The direct method proposed herein was used for the quantification
of cadmium in six vinegar samples purchased in supermarkets
in Salvador City, Brazil. All the results obtained (expressed as 95%
confidence intervals) are shown in Table 5. The cadmium contents
of these six samples varied from 20 to 880 ng L1
.
These six samples were also analysed by acid digestion method,
using a reflux system and then analysed by ET AAS. The results presented
in Table 5 were compared using statistical methods, and it
was concluded that there is no difference between the results