Results 201 to 210 of about 560 (248)
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Determination of Cobalt in Seawater by Catalytic Adsorptive Cathodic Stripping Voltammetry
Analytical Chemistry, 1997A new procedure for the direct determination of picomolar levels of cobalt in seawater is presented. Cathodic stripping voltammetry is preceded by adsorptive accumulation of the cobalt-nioxime (cyclohexane-1,2-dione dioxime) complex from seawater containing 6 μM nioxime and 80 mM ammonia at pH 9.1, onto a hanging mercury drop electrode, followed by ...
M, Vega, C M, van den Berg
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Determination of the pesticide Chlorpyrifos by cathodic adsorptive stripping voltammetry
Fresenius' Journal of Analytical Chemistry, 1998The adsorption behavior and differential pulse cathodic adsorptive stripping voltammetry of the pesticide Chlorpyrifos (CP) were investigated at the hanging mercury drop electrode (HMDE). The pesticide was accumulated at the HMDE and a well-defined stripping peak was obtained at –1.2 V vs Ag/AgCl electrode at pH 7.50.
M. S. El-Shahawi, M. M. Kamal
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On-line determination of chromium by adsorptive cathodic stripping voltammetry
The Analyst, 1994To date, the application of adsorptive cathodic stripping voltammetry (ACSV) to chromium determination has commonly involved static systems in a batch approach. The use of ACSV in a dynamic system is reported here. The on-line system is described and optimization of the experimental parameters discussed.
Andrew M. Dobney, Gillian M. Greenway
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Trace determination of molybdenum by adsorptive cathodic stripping voltammetry
Journal of the Iranian Chemical Society, 2006Molybdenum is determined by adsorptive cathodic stripping voltammetry in 0.15 M nitric acid solution containing 15 μM 2′,3,4′,5,7-pentahydroxyflavone (morin) as a ligand. In this medium, molybdenum is preconcentrated on a hanging mercury drop electrode and stripped cathodically in square-wave voltammetry mode, with a peak potential of -350 mV vs.
R. Hajian, E. Shams
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Determination of trace amounts of estriol and estradiol by adsorptive cathodic stripping voltammetry
The Analyst, 1992Estriol and estradiol are electroinactive in the potential range from -200 to -1000 mV versus a silver-silver chloride electrode at a mercury electrode. The conversion of these estrogens into electroactive nitro derivatives of estrogens, which are used for voltammetric determination, was studied.
S, Hu, Q, He, Z, Zhao
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Analytica Chimica Acta, 2005
This paper describes a stripping voltammetric method for the determination of aluminum as contaminant in dialysis concentrates. It is based on the adsorptive deposition of the complex Al-1,2-dihydroxyanthraquinone-3-sulfonic acid (DASA) at the hanging mercury drop electrode (HMDE) at -0.9V (versus Ag/AgCl) and its cathodic stripping during the ...
Leandro M, de Carvalho +4 more
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This paper describes a stripping voltammetric method for the determination of aluminum as contaminant in dialysis concentrates. It is based on the adsorptive deposition of the complex Al-1,2-dihydroxyanthraquinone-3-sulfonic acid (DASA) at the hanging mercury drop electrode (HMDE) at -0.9V (versus Ag/AgCl) and its cathodic stripping during the ...
Leandro M, de Carvalho +4 more
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Analytical Proceedings including Analytical Communications, 1994
Stripping voltammetric methods involve both accumulation and determination steps, and sometimes intermediate steps. Ideally it would be helpful if nomenclature could be found which gave information on the nature of all of the steps involved. Possible combinations of accumulation and determination methods in stripping voltammetry are considered here.
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Stripping voltammetric methods involve both accumulation and determination steps, and sometimes intermediate steps. Ideally it would be helpful if nomenclature could be found which gave information on the nature of all of the steps involved. Possible combinations of accumulation and determination methods in stripping voltammetry are considered here.
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Square-wave adsorptive cathodic stripping voltammetry of pantoprazole
Journal of Pharmaceutical and Biomedical Analysis, 2003Adsorption and reduction of pantoprazole were investigated by cyclic and square-wave voltammetry on a hanging mercury drop electrode in Britton-Robinson buffers at pH 2.0-11.0. The reduction process gave rise to a single peak within the entire pH range.
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Determination of trace tin by catalytic adsorptive cathodic stripping voltammetry
Analytica Chimica Acta, 2005Abstract A highly sensitive and selective catalytic adsorptive cathodic striping procedure for the determination of trace tin is presented. The method is based on adsorptive accumulation of the Sn(IV)–3,4-dihydroxybenzoic acid (DHBA) complex onto a hanging mercury drop electrode, followed by reduction of the adsorbed species. The reduction current is
Yi-Heng Li, Hui Long, Fang-Qin Zhou
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The determination of platinum in sea water by adsorptive cathodic stripping voltammetry
Analytica Chimica Acta, 1988Abstract The catalytic effect of the formazone complex with platinum on the development of hydrogen at a mercury electrode is used to provide a very sensitive method of determining dissolved platinum in fresh and sea water by adsorptive cathodic stripping voltammetry. The optimal analytical conditions include the addition of 0.012% (w/v) formaldehyde,
Constant M.G. van den Berg +1 more
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