Quick color test to detect lead release from glaze and enamel co

Details Quick color test to detect lead release from glaze and enamel co Quick color test to detect lead release from glaze and enamel co

1989-10-06

1991-04-23

Warden, Robert J.

Chemistry: analytical and immunological testing

Metal or metal containing

Organometallic compound determined

422 56, 422 61, 436 74, 436169, 436177, 436178, G01N 3122

Patent

active

050100203

ABSTRACT:
A color test is presented for the purpose of quickly identifying glaze or enamel coatings which releases excessive Pb. Citric acid solution on filter paper is used to extract Pb from the coatings and a Pb sensitive chromogen indicates the presence of Pb on the paper. The quick color test takes approximately 30 minutes to complete. The kits are also provided for determining whether excessive Pb is present in a glaze or enamel coating.

REFERENCES:
patent: 3397964 (1965-01-01), Zall
patent: 3809537 (1974-05-01), Horine
patent: 3893808 (1975-08-01), Campbell
patent: 3934976 (1976-01-01), Zelaskowski
patent: 3955927 (1976-05-01), Zelaskowski et al.
patent: 4244693 (1981-01-01), Guon
patent: 4873197 (1989-10-01), Gould
Gould, J. H. and Capar, S. G., "A Quick Color Test to Detect Lead Release From Glazed Ceramic and Enameled Metalware," Analytical Letters 21(11) 2145-2154 (1988).
"Spot Tests in Inorganic Analysis" by Fritz Feigl et al, sixth English edition, translated by Ralph E. Oesper, pp. 282-287; (1982).
Feigl, Laboratory Manual of Spot Tests, Academic Press, NY 1948, p. 217.
Feigl et al, "Spot Tests in Inorganic Analysis": Elsevier Publishing Co. NY (1972) p. 569.

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