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

Journal Article · Mon Dec 14 23:00:00 EST 1992 · Analytical Chemistry (Washington); (United States)

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

Aldstadt, J H; Dewald, H D ^[1]

---

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

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105* -- Separation Procedures
54 ENVIRONMENTAL SCIENCES
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
CADMIUM
CALIBRATION
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COPPER
DATA
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
LEAD
METALS
NUMERICAL DATA
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
THIN-LAYER CHROMATOGRAPHY
TRANSITION ELEMENTS
VOLTAMETRY
ZINC