the formaldehyde in the air, carrying out purge and trap at room temperature, and measuring by gas chromatography, and using the amount of formaldehyde stabilizer, methanol, purge and trapped purge gas flow rate and purge time Was optimized and the formaldehyde content of a newly renovated room was determined under the optimized experimental conditions.The detection concentration of formaldehyde in this method can reach 0.04mg / m3, and is almost useless except using a trace amount of methanol Organic solvent, so the method has low detection limit, sensitive, fast, environmentally friendly and so on.