用铜试剂—甲基异丁基甲酮萃取原子吸收法测定水中痕量铜、锌和镉

• 作 者: 倪平英 胡丰 张元柱 王瑞陵 刘群柱
• 机 构: 本所三室,本所三室,本所三室,本所三室,本所三室,
• 出 处: 盐湖科技资料
• 发表日期: 1977年Z1期
• 关键词: 铜试剂 痕量铜 甲基异丁基甲酮 原子吸收法测定 共存离子 原子吸收 试样溶液 测量条件 重蒸馏水 有机相

研究了用铜试剂—甲基异丁基甲酮萃取,原子吸收测定水中痕量铜、锌和镉的方法。研究得出了萃取程序和较佳的测量条件。萃取前向标准和试样溶液加入氯化钠,可减小共存离子干扰,使测定误差降到±5%以内。当样品溶液经萃取被浓缩10倍时,测定铜、锌和镉的灵敏度可分别提高到10、1和1PPb/1%吸收。萃取时水相和有机相体积为300∶10时,它的萃取度均可达99%。

The method of copper reagent - methyl isobutyl ketone extraction and atomic absorption spectrometry for the determination of trace copper, zinc and cadmium in water was studied. The study obtained the extraction procedure and the better measurement conditions. Adding sodium chloride to the standard and the sample solution before extraction can reduce the interference of coexisting ions and reduce the measurement error to within ± 5%. Sensitivity of copper, zinc and cadmium can be increased to 10, 1 and 1 ppb / 1% respectively when the sample solution is concentrated 10-fold by extraction. Extraction of the aqueous phase and the organic phase volume of 300:10, its degree of extraction up to 99%.