| ABTT浊点萃取-分光光度法测定废水中的痕量镍* |
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| 引用本文： | 王慕华,张春牛,郑云法,张晓燕.ABTT浊点萃取-分光光度法测定废水中的痕量镍*[J].环境工程,2011,29(5). |
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| 作者姓名： | 王慕华 张春牛 郑云法 张晓燕 |
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| 作者单位： | 浙江丽水学院化学系,浙江丽水,323000 |
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| 基金项目： | 浙江省教育厅科研计划项目(Y201018676) |
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| 摘 要： | 利用非离子表面活性剂Triton X-114在温度高于其浊点时形成相分离行为,建立了浊点萃取-分光光度法测定水溶液中痕量镍的新方法,探讨优化了以1-偶氮苯-3-噻唑-三氮烯(ABTT)为显色剂,Triton X-114浊点萃取富集痕量镍的实验条件。在最大吸收波长为λ=540 nm外,其表观摩尔吸光系数为8.064×105 L/(mol.cm),线性范围为0～0.35μg/mL,相关系数为0.9990。在优化的实验条件下,进行了痕量镍的分析,加标回收率为97.9%～102.1%,应用于水溶液中痕量镍的测定,结果令人满意。
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| 关 键 词： | 浊点萃取 分光光度法 镍 |
DETERMINATION OF TRACE NICKEL IN WASTEWATER BY SPECTROPHOTOMETRY WITH ABTT CLOUD POINT EXTRACTION |
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| Wang Muhua Zhang Chunniu Zheng Yunfa Zhang Xiaoyan.DETERMINATION OF TRACE NICKEL IN WASTEWATER BY SPECTROPHOTOMETRY WITH ABTT CLOUD POINT EXTRACTION[J].Environmental Engineering,2011,29(5). |
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| Authors: | Wang Muhua Zhang Chunniu Zheng Yunfa Zhang Xiaoyan |
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| Institution: | Wang Muhua Zhang Chunniu Zheng Yunfa Zhang Xiaoyan (Department of Chemistry,Lishui University,Lishui 323000,China) |
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| Abstract: | A new method utilizing non-ionic surfactant of Triton X-114,which can be separated into two phases by heating to its cloud point,was developed to extract trace nickel in wastewater samples.The effects of experimental conditions of Triton X-114 as surfactant and 1-azobenzene-3-thiazoly-triazene(ABTT) as complexing agent on cloud point extraction(CPE),were discussed.The apparent molar absorptivity of the complex is 8.064×105 L/(mol·cm) at 540nm(λmax),Beer's law was obeyed for nickel in the range of 0~0.35μg/mL with correlation coefficient 0.9990.Under the optimal experiment conditions,the recovery rate of nickel was 97.9%~102.1%.The method has been applied to the direct determination of nickel in wastewater samples with satisfactory results. |
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| Keywords: | cloud point extraction spectrophotometry trace nickel |
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