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Clinical Chemistry 18: 923-927, 1972;
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Clinical Chemistry, Vol 18, 923-927, Copyright © 1972 by the American Association for Clinical Chemistry

Determination of Copper in Fingernails by Atomic Absorption with the Graphite Furnace

William B. Barnett 1 and Herbert L. Kahn 1

1 Perkin-Elmer Corp., Norwalk, Conn. 06856.

Two atomic absorption techniques, acid digestion followed by conventional flame analysis and direct analysis of solid samples with the graphite furnace, were compared for the determination of copper in fingernails. Nail samples, from 11 persons, containing between 5 and 50 µg/g of copper, were analyzed by both methods. There was good correlation between results of the two. The furnace requires less sample preparation, has good sensitivity, and solid samples may be directly analyzed.


Key Words: toxicology of copper • direct analysis of samples • nonhomogeneity of fingernails • toenails • cystic fibrosis • pediatric samples • aid to diagnosis • normal values • trace-element analysis

Submitted on March 16, 1972
Accepted on June 5, 1972




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Copyright © 1972 by the American Association for Clinical Chemistry.