摘要
目的探讨硫酸铈铵分光光度法测定水中碘化物的应用。方法应用硫酸铈铵分光光度法,在0~20和0~200μg/L碘浓度范围内测定末梢水及水源水碘含量,从该方法的线性范围、检出限、精密度、准确度等方面进行效果验证。结果0~20和0~200μg/L碘浓度范围内,线性相关系数的绝对值均>0.9990,检出限分别为0.18和1.02μg/L;低、中、高碘浓度末梢水和水源水的变异系数均<5%。0~20μg/L碘浓度范围内,末梢水和水源水的加标回收率范围分别为90.33%~110.46%、92.21%~102.82%;0~200μg/L碘浓度范围内,末梢水和水源水的加标回收率范围分别为90.14%~102.62%、91.36%~106.18%。对国家一级标准物质GBW09113g和GBW09114g进行检测,水碘测定结果均在标准物质给定值范围内。结论硫酸铈铵分光光度法线性范围广,准确度高,精密度好,适宜基层广泛应用。
Objective To study the application of ammonium cerium sulfate spectrophotometry for determination of iodide in water.Methods Ammonium cerium sulfate spectrophotometry was used to determine the iodine content of tap water and source water in the range of 0-20 and 0-200μg/L iodine concentration.The effect of the method was verified in terms of linear range,detection limit,precision and accuracy.Results In the range of 0-20 and 0-200μg/L iodine concentration,the absolute values of linear correlation coefficients were>0.9990;the detection limits were 0.18 and 1.02μg/L,respectively;the coefficient of variation of low,medium and high iodine concentrations in tap water and source water was less than 5%.In the range of 0-20μg/L iodine concentration,the spiked recovery rates of tap water and source water were 90.33%-110.46%and 92.21%-102.82%,respectively;in the range of 0-200μg/L iodine concentration,the spiked recovery rates of tap water and source water were 90.14%-102.62%and 91.36%-106.18%,respectively.The national first level standard materials GBW09113g and GBW09114g were tested,and the results of water iodine determination were within the given range of the standard materials.Conclusion Ammonium cerium sulfate spectrophotometry has a wide linear range,high accuracy,and good precision,making it suitable for widespread application in grassroots areas.
作者
刘婷婷
王海燕
徐署东
丁刚
许娴
谢继安
王开倩
李卫东
Liu Tingting;Wang Haiyan;Xu Shudong;Ding Gang;Xu Xian;Xie Ji'an;Wang Kaiqian;Li Weidong(Physical and Chemical Laboratory,Anhui Center for Disease Control and Prevention,Hefei 230601,China;National Institute of Nutrition and Health,Chinese Center for Disease Control and Prevention,Beijing 102206,China)
出处
《中华地方病学杂志》
CAS
北大核心
2023年第10期838-841,共4页
Chinese Journal of Endemiology
关键词
硫酸铈铵分光光度法
饮用水
水源水
碘化物
Ammonium cerium sulfate spectrophotometry
Drinking water
Source water
Iodide
