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目的:直饮水中亚硝酸盐含量测定的若干探讨,为直饮水中亚硝酸盐含量标准提供参考依据,为直饮水中亚硝酸盐含量测定提供检测依据,并将该方法应用于各类直饮水中的亚硝酸盐含量测定,有效指导人们安全饮水。方法:参考GB/T8538-1995《饮用天然矿泉水检验方法》和GB/T5750-2006《生活饮用水标准检验方法》,优化方法中一些测定条件,对直饮水中亚硝酸盐进行分析测定。结果:在0.00～9.90×10-2 mg/L浓度范围内呈线性关系,工作曲线y=2.2134x+0.0007,相关系数为0.9998,最低检出浓度为6.60×10-4 mg/L,相对标准偏差为0.96%～16.0%,加标回收率93.6%～122%。结论:该方法适合于直饮水中亚硝酸盐含量的测定,并能为直饮水中亚硝酸盐标准提供参考依据,为相关监管部门提供相应的检测依据。
Objective: To explore the determination of nitrite content in drinking water, to provide a reference for the standard of nitrite content in drinking water, to provide the basis for the determination of nitrite content in drinking water, and to apply this method to all kinds of drinking water Determination of nitrite in the effective guidance of people safe drinking water. Methods: Reference to GB / T8538-1995 “drinking natural mineral water test method” and GB / T5750-2006 “drinking water standard test method” to optimize the method of determination of some of the conditions, direct drinking water analysis of nitrite. Results: The linear relationship was obtained in the concentration range of 0.00-9.90 × 10-2 mg / L. The working curve y = 2.2134x + 0.0007, the correlation coefficient was 0.9998, the minimum detectable concentration was 6.60 × 10-4 mg / L, The deviations ranged from 0.96% to 16.0%, and the spiked recoveries ranged from 93.6% to 122%. Conclusion: This method is suitable for the determination of nitrite content in drinking water and can provide a reference for the standard of nitrite in drinking water, and provide the relevant regulatory authorities with the basis for detection.