presents recoveries of spiked samples, repeatabilities,
linear calibration ranges and detection limits for ICP-OES and
F-AAS. The recoveries ranging from 94% to 97% for ICP-OES andfrom 94% to 99% for F-AAS, are satisfactory and confirm the accuracy
of the proposed procedure. The relative standard deviation
(RSD) usually does not exceed 3% what indicates that Cd, Cu, Ni,
Pb, and Zn can be determined in solution samples with high
precision.