期刊文献+

离子液体双水相萃取分光光度法测定铜 被引量:19

Extraction spectrophotometric determination of copper in ionic liquid aqueous two-phase system
下载PDF
导出
摘要 建立了由亲水性离子液体四氟硼酸1-丁基-3-甲基咪唑([Bmim]BF4)和NaH2PO4形成的双水相体系萃取光度法测定铜的新方法。研究了离子液体用量、溶液酸度、铬天青S、盐的加入量对测定的影响及共存物质对Cu2+萃取测定的影响及消除。在pH5.0~8.0范围内,离子液体双水相中铬天青S及Cu2+形成的络合物有较高的吸光度,络合比为3:1,络合物最大吸收波长位于590nm,表观摩尔吸光系数ε=5.16×10^4L·mol^-1·cm^-1,Cu2+量的线性范围为0~4.0μg/mL。方法用于铝合金标准样品中铜的测定,结果与认定值相符。使用后的离子液体经过简单处理可以重复使用。 A novel method of extraction spectrophotometric determination of copper in ionic liquid aqueous two-phase system (ATPS) formed by a hydropilic ionic liquid 1-butyl-3-methylimidazoliumtet- rafluoroborate([Bmim]BF4) and NaH2PO4 was developed. The effects of ionic liquid dosage, solution acidity,the dosages of chrome azurol S, salt and elimination of interference form other coexistence substances on the extraction determination of copper were studied. In the ionic liquid aqueous twophase system of pH 5.0--8.0,the complex formed by chrome axurol S and Cu2+ had high absorbance with the maximum absorption of 590 nm. Beer's law was obeyed in the range of 0--4.0 μg/mL for Cu2+ with the apparent molar absorptivity of ε=5.16×10^4L·mol^-1·cm^-1. The complex ratio of chrome azurol S and Cu2+ was 3 : 1. The method has been applied to the determination of copper in standard aluminium alloy and the results were in agreement with the certified values. The ionic liquid could be repeatedly used after simple treatment.
出处 《冶金分析》 CAS CSCD 北大核心 2008年第6期29-32,共4页 Metallurgical Analysis
基金 安徽省教育厅自然科学基金重点项目(KJ2008A123)
关键词 离子液体 双水相 萃取 分光光度法 ionic liquid aqueous two-phase extraction copper spectrophotometry
  • 相关文献

参考文献7

  • 1Gutowski E K, Broker A G, Rogers D R, et al. Controlling the aqueous miscibility of ionic liquids..Aqueous biphasic systems of water-miscible ionic liquids and water-structuring salts for recycle, metathesis, and separations[J]. J. Am Chem Soc. , 2003,125: 6632-6636.
  • 2Seddon K R, Stark A, Torres M J. Influence of chloride, water, and organic solvents on the physical properties of ionic liquids [J]. Pure Appl. Chem. ,2000,72 (12):2275-2280.
  • 3He Chiyang, Li Shehong, Liu Huwei, et al. Extraction of testosterone and epitestosterone in human urine using aqueous biphasic system consisting of ionic liquid and salt[J]. J. chromatogr. A, 2005,1082 : 143-148.
  • 4刘庆芬,胡雪生,王玉红,杨屏,夏寒松,余江,刘会洲.离子液体双水相萃取分离青霉素[J].科学通报,2005,50(8):756-759. 被引量:71
  • 5邓凡政,郭东方.离子液体双水相体系萃取分离牛血清白蛋白[J].分析化学,2006,34(10):1451-1453. 被引量:61
  • 6Cull S G, Holbrey J D, More V, et al. Room-temperature ionic liquids as replacements for organic solvents in multiphase bioprocess operations [J]. Biotechnol Bioeng, 2000,69 (2) : 227-230.
  • 7Gutowski E K, Broker A G, Rogers D R,et al. Controlling the aqueous miscibility of ionic liquids:Aqueous biphasic systems of water-miscible ionic liquids and water-structuring salts for recycle,metathesis,and separations[J]. J. Am Chem Soc., 2003,125 : 6632- 6636.

二级参考文献18

  • 1Chen J, Liu H Z, Wang B, et al. Application of spontaneous suction phase-dispersing(SSPD) extractors in the extraction of penicillin G. Appl Biochem Biotechnol, 2002, 97: 660-671
  • 2Guan Y X, Zhu Z Q, Mei L H. Technical aspects of extractive purification of penicillin fermentation broth by aqueous two-phase partitioning. Sep Sci Technol, 1996, 31(18): 2589-2597
  • 3Seddon K R. Ionic liquids for clean technology. J Chem Tech Biotechnol, 1997, 68: 351-356
  • 4Wilkes J S, Zaworotko M J. Air and water stable 1-ethyl-3-methyllimidazolium based ionic liquid. J Chem Soc Chem Commun, 1992, 13: 965-967
  • 5Cull S G, Holbrey J D, More V, et al. Room-temperature ionic liquids as replacements for organic solvents in multiphase bioprocess operations. Biotechnol Bioeng, 2000, 69(2 ): 227-233
  • 6Gutowski E K, Broker A G, Rogers D R, et al . Controlling the aqueous miscibility of ionic liquids: Aqueous biphasic systems of water-miscible ionic liquids and water-structuring salts for recycle, metathesis, and separations. J Am Chem Soc, 2003, 125: 6632- 6633
  • 7Varma R S, Namboodiri V V. An expeditious solvent-free route to ionic liquids using microwaves. Chem Commun, 2001, 643-644
  • 8Seddon K R, Stark A, Torres M J. Influence of chloride, water, and organic solvents on the physical properties of ionic liquids. Pure Appl Chem, 2000, 72(12): 2275-2287
  • 9LiuQingfen(刘庆芬) YuJiang(余江) HuXuesheng(胡雪生) XiaHansong(夏寒松) LiuHuizhou(刘会洲).Extractive separation of penicillin with ionic liquids aqueous two—phase[J].科学通报,2005,50:756-759.
  • 10Seddon K R.J.Chem.Tech.Biotechnol.,1997,68:351~ 356

共引文献97

同被引文献572

引证文献19

二级引证文献80

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部