A method of spectrophotometric determination of micro amounts of platinum with MPT was proposed.Beers law is obeyed in the range of 0～3.7mg·L1Pt（Ⅳ）,an apparent molar absorptivity of ε682.0=5.46×104L...A method of spectrophotometric determination of micro amounts of platinum with MPT was proposed.Beers law is obeyed in the range of 0～3.7mg·L1Pt（Ⅳ）,an apparent molar absorptivity of ε682.0=5.46×104L·mol-1·cm-1.The method has been applied to the determination of platinum in minerals and catalysts with satisfactory results.展开更多
A new method of spectrophotometric determination of copper with N-heptyl-N’-(sodium p-aminaobenzenesulfonate) thiourea(HABST) has been reported. And the optimum conditions has been studied. In HAc-NaAc buffer solutio...A new method of spectrophotometric determination of copper with N-heptyl-N’-(sodium p-aminaobenzenesulfonate) thiourea(HABST) has been reported. And the optimum conditions has been studied. In HAc-NaAc buffer solution at pH4.5～6.0, Cu 2+ HABST forms a 1:3 stable blue water soluble complex with an apparent molar absorptivity of ε 347.6 =4.5110 4L·mol -1 ·cm -1 . Beer’s law is applicable in the range of 5～μg/25ml Cu 2+ . It has been used to the determination of copper in biological samples with satisfactory results and ercoveries.展开更多
文摘A method of spectrophotometric determination of micro amounts of platinum with MPT was proposed.Beers law is obeyed in the range of 0～3.7mg·L1Pt（Ⅳ）,an apparent molar absorptivity of ε682.0=5.46×104L·mol-1·cm-1.The method has been applied to the determination of platinum in minerals and catalysts with satisfactory results.
文摘A new method of spectrophotometric determination of copper with N-heptyl-N’-(sodium p-aminaobenzenesulfonate) thiourea(HABST) has been reported. And the optimum conditions has been studied. In HAc-NaAc buffer solution at pH4.5～6.0, Cu 2+ HABST forms a 1:3 stable blue water soluble complex with an apparent molar absorptivity of ε 347.6 =4.5110 4L·mol -1 ·cm -1 . Beer’s law is applicable in the range of 5～μg/25ml Cu 2+ . It has been used to the determination of copper in biological samples with satisfactory results and ercoveries.
