Purging and trapping gas chromatography-mass spectrometry detection method for chloromethane in surface water

The invention discloses a purging and trapping/gas chromatography-mass spectrometry detection method for chloromethane in surface water, and belongs to the technical field of water quality detection. The method comprises the following steps: S01, sampling; s02, sample pretreatment; s03, detecting a sample; in the step S02, the sample is treated with a composite adsorbent. And respectively adding an internal standard solution and a substitute standard solution into the sample, and rapidly injecting into a purging pipe for determination. According to the purging and trapping/gas chromatography-mass spectrometry detection method for chloromethane in surface water, the sample is pretreated with the composite adsorbent, the detection recovery rate is good, and the precision is high. 本发明公开了一种地表水中氯甲烷的吹扫捕集/气相色谱-质谱检测方法，属于水质检测技术领域。该方法包括以下步骤：S01，采样；S02，样品预处理；S03，样品检测；S02中，所述样品用复合吸附剂处理。样品中分别加入内标标准溶液和替代物标准溶液，快速注入吹扫管中进行测定。本发明的地表水中氯甲烷的吹扫捕集/气相色谱-质谱检测方法样品用复合吸附剂进行预处理，检测的回收率好、精确度高。