Determination of heavy metals by thin-layer chromatography-square-wave anodic stripping voltammetry

Journal Article · Tue Dec 15 00:00:00 EST 1992 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00048a015· OSTI ID:7001176

Aldstadt, J H; Dewald, H D ^[1]

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1. Ohio Univ., Athens (United States)

A square-wave anodic stripping voltammetric method is described for low parts per million determination of heavy metals separated by thin-layer chromatography (TLC). Heavy metal samples are separated on carboxymethyl cellulose TLC plates and detected by anodic stripping voltammetry (ASV) using a cellulose dialysis membrane-covered mercury film electrode (CM-MFE) placed directly on the TLC plate surface in a thin film of supporting electrolyte solution. The fast scan rates possible in square-wave voltammetry during the stripping step eliminate the need to deoxygenate the sample. Results are presented for a mixture of Pb(II), Cd(II), Cu(II), and Zn(II). Calibration curves for Pb(II) were linear over the range 10-500 ng, with a relative standard deviation of the peak current over a set of eight separate 100-ng Pb(II) samples of 16%. 25 refs., 7 figs.

• OSTI ID: 7001176
• Journal Information: Analytical Chemistry (Washington); (United States), Vol. 64:24; ISSN 0003-2700
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
CADMIUM
VOLTAMETRY
COPPER
LEAD
ZINC
CALIBRATION
EXPERIMENTAL DATA
QUANTITATIVE CHEMICAL ANALYSIS
THIN-LAYER CHROMATOGRAPHY
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DATA
ELEMENTS
INFORMATION
METALS
NUMERICAL DATA
SEPARATION PROCESSES
TRANSITION ELEMENTS
400105* - Separation Procedures
400102 - Chemical & Spectral Procedures
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