The electrochemical behavior of ortho-phenylphenol （OPP） at a disposable electrode （an improved wax-impregnated graphite electrode） in the presence of sodium dodecyl sulfate （SDS） was studied for the first time....The electrochemical behavior of ortho-phenylphenol （OPP） at a disposable electrode （an improved wax-impregnated graphite electrode） in the presence of sodium dodecyl sulfate （SDS） was studied for the first time. The results demonstrated that the electrocatalytic oxidation process of OPP was accompanied with two-charge-two-proton transference. The electronic transmission coefficient （a） and diffusion coefficient （DR） for OPP were calculated to be 0.8126 and 3.61× 10^-2 cm2/s, respectively. The electrochemical signal was apparently improved by SDS at the disposable electrode and the oxidative peaks current was proportional to the concentration of OPP over the range from 1.0 ×10^-9 to 4.0 × 10^-6 mol/L with the detection limit of 8.7× 10^-10 mol/L. This novel and highly sensitive method can be successfully applied to detect OPP in the orange rind sample.展开更多
A sub-picomole level topotecan hydrochloride determination method was first proposed using sodium dodecyl sulfate (SDS) as a sensitized reagent at a novel disposable electrode (an improved wax-impregnated graphite ele...A sub-picomole level topotecan hydrochloride determination method was first proposed using sodium dodecyl sulfate (SDS) as a sensitized reagent at a novel disposable electrode (an improved wax-impregnated graphite electrode).The effects of different kinds of surfactants on the electrochemical response to topotecan hydrochloride were examined.The results indicate the electrochemical signal was apparently improved by SDS.At optimal conditions,the oxidative peak current increased linearly with the logarithm of concentrations for topotecan hydrochloride in the ranges of 2.0 × 10-12 to 1.0 × 10-11 mol/L and 8.0 × 10-11 to 8.0 × 10-10 mol/L with a detection limit of 6.4 × 10-13 mol/L.The proposed method could be applied in determining topotecan hydrochloride in urine.展开更多
基金support from the National Natural Science Foundation of China (20705030, 20875081, 21075107 & 21005070)the National High Technology Research and Development Program of China (2009AA03Z331)the Natural Science Foundation of Yancheng Institute of Technology (XKY-2009009)
文摘The electrochemical behavior of ortho-phenylphenol （OPP） at a disposable electrode （an improved wax-impregnated graphite electrode） in the presence of sodium dodecyl sulfate （SDS） was studied for the first time. The results demonstrated that the electrocatalytic oxidation process of OPP was accompanied with two-charge-two-proton transference. The electronic transmission coefficient （a） and diffusion coefficient （DR） for OPP were calculated to be 0.8126 and 3.61× 10^-2 cm2/s, respectively. The electrochemical signal was apparently improved by SDS at the disposable electrode and the oxidative peaks current was proportional to the concentration of OPP over the range from 1.0 ×10^-9 to 4.0 × 10^-6 mol/L with the detection limit of 8.7× 10^-10 mol/L. This novel and highly sensitive method can be successfully applied to detect OPP in the orange rind sample.
基金supported by the National Natural Science Foundation of China (20675071, 20705030 & 20875081)the Natural Science Foundation of Yancheng Institute of Technology (XKY2009009)
文摘A sub-picomole level topotecan hydrochloride determination method was first proposed using sodium dodecyl sulfate (SDS) as a sensitized reagent at a novel disposable electrode (an improved wax-impregnated graphite electrode).The effects of different kinds of surfactants on the electrochemical response to topotecan hydrochloride were examined.The results indicate the electrochemical signal was apparently improved by SDS.At optimal conditions,the oxidative peak current increased linearly with the logarithm of concentrations for topotecan hydrochloride in the ranges of 2.0 × 10-12 to 1.0 × 10-11 mol/L and 8.0 × 10-11 to 8.0 × 10-10 mol/L with a detection limit of 6.4 × 10-13 mol/L.The proposed method could be applied in determining topotecan hydrochloride in urine.
