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浊点萃取-分光光度法测定水中痕量镍

DOI: 10.11830/ISSN.1000-5013.2008.04.0571

Keywords: 浊点萃取,, 混合表面活性剂, 分光光度法

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Abstract:

采用十二烷基磺酸钠(SDS)和Triton X-100的混合表面活性剂,以1-(2-吡啶偶氮)-2-萘酚(PAN)为络合剂,加入电解质NaCl溶液,通过紫外-可见分光光度法测定水中痕量镍.在室温下,考察影响浊点萃取、分离和富集金属离子镍的影响因素及适宜的反应条件.结果表明,在饱和NaCl的加入量为5.5 mL,体积分数为0.1%的PAN加入量为0.125 mL,SDS和Triton X-100的摩尔比在0.38~1.39时,所形成的体系对Ni2+-PAN络合物具有较好的萃取效果.最佳条件下,方法的线性范围为0.1~1.0 mg.L-1,相关系数R2=0.999 8,检测限为18.9μg.L-1,镍的加标回收率达97%~99%,相对标准偏差为2%~4%.

References

[1]  LI J L, CHEN B H. Equilibrium partition of polycyclic aromatic hydrocarbons in a cloud-point extraction process [J]. Journal of Colloid and Interface Science, 2003, (2):625-632.doi:10.1016/S0021-9797(03)00403-X.
[2]  赵国玺, 朱涉瑶. 表面活性剂作用原理 [M]. 北京:中国轻工业出版社, 2003.264.
[3]  CLESIA C N, MARCO A A. Cloud point formation based on mixed micelles in the presence of electrolytes for cobalt extraction and preconcentration [J]. Talanta, 2003, (6):759-768.doi:10.1016/S0039-9140(03)00367-9.
[4]  CASERO I, SICILIA D, RUBIO S. Acid-induced phase cloud point separation approach using anionic surfactants for the extraction and preconcentration of organic compounds [J]. Analytical Chemistry, 1999.4519-4526.
[5]  赵国玺. 表面活性剂物理化学 [M]. 北京:北京大学出版社, 1984.268-270.
[6]  戚文彬. 表面活性剂与分析化学 [M]. 北京:中国计量出版社, 1988.167-168.
[7]  BERGER W, MCCARTY H, SMITH R K. Environmental laboratory data evaluation [M]. Schenectady:Genium Publishing Corporation, 1996.2-11.
[8]  PALEOLOGOS E K, GIOKAS D L, KARAYANNIS M I. Micelle-mediated separationand cloud-point extraction [J]. Trends in Analytical Chemistry, 2005(5):426-436.doi:10.1016/j.trac.2005.01.013.
[9]  GIOKAS D L, EKSPERIANDOVA L P, BLANK A B. Comparison and evaluation of cloud point extraction and low-temperature directed crystallization as preconcentration tools for the determination of trace elements in environmental samples [J]. Analytica Chimica Acta, 2004, (1):51-58.doi:10.1016/S0003-2670(03)00175-2.
[10]  CHEN J, TAO K C. Determination of cobalt and nickel in water samples by flame atomic absorption spectrometry after cloud point extraction [J]. Analytica Chimica Acta, 2001, (2):325.
[11]  MINUTH T, THOMMES J, KULA M R. Extraction of cholesterol oxidase from Nocardia rhodochrous using a nonionic surfactant-based aqueous two-phase system [J]. Biotechnology and Applied Biochemistry, 1995.107-110.

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