were 0.17 lg/L, 0.49 lg/L and
0.95 lg/L for liquid samples and 6.0 ng/g, 19.6 ng/g and 38.0 ng/g
for solid samples, respectively. The enrichment factor (EF) was
100. The resultant repeatability, expressed as the relative standard
deviations (RSDs) for a minimum of 6 replicates containing 100
lg/L of each analytes, were calculated as 3.0%, 2.3% and 2.6% for
Cu, Ni and Pb, respectively.