Alizarin red S(ARS) causes a sharp incision in 0.1 mol/L KBr. In the presence of Zn 2+ , the incision depth of ARS decreased and a new incision of Zn-ARS coordination compound appeared. A second order differential sim...Alizarin red S(ARS) causes a sharp incision in 0.1 mol/L KBr. In the presence of Zn 2+ , the incision depth of ARS decreased and a new incision of Zn-ARS coordination compound appeared. A second order differential simple oscillographic voltammetric method for determination of Zn 2+ was developed. The method is applied to the determination of zinc gluconate in tablet. The linear range of Zn 2+ was 2.0×10 -7 ～8.6×10 -6 mol/L,detection limit 1×10 -7 mol/L, and RSD for determinations of 4.2×10 -6 mol/L Zn 2+ ( n=7 ) was 2.4%.展开更多
A new method of oscillographic chronopotentiometry at silver disk electrode was investigated. By using it, a series of ions such as Pb, In, Cr, Tl, Bi etc. were determined. The detection limits are two or three orders...A new method of oscillographic chronopotentiometry at silver disk electrode was investigated. By using it, a series of ions such as Pb, In, Cr, Tl, Bi etc. were determined. The detection limits are two or three orders of magnitude lower than those by oscillographic chronopotentiometry at mercury electrode. The proposed method is characterized by fine sensitivity, stable oscillogram and no mercury. The research on the mechanism of this method shows that these achievements are caused by the characterristics of silver electroxidation and electroreduction and the oscillographic chronopotentiometry (OC).展开更多
A new method of oscillographic chronopotentiometry at silver disk electrode for the determination was initially investigated and established. By using it, we determined a series of ions. The detection limits were decr...A new method of oscillographic chronopotentiometry at silver disk electrode for the determination was initially investigated and established. By using it, we determined a series of ions. The detection limits were decreased two or three orders of magnitude of that for the oscillographic chronopotentiometry at mercury electrode. This method was characterized by fine sensitivity, stable oscillogram and was not used for mercury. The research on mechanism of this method showed that these achievements were caused by the characteristics of silver electrooxidation and electroreduction and the A.C. oscillographic chronopotentiometry(ACOC).展开更多
文摘Alizarin red S(ARS) causes a sharp incision in 0.1 mol/L KBr. In the presence of Zn 2+ , the incision depth of ARS decreased and a new incision of Zn-ARS coordination compound appeared. A second order differential simple oscillographic voltammetric method for determination of Zn 2+ was developed. The method is applied to the determination of zinc gluconate in tablet. The linear range of Zn 2+ was 2.0×10 -7 ～8.6×10 -6 mol/L,detection limit 1×10 -7 mol/L, and RSD for determinations of 4.2×10 -6 mol/L Zn 2+ ( n=7 ) was 2.4%.
文摘A new method of oscillographic chronopotentiometry at silver disk electrode was investigated. By using it, a series of ions such as Pb, In, Cr, Tl, Bi etc. were determined. The detection limits are two or three orders of magnitude lower than those by oscillographic chronopotentiometry at mercury electrode. The proposed method is characterized by fine sensitivity, stable oscillogram and no mercury. The research on the mechanism of this method shows that these achievements are caused by the characterristics of silver electroxidation and electroreduction and the oscillographic chronopotentiometry (OC).
文摘A new method of oscillographic chronopotentiometry at silver disk electrode for the determination was initially investigated and established. By using it, we determined a series of ions. The detection limits were decreased two or three orders of magnitude of that for the oscillographic chronopotentiometry at mercury electrode. This method was characterized by fine sensitivity, stable oscillogram and was not used for mercury. The research on mechanism of this method showed that these achievements were caused by the characteristics of silver electrooxidation and electroreduction and the A.C. oscillographic chronopotentiometry(ACOC).
