For direct determination of mercury in nut samples, a small
amount of tree nut was weighed inside a nickel boat and introduced
automatically into the direct mercury analyser (DMA-80). The
measurements were performed with different weights (50, 100 and
150 mg) and three replicates were carried out for each sample. The
analysis was also performed after the consecutive injection of the
same sample in the boat and Hg pre-concentration on the gold trap
before its determination. Thus, 2 and 3 pre-concentrations with
50 mg of the sample were carried out.