Cadmium determination
Acid-digested samples were made up to 10 ml with
water, and cadmium content was determined by atomic
absorption spectrometry (Varian Techtron AA5, Melbourne,
Australia). The atomic vapor was produced by
electrothermal atomization (carbon rod atomizer, CRA
63) for Cd concentrations ranging between 1 and 50/xg
liter 1 and air-acetylene flame for concentrations from
50-500/zg liter 1.