【摘要】 目的:自来水厂消毒工艺过程中产生的氯仿、四氯化碳对人的健康有严重的危害,需建立灵敏度高的检测方法监测饮用水中的氯仿和四氯化碳。方法:建立了顶空采样用质谱作为检测器并采用选择离子监测的方法检测饮用水中的氯仿和四氯化碳。结果:氯仿和四氯化碳浓度在0~80μg/L范围内,线性较好,相关系数分别为0.9993和0.9991;氯仿的最低检出浓度为0.05μg/L,四氯化碳的最低检出浓度为0.03μg/L,跟国标方法相比降低了两个数量级,灵敏度大大提高。结论:实验表明本方法操作简单,准确度和精密度较高均符合检测要求,回收率范围93.6%~106.4%,RSD为5.0%~7.5%之间。更多还原

【Abstract】 Objective:The chloroform and tetrachloride carbon brought by the processes of sterilizing by the tap water factory are harmful for people’s health,we need to establish a method of high sensitivity to detect the determination of chloroform and tetrachloride carbon in drinking water.Method:A method has been established for the determination of chloroform and tetrachloride carbon in drinking water by headspace gas chromatography-mass spectrometry.Results:The better linear range of chloroform and tetrachloride carbon were 0~80 μg/L,each correlation coefficient were 0.9993 and 0.9991,the lowest detection limit of chloroform and tetrachloride carbon were 0.05 μg/L and 0.03 μg/L respectively,the sensitivity was increased greatly.[WTHZ]Conclusion:This experiment indicated that the operating processes of this method is easy,the precisions and accuracies all accorded with requirements of determination,the range of recovery rate is 93.6%~106.4% and the range of RSD is 5.0%~7.5%.更多还原