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Clinical Chemistry 19: 322-325, 1973;
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Clinical Chemistry, Vol 19, 322-325, Copyright © 1973 by the American Association for Clinical Chemistry

Evaluation of the Delves Micro System for Blood Lead Analysis

Jocelyn M. Hicks 1, Aida N. Gutierrez 1, and Brenda E. Worthy 1

1 Department of Laboratories, Children's Hospital of the District of Columbia, 2125 13th St., N. W., Washington, D. C. 20009.

Correlation between results of a conventional macroscale (5 ml of blood) atomic absorption procedure for lead determination and results of the Delves micro-scale (10 µl blood) atomic absorption method was high (0.96). Analyses of lead in capillary and intravenous blood samples also correlated well (0.93). The coefficient of variation of the Delves micro-scale method was 8% for a concentration of 46 µg of lead per milliliter. We conclude that the Delves microscale method—which is simpler, requires smaller samples than previous methods, and can be readily applied to capillary. ("finger-stick") blood—is very suitable for a pediatric practice and for the screening of large numbers of patients.


Key Words: conventional atomic absorption technique compared • results for capillary and intravenous blood lead compared • mass-screening procedure • lead poisoning • environmental hazards

Submitted on October 25, 1972
Accepted on December 21, 1972




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Copyright © 1973 by the American Association for Clinical Chemistry.