Method for colorimetric analysis of metals

Details Method for colorimetric analysis of metals Method for colorimetric analysis of metals

1989-06-02

1990-04-24

Lacey, David L.

Chemistry: analytical and immunological testing

Metal or metal containing

Organometallic compound determined

436178, 436 76, G01N 3320

Patent

active

049200577

ABSTRACT:
A portable test kit for colorimetric analysis of trace levels of dithizone-complexing metal cations including lead, is provided. The test kit includes storage tubes each of which contains the reagents and apparatus required for a single test, and has sufficient volumetric capacity to serve as a vessel for the formation and extraction of colored, metal cation-dithizonate complex. Use of the test kit involves a novel and unique sampling technique for capturing a portion of a colored liquid within a container for viewing of the color. Also provided is an improved method for analyzing for trace levels of such metal cations.

REFERENCES:
patent: 3634038 (1972-05-01), Rampy
patent: 3912454 (1975-11-01), Snyder
patent: 3980436 (1976-09-01), Greenfield et al.
patent: 4125376 (1978-11-01), Razulis
patent: 4332769 (1982-06-01), Rampy et al.
patent: 4409182 (1972-02-01), Macklem
patent: 4537747 (1985-08-01), Castaneda
patent: 4770853 (1988-09-01), Bernstein
patent: 4786604 (1988-11-01), Michael
Snyder, Anal. Chem., vol. 19 (9): 684-687, (Sep. 1947).
LaMotte Chemical Products Company, Information for Lead in Water Kit, Including Instruction Manual for the Octet Comparator; plus two photographs of the Lamotte Lead Kit.
Hach Chemical Company, Information for Hach Method of Analyzing for Lead Using Dithizone.

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