改良砷铈催化分光光度法测定水中碘
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摘要
目的建立快速简单的水中碘含量测定方法。方法使用尿碘低砷试剂,保持亚砷酸加入量不变,硫酸铈铵加入量提高到0.40 ml,反应时间为13～15 min,波长400 nm处比色。结果水中碘的线性范围为0～100μg/L,相关系数为0.9996～1.000,方法检出限为0.96μg/L,加标回收率为99.2%～100.4%,精密度(RSD)为0.19%～0.64%。使用本法和考核指定的标准方法同时测定水碘质控样品,结果差异无统计学意义(t_1=1.531,P_1>0.05;t_2=1.466,P_2>0.05;t_3=1.069,P_3>0.05)。结论改良的砷铈催化分光光度法,操作简单,线性范围宽,精密度和准确性均能满足水中碘测定要求。
Objective In order to establish a rapid and simple method for determining iodine in water.Methods The dosage of arsenite was kept constant by using urinary iodine and low arsenic reagent. The dosage of ammonium ceric sulfate was increased to 0.40 ml, the reaction time was 13-15 min, and the colorimetric wavelength was 400 nm.Results The linear range of iodine in water is 0-100 ug/L, the correlation coefficient is 0.9996-1.000, the detection limit is 0.96 ug/L, the recovery of standard addition is 99.2%-100.4%, and the precision(RSD) is 0.19%-0.64%. Simultaneous determination of water iodine quality control samples by this method and the standard method specified by the examination showed no significant difference(t_1=1.531, P_1>0.05. t_2=1.466, P_2>0.05. t_3=1.069, P_3>0.05).Conclusion The modified arsenic-cerium catalytic spectrophotometry has the advantages of simple operation, wide linear range, precision and accuracy, which can meet the requirements of iodine determination in water.
Objective In order to establish a rapid and simple method for determining iodine in water.Methods The dosage of arsenite was kept constant by using urinary iodine and low arsenic reagent. The dosage of ammonium ceric sulfate was increased to 0.40 ml, the reaction time was 13-15 min, and the colorimetric wavelength was 400 nm.Results The linear range of iodine in water is 0-100 ug/L, the correlation coefficient is 0.9996-1.000, the detection limit is 0.96 ug/L, the recovery of standard addition is 99.2%-100.4%, and the precision(RSD) is 0.19%-0.64%. Simultaneous determination of water iodine quality control samples by this method and the standard method specified by the examination showed no significant difference(t_1=1.531, P_1>0.05. t_2=1.466, P_2>0.05. t_3=1.069, P_3>0.05).Conclusion The modified arsenic-cerium catalytic spectrophotometry has the advantages of simple operation, wide linear range, precision and accuracy, which can meet the requirements of iodine determination in water.
引文
[1] GB/T5750-2006生活饮用水标准检验方法[S].
[2] 李卫东,徐署东,赵立胜. 硫氰酸铁-亚硝酸盐催化分光光度法测定水中碘 [J] .安徽预防医学杂志,2014,20(4):241-244.
[3] 左书梅,张晓燕,杨立学,等.ICP-MS测定生活饮用水中碘含量[J] .医学动物防制,2014,30(12):1374-1375,1390.
[4] 张慧敏,黎雪慧,刘桂华,等.电感耦合等离子体质谱技术测定痕量碘方法研究[J] .中国卫生检验杂志,2014,24(4):493-495.
[5] 方秀梅,赵会生,闫萍.电感耦合等离子体质谱(ICP-MS)法测定水中碘含量效果评价[J].中国地方病防治杂志,2015,30(3):190-191.
[6] 王云,张国平,吴婷婷,等.电感耦合等离子体质谱法与硫酸铈催化法测定水碘的方法比较 [J].中国卫生检验杂志,2016,26(17):2452-2453,2467.
[7] 宋月,王小静,徐峰.饮用水中痕量碘的离子色谱积分安培测定法 [J].环境与健康杂志,2013,30(11):1015-1016.
[8] 李仁勇,王维.抑制型电导-离子色谱法快速测定矿泉水中碘离子 [J] .环境化学,2013,32(9):1821-1822.
[9] 赵庆武,刘志新,韩振杰,等.离子选择电极法测定生活饮用水中碘化物方法的研究 [J] .医学动物防制,2018,34(11):1122-1124.
[10] 李雪梅.在线萃取流动注射-火焰原子吸收法间接测定水中碘 [J] .江西化工,2010,(3):55-57.
[11] WS/T107.1-2016. 尿中碘的测定第一部分:砷铈催化分光光度测定方法 [S].
[12] 王海燕,刘列均,李淑华,等. 适合缺碘及高碘地区水碘检测的方法研究[J] .中国地方病学杂志,2007,26(3):333-336.
[13] WS/T107-2006. 尿中碘的砷铈催化分光光度测定方法 [S].
[2] 李卫东,徐署东,赵立胜. 硫氰酸铁-亚硝酸盐催化分光光度法测定水中碘 [J] .安徽预防医学杂志,2014,20(4):241-244.
[3] 左书梅,张晓燕,杨立学,等.ICP-MS测定生活饮用水中碘含量[J] .医学动物防制,2014,30(12):1374-1375,1390.
[4] 张慧敏,黎雪慧,刘桂华,等.电感耦合等离子体质谱技术测定痕量碘方法研究[J] .中国卫生检验杂志,2014,24(4):493-495.
[5] 方秀梅,赵会生,闫萍.电感耦合等离子体质谱(ICP-MS)法测定水中碘含量效果评价[J].中国地方病防治杂志,2015,30(3):190-191.
[6] 王云,张国平,吴婷婷,等.电感耦合等离子体质谱法与硫酸铈催化法测定水碘的方法比较 [J].中国卫生检验杂志,2016,26(17):2452-2453,2467.
[7] 宋月,王小静,徐峰.饮用水中痕量碘的离子色谱积分安培测定法 [J].环境与健康杂志,2013,30(11):1015-1016.
[8] 李仁勇,王维.抑制型电导-离子色谱法快速测定矿泉水中碘离子 [J] .环境化学,2013,32(9):1821-1822.
[9] 赵庆武,刘志新,韩振杰,等.离子选择电极法测定生活饮用水中碘化物方法的研究 [J] .医学动物防制,2018,34(11):1122-1124.
[10] 李雪梅.在线萃取流动注射-火焰原子吸收法间接测定水中碘 [J] .江西化工,2010,(3):55-57.
[11] WS/T107.1-2016. 尿中碘的测定第一部分:砷铈催化分光光度测定方法 [S].
[12] 王海燕,刘列均,李淑华,等. 适合缺碘及高碘地区水碘检测的方法研究[J] .中国地方病学杂志,2007,26(3):333-336.
[13] WS/T107-2006. 尿中碘的砷铈催化分光光度测定方法 [S].