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建立了水中3种挥发性N-亚硝胺类化合物(N-亚硝基二乙胺,N-亚硝基二丙胺和N-亚硝基二丁胺)的吹扫捕集-气相色谱/质谱联用检测方法。结果表明,3种化合物标准曲线的相关系数r为0.997~0.999,相对标准偏差(RSD)小于8%。空白加标回收率为92.0%~108.0%,3种物质的检出限分别是0.79,0.15和0.10μg/L。同时运用该方法对上海不同地区自来水中的N-亚硝胺进行了检测。
In this paper, three kinds of volatile N-nitrosamines (N-nitrosodiethylamine, N-nitrosodipropylamine and N-nitrosodibutylamine) Mass spectrometry detection method. The results showed that the correlation coefficients r of the three compounds were between 0.997 and 0.999, and the relative standard deviations (RSDs) were less than 8%. The spiked recoveries ranged from 92.0% to 108.0%. The detection limits of the three substances were 0.79, 0.15 and 0.10 μg / L, respectively. At the same time, this method was used to test N-nitrosamines in tap water in different areas of Shanghai.