Table 2D.

Comparison of the heavy metal (Cd, Cr, As, and Pb) contents in commercial yam powder products to standard level in drinking water

Yam powder products1)	Cd2)		Cr		As		Pb
	Yam (mg/kg)	Drinking water3) (mg/L)	Yam (mg/kg)	Drinking water (mg/L)	Yam (mg/kg)	Drinking water (mg/L)	Yam (mg/kg)	Drinking water (mg/L)
A	0.043±0.004	<0.005	0.695±0.247	<0.05	0.174±0.158	<0.01	0.740±0.268	<0.01
B	0.045±0.006	<0.005	4.610±0.354	<0.05	0.109±0.098	<0.01	0.687±0.343	<0.01
C	0.039±0.013	<0.005	0.615±0.375	<0.05	0.045±0.012	<0.01	0.446±0.044	<0.01
D	0.047±0.004	<0.005	0.318±0.110	<0.05	0.190±0.216	<0.01	0.615±0.096	<0.01
E	0.031±0.002	<0.005	0.758±0.088	<0.05	0.060±0.018	<0.01	0.077±0.062	<0.01
F	0.042±0.018	<0.005	0.618±0.060	<0.05	0.023±0.017	<0.01	0.198±0.046	<0.01
Mean±SD	0.041±0.001	<0.005	1.269±0.206	<0.05	0.100±0.087	<0.01	0.460±0.143	<0.01

¹⁾The same yam powder products as in Table 1.

²⁾Cd, cadmium; Cr, chromium; As, arsenic; Pb, lead.

³⁾The source for the values of heavy metal contents in drinking water are from the sewerage division in water supply and sewerage policy office of Korea ministry of environment, Article 2 (1) (23).

Values are from two separate experiments performed in duplicates (mean±SD).