Discrete Complexed Ligand and Catalytic Nickel Peaks in the Differential Pulse Polarography and Cathodic Stripping Voltammetry of Mordant Red 74

Abstract Arsenic and selenium are determined in foods by differential pulse polarography and cathodic stripping voltammetry. The sample is digested with nitric acid and magnesium nitrate and then dissolved in dilute hydrochloric acid. An aliquot is removed, the arsenic is chemically reduced to the trivalent state, and interferences are removed by ion exchange before polarography. Selenium is determined in a second aliquot by cathodic stripping voltammetry. Recoveries for both elements in several foods were from 90 to 110%. The relative standard deviations for arsenic at 5 ppm and selenium at 0.48 ppm were 5.8 and 7.3%, respectively.

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Electrochemical determination of muscle relaxant drug tetrazepam in bulk form, pharmaceutical formulation, and human serum

Chemical Papers ◽

10.2478/s11696-008-0001-7 ◽

2008 ◽

Vol 62 (2) ◽

Cited By ~ 6

Author(s):

Mohammed Ghoneim ◽

Hanaa El-Desoky ◽

Mohammed El-Ries ◽

Ashraf Abd-Elaziz

Keyword(s):

Human Serum ◽

Mercury Electrode ◽

Stripping Voltammetry ◽

Differential Pulse ◽

Electrochemical Determination ◽

Differential Pulse Polarography ◽

Linear Sweep ◽

Square Wave ◽

Cathodic Stripping Voltammetry ◽

Cathodic Stripping

AbstractTetrazepam dissolved in the Britton-Robinson universal buffer of various pH values (2.5–11.5) containing 10 vol. % of ethanol was reduced at the mercury electrode in a single 2-electron irreversible step due to reduction of the 4,5 C=N double bond of the seven-membered ring. Differential pulse polarography (DPP) and adsorptive cathodic stripping voltammetry (AdCSV) techniques (Linear sweep LS, differential pulse DP and square-wave SW modes) for quantification of tetrazepam in bulk form and in myolastan tablets are presented. Moreover, the described linear sweep, differential pulse, and square-wave adsorptive cathodic stripping voltammetry was successfully applied in quantification of tetrazepam in spiked human serum without any prior extraction of the drug. The obtained results showed an increased sensitivity of the described electro-analytical procedures for the quantification of tetrazepam in the following order DPP, DP-AdCSV, LS-AdCSV, and SW-AdCSV, since the observed limits of tetrazepam quantitation by these electroanalytical techniques were 5 × 10−6 mol L−1, 3 × 10−7 mol L−1, 1 × 10−8 mol L−1, and 3 × 10−9 mol L−1, respectively.

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Possibility of determination of some derivatives of pterin important in the diagnostics of malignant tumours by using differential pulse polarography

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19860034 ◽

1986 ◽

Vol 51 (1) ◽

pp. 34-44

Author(s):

Václav Kočmíd ◽

Miroslav Podolák ◽

Jiří Čoupek ◽

Oskar Andrýsek

Keyword(s):

Stripping Voltammetry ◽

Differential Pulse ◽

Differential Pulse Polarography ◽

Polarographic Reduction ◽

Malignant Tumours ◽

Cathodic Stripping Voltammetry ◽

Polarographic Behaviour ◽

Pulse Polarography ◽

Derivatives Of

The polarographic behaviour of 6,7-dimethylpterin, xanthopterin, 6-pterinaldehyde, neopterin and 6-hydroxymethylpterin was investigated. These compounds are suitably determined by employing differential pulse polarography; some results suggest the possibility of their determination by cathodic stripping voltammetry with adsorptive accumulation. For all compounds, the effect of pH on polarographic reduction was examined. Under optimal conditions, the calibration curve of all compounds under investigation was linear in the range 2 . 10-6 - 1 . 10-7 mol/l and the detection limit was below 1 . 10-7 mol/l.

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Polarographic and Voltammetric Determination of Trace Amounts of 3-Nitrofluoranthene

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20061571 ◽

2006 ◽

Vol 71 (11-12) ◽

pp. 1571-1587 ◽

Cited By ~ 6

Author(s):

Karel Čížek ◽

Jiří Barek ◽

Jiří Zima

Keyword(s):

River Water ◽

Solid Phase ◽

Mercury Electrode ◽

Stripping Voltammetry ◽

Differential Pulse ◽

Differential Pulse Polarography ◽

Pulse Polarography ◽

Dropping Mercury Electrode ◽

Separation And Preconcentration

The polarographic behavior of 3-nitrofluoranthene was investigated by DC tast polarography (DCTP) and differential pulse polarography (DPP), both at a dropping mercury electrode, differential pulse voltammetry (DPV) and adsorptive stripping voltammetry (AdSV), both at a hanging mercury drop electrode. Optimum conditions have been found for its determination by the given methods in the concentration ranges of 1 × 10-6-1 × 10-4 mol l-1 (DCTP), 1 × 10-7-1 × 10-4 mol l-1 (DPP), 1 × 10-8-1 × 10-6 mol l-1 (DPV) and 1 × 10-9-1 × 10-7 mol l-1 (AdSV), respectively. Practical applicability of these techniques was demonstrated on the determination of 3-nitrofluoranthene in drinking and river water after its preliminary separation and preconcentration using liquid-liquid and solid phase extraction with the limits of determination 4 × 10-10 mol l-1 (drinking water) and 2 × 10-9 mol l-1 (river water).

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Nylon 6,6 modified screen printed carbon electrodes as electrochemical sensors for rapid chlorothalonil determination in water samples using differential pulse cathodic stripping voltammetry

Journal of Environmental Science and Health Part B ◽

10.1080/03601234.2018.1561057 ◽

2019 ◽

Vol 54 (4) ◽

pp. 294-302 ◽

Cited By ~ 2

Author(s):

Paramalinggam Thanalechumi ◽

Abdull Rahim Mohd Yusoff ◽

Zulkifli Yusop

Keyword(s):

Water Samples ◽

Electrochemical Sensors ◽

Stripping Voltammetry ◽

Differential Pulse ◽

Carbon Electrodes ◽

Cathodic Stripping Voltammetry ◽

Nylon 6,6 ◽

Screen Printed ◽

Cathodic Stripping

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Determination of Copper, Nickel, and Chromium in Foods

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/66.3.620 ◽

1983 ◽

Vol 66 (3) ◽

pp. 620-624

Author(s):

Walter Holak

Keyword(s):

Anodic Stripping Voltammetry ◽

Stripping Voltammetry ◽

Differential Pulse ◽

Atomic Absorption Spectrophotometry ◽

Differential Pulse Polarography ◽

National Bureau ◽

Pulse Polarography ◽

Digestion Technique ◽

Determination Of Copper

Abstract A collaboratively studied method for Pb, Cd, As, Se, and Zn that uses a closed system digestion technique has now been extended to include 3 additional elements, Cu, Ni, and Cr. Cu is determined by either atomic absorption spectrophotometry or anodic stripping voltammetry, depending on the concentration. Ni and Cr are determined by differential pulse polarography. Analysis of National Bureau of Standards reference materials by this procedure gives values in close agreement with the accepted values. Recoveries from applesauce and chicken spiked at 0.6-4 μg/g are in the 92-101% range. The sensitivity of the multielement procedure is 0.34,0.14, and 0.24 μg/g for Cu, Ni, Cr, respectively, at the 90% confidence level.

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