[Spectrophotometric determination of iron using eriochrome cyanine R as extractant with phase-separation].
Spectrophotometric determination of iron by using eriochrome cyanine R as extractant and color-developing agent in organic solvents was studied. The complex was extracted by PEG phase from the water solutions of pH4.5-6.5 (NaAc-HAc). The maximum absorption of the complex is at 560 nm and the molar absorptivity is 5.36 x 10(4) L x mol(-1) x cm(-1). Beers law was obeyed in the range of 0-40 microg Fe. Iron and eriochrome cyanine R formed a stable complex with a molar ratio of 1:2. The proposed method has been applied to the determination of copper in aluminium alloys with satisfactory results.
Zhang
Z
Z
Department of Chemistry, Huaibei Coal Teacher's College, 235000 Huaibei.
Xie
Y
Y
Shi
Y
Y
D001557:Benzenesulfonates / Q000737:chemistry*; D028241:Camellia sinensis / Q000737:chemistry*; D007501:Iron / Q000032:analysis*; D052616:Solid Phase Extraction; D013053:Spectrophotometry / Q000379:methods*
D001557:Benzenesulfonates; C010332:solochrome cyanine R; D007501:Iron