Trace metal and aflatoxin concentrations in some processed cereal and root and tuber flour

Food Safety and Risk

Table 1 Variations in trace metal concentration in mg/Kg dried weight of root and tuber flour

Sample	As	Cu	Fe	Hg	Pb	Zn
Sweet potato flour	<0.01^a	0.69 ± 0.01^a	10.97 ± 0.01^a	<0.01^a	<0.01^a	6.79 ± 0.01^a
Cocoyam flour	<0.01^a	6.63 ± 0.02^b	27.64 ± 0.16^b	<0.01^a	<0.01^a	15.54 ± 0.52^b
Water yam flour	<0.01^a	3.67 ± 0.02^c	15.11 ± 0.06^c	<0.01^a	0.02 ± 0.01^a	9.19 ± 0.04^c

Results are presented as means ± standard deviation. Superscript to figures in the same column implies significant or insignificant differences at p < 0.05 (ANOVA, Duncan test)

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