液相色谱/串联质谱法测定水中8种亚硝胺方法优化研究
Optimization of method for determination of 8 nitrosamines in water by liquid chromatography and tandem mass spectrometry
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摘要: 本文使用液相色谱串联质谱法测定水中的8种亚硝胺类化合物,研究了样品的pH值、保存时间和离子源的选择对测定的影响.样品可采用固相萃取或直接进样的方式,使用内标法定量,液相色谱串联质谱法分析.经优化,各组分的响应良好,线性方程相关系数均大于0.995.进样量为10 μL时,固相萃取法的检出限为5.47-8.24 ng·L-1,直接进样法的检出限为1.01-1.12 μg·L-1.Abstract: In this study, eight nitrosamines in water were determined by liquid chromatograpHy-tandem mass spectrometry. The effect of the pH, storage time and ion source selection on the assay was discussed. The samples can be determined by solid pHase extraction or direct injection, and quantified by internal standard method. Using liquid chromatograpHy tandem mass spectrometry, the response of each component was good, and the linear equation correlation coefficient was greater than 0.995. Liquid chromatograpHy tandem mass spectrometry has high sensitivity, good selectivity, fast and accurate. When the injection volume is 10 μL, the detection limit of solid pHase extraction is 5.47-8.24 ng·L-1, and the detection limit of direct injection is 1.01-1.12 μg·L-1.
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[1] 黄理纳, 李函珂,蚁乐洲,等.HPLC-APCI-MS/MS法测定与口接触玩具及儿童用品中14种可迁移N-亚硝胺及可N-亚硝化物质[J]. 质谱学报, 2016,37(5):453-464. HUANG L N, LI H K, YI L Z,et al. Determination of 14 Migrations of N-Nitrosamines and N-Nitrosatable Substances in Toys and Children's Products by HPLC-APCI-MS/MS[J]. Journal of Chinese Mass Spectrometry Society, 2016,37(5):453-464(in Chinese).
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