Development of an Ozone-Assisted Sample Preparation Method for the Determination of Cu and Zn in Rice Samples

Table 2

Cu and Zn levels in commercial rice samples.

	Cu (mg kg^−1)		Zn (mg kg^−1)
Samples	OAE	MAE	OAE	MAE
Brand A	3.36 ± 0.05	3.27 ± 0.04	20.9 ± 0.9	19.6 ± 0.7
Brand B (brown)	2.82 ± 0.03	2.77 ± 0.02	29.5 ± 0.9	30.8 ± 0.3
Brand C (parboiled)	2.63 ± 0.08	2.52 ± 0.08	7.62 ± 0.91	9.10 ± 0.85
Brand D	2.46 ± 0.04	2.42 ± 0.03	17.4 ± 0.8	16.8 ± 0.3
Brand E	2.38 ± 0.07	2.31 ± 0.08	15.4 ± 0.5	14.9 ± 0.4
Brand F	3.03 ± 0.08	2.97 ± 0.07	21.1 ± 0.7	21.7 ± 0.4
Brand G	3.13 ± 0.06	3.07 ± 0.05	16.2 ± 0.5	16.3 ± 0.3

Results are expressed as mean ± standard deviation (n = 3), dry basis.