title: [Simultaneous determination of trace amounts of iron(II), copper(I) and cobalt(II) in aloe by second derivative peak area spectrophotometry].
abstract: A new method for simultaneous determination of iron(II), copper(I) and cobalt(II) was established by second derivative peak area spectrophotometry in chromogenic system of 1,10-phenanthroline. The method could avoid disturbing by some ions. The accuracy and sensitivity were improved. There is a linear relationship in the range of 0.0-8.5 microg x mL(-1) for Fe(II); of 0.0-7.3 microg x mL(-1) for Cu(I); and of 0.0-5.9 microg x mL(-1) for Co(II). The method has been applied to simultaneous determination of iron(II), copper(I) and cobalt(II) in aloe with satisfactory results. The average recovery is 98.6%-102% and the RSD is 0.1%-0.2%. There is no remarkable difference between these results and those of ICP-AES method.
authors.affiliation: Department of Chemistry, Changchun Teachers College, Changchun 130032, China.
authors.forename: Hong-mei
authors.initials: HM
authors.lastname: Li
authors.forename: Li-hong
authors.initials: LH
authors.lastname: Su
authors.forename: Rui-zhan
authors.initials: RZ
authors.lastname: Chen
mesh_terms: D003035:Cobalt / Q000032:analysis*; D003300:Copper / Q000032:analysis*; D007501:Iron / Q000032:analysis*; D010618:Phenanthrolines / Q000737:chemistry; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods*; D013054:Spectrophotometry, Atomic / Q000379:methods
chemical_list: D010618:Phenanthrolines; D003035:Cobalt; D003300:Copper; D007501:Iron; C025205:1,10-phenanthroline