Differential pulse anodic stripping voltammetry in a thin-layer electrochemical cell

DeAngelis, Thomas P.; Heineman, William R.

doi:10.1021/ac50008a052

Cited by 27 publications

(14 citation statements)

References 10 publications

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“…The feasibility of combining the low détection limit of differential puise voltammetry (d.p.v.) with the small volume capability of thin-layer electrochemical cells for determining small amounts of métal ions and organic compounds has recently been demonstrated [26,27] The wax-impregnated graphite électrode was made from POCO FXI spectroscopic graphite rods. The électrode was polished as previously described [26].…”

confidence: 99%

Thin-layer differential pulse voltammetric determination of chlorpromazine in biological fluids

Jarbawi

Heineman

Patriache

1981

Analytica Chimica Acta

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The combination of a thinlayer electrochemical cell with differential puise voltam metry can be used to détermine chlorpromazine in plasma and urine. The thinlayer cell (23 AJI capacity) has a waximpregnated graphite électrode. Direct détermination of chlor promazine in urine gave a linear calibration curve for the range 4.8 X 10"'-2.4 X lO"* M with 97% recovery. No interférence from glutethimide, dextropropoxyphene, meprobam ate, diazepam, and methaqualoneHCl was detected. Direct measurement of chlorproma zine in plasma gave a linear calibration curve for the range 2.4 X 10"'-4.8 X 10"* M with 89% recovery. The procédure for plasma and urine requires only 2 min per détermination. Détection levels are below that required for monitoring therapeutic levels of chlorproma zine in urine.

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confidence: 99%

Thin-layer differential pulse voltammetric determination of chlorpromazine in biological fluids

Jarbawi

Heineman

Patriache

1981

Analytica Chimica Acta

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“…Part of the error will mix into the FA scheme. We can express this fact by writing eik = efk + efk (18) where Xf = (rf + cf)2 for; = 1.....n (26) and ?= (<$)2 for; = +1,... ,c…”

Section: [Z] = [D]t[d]mentioning

confidence: 99%

Theory of error in factor analysis

Malinowski¹

1977

Anal. Chem.

260

115

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Hg-Ni OTTLE at this pH, showing that the glyoxylic acid wave is obscured by hydrogen evolution at this electrode. As a result of the extended negative range, glyoxylic acid could be analyzed by thin-layer coulometry and by thin-layer differential pulse voltammetry in the Hg-Au OTTLE (26, 27).Reduction of Metals. The utility of the Hg-Au minigrid for the reduction of metal ions to the elemental form is limited by the tendency of the gold which is dissolved in the mercury film to form intermetallic compounds with other metals (Cd, Mn, Sn, Zn) deposited in the mercury (28). For example, lead, which does not form an intermetallic compound with gold, gave a well-behaved, reversible cyclic voltammogram at the Hg-Au minigrid. By contrast, cadmium gave a good reduction wave, but the oxidation wave for Cd°was absent due to the formation of a Cd-Au intermetallic compound.

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“…If the common deoxygenation procedure of bubbling an inert gas such as nitrogen or argon from portable, hand-held containers poses a problem, more POC-friendly means of deoxygenation would need to be explored. One approach would be to remove oxygen by electrochemical reduction to water at a negative potential, as is sometimes done in thin-layer electrochemistry , which might require a change in procedure (such as a smaller sample size) or cell design that would enable exhaustive electrolysis of the dissolved oxygen. Another approach would be to prepare deoxygenated acetate buffer aliquots in vacuum-sealed containers for use in the field.…”

Section: Discussionmentioning

confidence: 99%

Determination of Lead with a Copper-Based Electrochemical Sensor

Kang¹,

Pei²,

Rusinek³

et al. 2017

Anal. Chem.

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124

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This work demonstrates determination of lead (Pb) in surface water samples using a low-cost copper (Cu)-based electrochemical sensor. Heavy metals require careful monitoring due to their toxicity, yet current methods are too complex or bulky for point-of-care (POC) use. Electrochemistry offers a convenient alternative for metal determination, but the traditional electrodes, such as carbon or gold/platinum, are costly and difficult to microfabricate. Our Cu-based sensor features a low-cost electrode material – copper – that offers simple fabrication and competitive performance in electrochemical detection. For anodic stripping voltammetry (ASV) of Pb, our sensor shows 21 nM (4.4 ppb) limit of detection, resistance to interfering metals such as cadmium (Cd) and zinc (Zn), and stable response in natural water samples with minimum sample pretreatment. These results suggest this electrochemical sensor is suitable for environmental and potentially biological applications, where accurate and rapid, yet inexpensive on-site monitoring is necessary.

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Differential pulse anodic stripping voltammetry in a thin-layer electrochemical cell

Cited by 27 publications

References 10 publications

Thin-layer differential pulse voltammetric determination of chlorpromazine in biological fluids

Thin-layer differential pulse voltammetric determination of chlorpromazine in biological fluids

Theory of error in factor analysis

Determination of Lead with a Copper-Based Electrochemical Sensor

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