期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Determination of trace amounts of morphine in human plasma by anodic adsorptive stripping differential pulse voltammetry 被引量:3
1
作者 Ali Niazi Ateesa Yazdanipour 《Chinese Chemical Letters》 SCIE CAS CSCD 2008年第4期465-468,共4页
New adsorptive anodic differential pulse stripping voltammetry method for the direct determination of morphine at trace levels in human plasma of addicts is proposed.The procedure involves an adsorptive accumulation o... New adsorptive anodic differential pulse stripping voltammetry method for the direct determination of morphine at trace levels in human plasma of addicts is proposed.The procedure involves an adsorptive accumulation of morphine on a HMDE,followed by oxidation of adsorbed morphine by voltammetry scan using differential pulse modulation.The optimum conditions for the analysis of morphine are pH 10.5,Eacc of -100 mV(vs.Ag/AgCl),and tacc of 120 s.The peak current is proportional to the concentration of morphine,and a Linear calibration graph is obtained at 0.01-3.10μg mL^-1.A relative standard deviation of 1.06%(n=5)was obtained,and the limit of detection was 3 ng mL^-1.The capabiLity of the method for the analysis of real samples was evaluated by the determination of morphine in spiked human plasma and addicts human plasma with satisfactory results. 展开更多
关键词 MORPHINE Adsorptive differential pulse voltammetry Human plasma
下载PDF
Gas-sensor property of single-molecule device:F_2 adsorbing effect
2
作者 李宗良 毕俊杰 +5 位作者 刘然 衣晓华 傅焕俨 孙峰 魏明志 王传奎 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第9期536-541,共6页
The single thiolated arylethynylene molecule with 9,10-dihydroanthracene core(denoted as TADHA) possesses pronounced negative differential conductance(NDC) behavior at lower bias regime. The adsorption effects of ... The single thiolated arylethynylene molecule with 9,10-dihydroanthracene core(denoted as TADHA) possesses pronounced negative differential conductance(NDC) behavior at lower bias regime. The adsorption effects of F2 molecule on the current and NDC behavior of TADHA molecular junctions are studied by applying non-equilibrium Green's formalism combined with density functional theory. The numerical results show that the F2 molecule adsorbed on the benzene ring of TADHA molecule near the electrode can dramatically suppresses the current of TADHA molecular junction. When the F2 molecule adsorbed on the conjugated segment of 9,10-dihydroanthracene core of TADHA molecule, an obviously asymmetric effect on the current curves induces the molecular system showing apparent rectifier behavior. However, the current especially the NDC behavior have been significantly enlarged when F2 addition reacted with triple bond of TADHA molecule. 展开更多
关键词 molecular device negative differential conductance(NDC) F2 adsorption gas-sensor effect
下载PDF
Study on the determination of trace rhenium(Ⅶ)by the adsorption differential pulse polarography
3
作者 Rolf Neeb 《Acta Chimica Sinica English Edition》 SCIE CAS CSCD 1989年第5期412-421,共1页
The determination of trace rhenium(Ⅶ)by differential pulse polarography in the system of H_2SO_4-(NH_2OH)_2·H_2SO_4-TeO_4^(2-) is markedly improved by the addition of Nitron,which is adsorbed on the surface of m... The determination of trace rhenium(Ⅶ)by differential pulse polarography in the system of H_2SO_4-(NH_2OH)_2·H_2SO_4-TeO_4^(2-) is markedly improved by the addition of Nitron,which is adsorbed on the surface of mercury electrode.The limit of detection is down to 2×10^(-10) M.The adsorptive peak potential is -0.80V(vs.SCE).In the ranges of 5×10^(-10)-10^(-8),1×10^(-8)-10^(-7) and 1× 10^(-7)-10^(-6)M,there are good linear relationships between the peak current increment and the concentration,of which the relative standard deviations are 9.5,6.6,1.8% respectively with the correlation coefficients of linear regression of 0.995—0.999.The results relating to this polarographic wave show that it is an adsorption-catalytic wave.The mechanism of the electrode reaction is dis- cussed. 展开更多
关键词 Study on the determination of trace rhenium by the adsorption differential pulse polarography
全文增补中
上一页 1 下一页 到第
使用帮助 返回顶部