浊点萃取预富集火焰原子吸收光谱法测定水样中痕量镍
FAAS Determination of Trace Amount of Nickel in Water Samples with Cloud Point Extraction
摘 要
以1-(2-吡啶偶氮)-2-萘酚为络合剂,在pH 7.0,用Triton X-100非离子表面活性剂浊点萃取水样中痕量镍.表面活性剂相用硝酸-甲醇(1+9)混合液0.5 mL分散,所得溶液直接引入仪器进行火焰原子吸收测定,方法的检出限(3σ)为3.77×10-3mg·L-1,应用所提出方法测定了河水样品,测定结果的相对标准偏差(n=6)为2.98%.
浊点萃取
镍
1-(2-吡啶偶氮)-2-萘酚
Triton X-100
水样
Flame atomic absorption spectrometry (FAAS)
Cloud point extraction
Nickel
PAN
Triton X-100
Water sample
Abstract
Trace amount of Ni(Ⅱ) was extracted from water sample in the form of coordination complex with 1-(2-pyridylazo)-2-naphthol (PAN) at pH 7.0 by cloud point extraction with Triton X-100.The surfactant phase was dispersed in 0.5 mL of a mixture of conc.HNO3 and methanol in the ratio of 1 to 9 by volume,and the solution was introduced directly into the nebulizer for FAAS determination.Detection limit (3σ) of the method was found to be 3.77×10-3mg·L-1.The proposed method was used in the determination of nickel in a sample of river water,giving value of RSD′s (n=6) of 2.98%.
中图分类号 O657.31
所属栏目 工作简报
基金项目 国家自然科学基金资助项目(NO:20473057)
收稿日期 2006/11/19
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备注苏耀东(1947-),男,浙江海盐人,教授,博士生导师,主要研究方向为痕量分析.
引用该论文: SU Yao-dong,ZHU Yuan-yuan,HUANG Yan,GAN Li-hua. FAAS Determination of Trace Amount of Nickel in Water Samples with Cloud Point Extraction[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2008, 44(2): 123～124
苏耀东,朱圆圆,黄燕,甘礼华. 浊点萃取预富集火焰原子吸收光谱法测定水样中痕量镍[J]. 理化检验－化学分册, 2008, 44(2): 123～124
被引情况:
【1】赵永强,朱秀娟,刘志高,陈建钢,胡岗, "流动注射在线分离富集-火焰原子吸收光谱法测定水中镍(Ⅱ)",理化检验－化学分册 51, 787-789(2015)
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参考文献
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【2】梁沛,李静.浊点萃取技术在金属离子分离和富集以及形态分析中应用的进展[J].理化检验-化学分册,2006,42(7):582．
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【2】梁沛,李静.浊点萃取技术在金属离子分离和富集以及形态分析中应用的进展[J].理化检验-化学分册,2006,42(7):582．
【3】Tang A N,Jiang D Q,Yan X P.Cloud point extraction preconcentration for capillary electrophoresis of metal ions[J].Analytica Chimica Acta,2004,507:199．
【4】Jamshid L M,Ghasem K N.Development of a cloud point extraction and preconcentration method for Cd and Ni prior to flame atomic absorption spectrometric determination[J].Analytica Chimica Acta,2004,521:173．
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