3.3. Application – determination of cadmium in vinegar
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