Method for measuring the quantity of lead on the surface of a br

Details Method for measuring the quantity of lead on the surface of a br Method for measuring the quantity of lead on the surface of a br

1995-12-05

1997-03-18

Williams, Hezron E.

Chemistry: analytical and immunological testing

Metal or metal containing

73 5301, C12P 1964

Patent

active

056122241

ABSTRACT:
A process for measuring the quantity of lead on the waterway surface of a brass component, for example a brass plumbing fixture, includes the steps of filling the brass component waterway with an aqueous solution of an acid which removes lead from the surface of the brass component. The acid solution is removed from the waterway after a time period which is sufficient to remove substantially all surface lead from the brass component, but which is insufficient for the acid to remove significant surface zinc and copper to expose surface lead. The quantity of lead per unit surface area of the brass component can then be determined by the use of the volume of the acid solution, the surface area of the brass component and the concentration of lead in the acid solution.

REFERENCES:
patent: 4786604 (1988-11-01), Michael
patent: 4873197 (1989-10-01), Gould
patent: 5019516 (1991-05-01), Wiese
patent: 5278075 (1994-01-01), Stone

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