Determination of Trace Vanadium(V) Using Polarographic Adsorptive Catalytic Wave of Vanadium–Morin–Bromate System

2016 ◽  
Vol 45 (12) ◽  
pp. 1412-1414
Author(s):  
Hong Lin ◽  
Ming Li ◽  
Jianxin Xie ◽  
Xianxue Wu
Keyword(s):  
Catalytic Wave

Polarographic determination of micro-amounts of uranium(VI) from the catalytic wave of iodate

The Analyst ◽  
1984 ◽  
Vol 109 (8) ◽  
pp. 1111 ◽  
Author(s):  
R. Ramachandra Murthy ◽  
V. Suryanarayana Rao
Keyword(s):  
Polarographic Determination ◽  
Catalytic Wave

scholarly journals Polarographic determination of chlorate ion by catalytic wave of titanium (IV)

1970 ◽  
Vol 19 (12) ◽  
pp. 1680-1682 ◽  
Author(s):  
Kunio NAKANO ◽  
Kazuyoshi TANAKA ◽  
Hitoshi MUROI
Keyword(s):  
Polarographic Determination ◽  
Catalytic Wave

Simultaneous determination of hemoglobin and cysteine based on Brdička catalytic currents

1991 ◽  
Vol 56 (1) ◽  
pp. 157-166 ◽  
Author(s):  
Marian Kuik ◽  
Kazimierz Krassowski
Keyword(s):  
Surface Layer ◽  
Simultaneous Determination ◽  
Statistical Evaluation ◽  
Human Hemoglobin ◽  
Constant Concentration ◽  
Catalytic Current ◽  
Catalytic Wave

The effect of the concentration of ammonia on the catalytic currents of bovine and human hemoglobin, cysteine, cystine and glutathione was studied, and the concentration of 3.5 mol l-1 was found optimal for analytical purposes. Mixtures of hemoglobin and cysteine exhibited catalytic wave positions suitable for their simultaneous quantitation. In a buffer containing 3.5 M ammonia, the catalytic current of hemoglobin is virtually independent of the concentration of cysteine, and at a constant concentration of hemoglobin, the catalytic current of cysteine increases linearly with its concentration over the range studied. Statistical evaluation gave evidence that hemoglobin and cysteine can be determined simultaneously in the above buffer. When accounting for some interfering effects with respect to the catalytic currents of glutathione and cysteine, complexation phenomena and properties of the hemoglobin surface layer must be taken into consideration.

A New Polarographic Adsorptive Catalytic Wave for the Determination of Trace Tellurium in Smog Dust and Wheat Flour

1997 ◽  
Vol 57 (3) ◽  
pp. 274-282 ◽  
Author(s):  
Zhou Xiangchun ◽  
Lu Guanghan ◽  
Wang Fang ◽  
Lan Yanhua
Keyword(s):  
Wheat Flour ◽  
Catalytic Wave

Catalytic Voltammetric Determination of Vanadium in Crude Oil at Carbon Nanotube Paste Electrode

2013 ◽  
Vol 634-638 ◽  
pp. 64-67 ◽  
Author(s):  
Li Zheng ◽  
Ying Zhang
Keyword(s):  
Carbon Nanotube ◽  
Crude Oil ◽  
Absorption Spectrometry ◽  
Chemical Oxidation ◽  
Vanadium Concentration ◽  
Catalytic Wave ◽  
Carbon Nanotube Paste Electrode ◽  
Paste Electrode ◽  
Voltammetric Peak

A catalytic voltammetric method for the determination of vanadium(V) at a multi-wall carbon nanotube paste electrode (MWCNT-PE) in a 4-(2-pyridylazo)-resorcinol(PAR)-bromate system is proposed. The voltammetric response of V(V)-PAR complex at MWCNT-PE was significantly enhanced because of a catalytic cycle consisting of electrochemical reduction of V(V) ion in the complex and subsequent chemical oxidation of the reduction product of V(V) by bromate. In pH 2.70 H2SO4 solution containing 5.0×10-6 mol•L-1 PAR and 3.0×10-2 mol•L-1 KBrO3 without any preconcentration, the linear sweep voltammetric peak current of the catalytic wave was proportional to the vanadium concentration in the range of 8.0×10-9 to 3.0×10-6 mol•L-1. The detection limit was 2.5×10-9 mol•L-1. Using the proposed method, the vanadium concentration in crude oil was evaluated and the results were compared with those of atomic absorption spectrometry.

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