| 分光光度法测定环境水中的微量锌 |
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| 引用本文： | 李永盼,耿芳.分光光度法测定环境水中的微量锌[J].山西能源与节能,2012(11):60-62. |
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| 作者姓名： | 李永盼 耿芳 |
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| 作者单位： | 石药集团中诺药业有限公司,河北石家庄,050000 |
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| 摘 要： | 研究了三元络合物Zn-SCN--RhB的高灵敏度显色反应体系,建立了光度法测定环境水中微量Zn（Ⅱ）的新方法。结果表明,在盐酸介质中,Zn-SCN--RhB络合物的表观摩尔吸光系数ε=2.1×104L.mol-1.cm-1,Zn（Ⅱ）的质量浓度在0μg/10 mL～5μg/10 mL范围内服从比尔定律,Zn2＋、SCN-和RhB＋三者的络合比为1∶4∶5。具有较高的灵敏度和较好的选择性,试验体系稳定,操作简单快速,可直接应用于环境水中微量锌的测定。
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| 关 键 词： | 罗丹明B 硫氢酸钾 分光光度法 Zn |
Micro Amounts of Zinc in Environmental Water Determination Method by Spectrophotometry |
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| LI Yong-pan
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GENG Fang.Micro Amounts of Zinc in Environmental Water Determination Method by Spectrophotometry[J].Shanxi Energy and Conservation,2012(11):60-62. |
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| Authors: | LI Yong-pan GENG Fang |
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| Affiliation: | (Solutia Pharmaceutical Co., Ltd. of Shijiazhuang Pharmaceutical Group, Shijiazhuang 050000, Hebei, China) |
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| Abstract: | Law Institute of the ternary complex of Zn-SCN--RhB high sensitivity of the color reaction system, the establishment of a new method for the spectrophotometric determination of the environmental trace of Zn （ Ⅱ }. The results showed that in hydrochloric acid, Zn-SCN--RhB the apparent molar absorption coefficient 8=2.1×10^4 L·mol^-l·cm^-1, Zn （II} mass concentration in the 0 μg/10 mL-5 Ixg/10 mLthe law was obeyed in the range and the three complexing ratio of Zn2＋, SCN- and RhB＋ is 1 ： 4 ： 5. This method has high sensitivity and good selectivity for the test system stability, simple operation and fast, can be directly applied to the determination of environmental trace zinc. |
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| Keywords: | RhB KSCN spectrophotometric Zn |
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