摘要
研究了用Ｄ４０１号螯合树脂交换分离富集精制食盐水中微量钙及用分光光度法测定钙含量的方法．在ｐＨ１．５～２．５的柠檬酸介质中，２５ｍＬ体积内钙含量在０．５～７．０μｇ范围内符合比耳定律．回收率为９７．０％～１０６．０％，灵敏度（ＲＳＤ）≤３．３％．
The method of the D401 chelating resin exchange pre concentration of calcium in refined table salt solution is studied.And the optimum conditions for the determination of microamounts of calcium in preconcentrated solution by spectrophotometry are also discussed.In a citric acid buffer medium of pH1.5～2.5,beer’s law is obeyed for 0.5～7.0μg of calcium in 25mL solution.The recoveries are 97.0%～106.0% and the RSD≤3.3%.
出处
《焦作工学院学报》
1998年第5期384-387,共4页
Journal of Jiaozuo Institute of Technology(Natural Science)
关键词
螯合树脂
分光光度法
钙
测定
chelating resin
spectrophotometry
calcium
