title: Application of rapid cloud point extraction method for trace cobalt analysis coupled with spectrophotometric determination.
abstract: In this work, the analytical performance of conventional spectrophotometer was improved through the coupling of effective preconcentration method with spectrophotometric determination. Rapidly synergistic cloud point extraction (RS-CPE) was used to pre-concentrate ultra trace cobalt and firstly coupled with spectrophotometric determination. The developed coupling was simple, rapid and efficient. The factors influencing RS-CPE and spectrophotometer were optimized. Under the optimal conditions, the limit of detection (LOD) was 0.6μgL(-1), with sensitivity enhancement factor of 23. The relative standard deviation (RSD) for seven replicate measurements of 50μgL(-1) of cobalt was 4.3%. The recoveries for the spiked samples were in the acceptable range of 93.8-105%.
authors.affiliation: College of Pharmacy and Chemistry, Dali University, Dali, Yunnan 671000, China. wenxdong129@163.com
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Wen
authors.forename: Lei
authors.initials: L
authors.lastname: He
authors.forename: Chunsheng
authors.initials: C
authors.lastname: Shi
authors.forename: Qingwen
authors.initials: Q
authors.lastname: Deng
authors.forename: Jiwei
authors.initials: J
authors.lastname: Wang
authors.forename: Xia
authors.initials: X
authors.lastname: Zhao
mesh_terms: D000042:Absorption; D000180:Acrylic Resins / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry; D003035:Cobalt / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007477:Ions; D000442:Octanols / Q000737:chemistry; D017830:Octoxynol; D011092:Polyethylene Glycols / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods*; D013997:Time Factors
chemical_list: D000180:Acrylic Resins; D002614:Chelating Agents; D007477:Ions; D000442:Octanols; D012997:Solvents; C010504:polyacrylonitrile; D003035:Cobalt; D011092:Polyethylene Glycols; D017830:Octoxynol; C010615:Nonidet P-40
keywords: Cobalt; Coupling; Preconcentration; Rapidly synergistic cloud point extraction; Spectrophotometer