Detection and measurement of heavy metals

Details Detection and measurement of heavy metals Detection and measurement of heavy metals

1993-08-11

1995-02-21

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204412, 204434, G01N 2726

Patent

active

053912705

ABSTRACT:
Disclosed herein is an improved method for measuring the presence and amount of a variety of metals contained in a sample. In the first step, all of the various forms of each metal are converted to a soluble metallic complex which is capable of being electrochemically reduced. Voltammetry is then used to determine the stripping current or charge characteristic of each metallic complex. Finally, the concentration of each metal can be calculated by insertion of the stripping current or charge value into an equation which correlates peak current or charge values with metal concentration.
The metals which can be detected and quantified by using this method are gold, silver, bismuth, cadmium, thallium, and mercury.

REFERENCES:
patent: 3329599 (1967-07-01), Brewer
patent: 4090926 (1978-05-01), Matson
patent: 4146436 (1979-03-01), Kellermann et al.
Kolthoff et al, Polarography, 2d. rev. ed., (1952), vol. 2, pp. 507-510.

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