吹扫捕集-气相色谱-质谱联用法测定地表水中1,2-二氯苯和1,4-二氯苯研究

Determination of 1,2-dichlorobenzene and 1,4-dichlorobenzene in Surface Water with Purge and Trap-Gas Chromatography-Mass Spectrometry

通过吹扫捕集富集地表水中1,2-二氯苯和1,4-二氯苯,解吸后用气相色谱-质谱联用法同时测定,内标法定量,加入硫酸钠提高方法的灵敏度,优化并验证检测方法。1,2-二氯苯和1,4-二氯苯在一定浓度范围内线性关系良好,方法检出限为0.01μg/L,加标回收率和测定结果的相对标准偏差较好,符合分析测试质量控制要求。具有操作简单、样品用量少、组分损失低、回收率高等优点,不对环境造成二次污染。

Surface water by purge and trap enrichment of 1,2-dichlorobenzene and 1,4-dichlorobenzene,desorbed by gas chromatography-mass spectrometry simultaneous determination of the amount of internal standard added to improve the sensitivity of the method of sodium sulfate,optimize and validate detection methods. 1,2-dichlorobenzene and 1,4-dichlorobenzene in a good linear relationship in a certain concentration range,detection limit is 0. 01 μg / L,the recoveries and relative standard deviations were well in line with the analysis test quality control requirements.