In order to validate the developed method, the method was
applied for determination of copper in the SRM 1568A Rice Flour,
8433 Corn Bran and TMDA-64.2 water–trace elements certified
reference materials. Comparison of the copper concentration
found with the certified value show good accuracy of the method
(Table 2). Furthermore, the accuracy of the developed method was
evaluated by applying the addition and recovery experiments for
water and food samples.There covery results given in Table 3
show that a good agreement was obtained between the added and
recovered copper contents.The proposed procedure was reliable
and independence from matrix effects for determination of wide
range of samples.