Results (
Thai) 1:
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4. Conclusions
The herein proposed method for determination of copper shows
clear advantages in terms of selectivity and sensitivity with respect to
several reported methods and may be used for quickly determination
of copper in these foods and additives of food without previous separation. The sensitivity with a short accumulation time is better than that
for AAS and ICP–AES for copper determination. The levels of copper in
tea, coffee and mate infusions were compared with values found in similar samples in other parts of the world. The results obtained for copper
concentrations were acceptable to human consumption and low toxic
levels
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