Table 5.

Metals leaching (mg/L) from stainless steel and copper cookware upon boiling with sodium bicarbonate for various time intervals.

Metals	Steel (n = 6 Each)				Copper (n = 5 Each)
	Time (h)				Time (h)
	New			Old	New			Old
	0.5	1	2	1	0.5	1	2	1
Al	0.63 ± 0.08	0.79 ± 0.06	1.08 ± 0.15	2.70 ± 0.06	0.12 ± 0.07	0.20 ± 0.16	0.41 ± 0.05	1.27 ± 0.23
Pb	0.345 ± 0.03	0.52 ± 0.01	0.85 ± 0.02	0.33 ± 0.07	0.07 ± 0.28	0.42 ± 0.22	0.78 ± 0.46	0.30 ± 0.04
Fe	1.787 ± 0.06	3.98 ± 0.02	5.86 ± 0.02	1.88 ± 0.03	0.76 ± 0.06	1.28 ± 0.07	1.62 ± 0.05	1.28 ± 0.04
Cr	0.738 ± 0.08	1.21 ± 0.04	1.76 ± 0.07	0.12 ± 0.00	0.74 ± 0.04	2.65 ± 0.13	3.33 ± 0.23	0.10 ± 0.00
Cd	0.113 ± 0.01	0.14 ± 0.01	0.19 ± 0.01	0.05 ± 0.03	0.19 ± 0.03	0.27 ± 0.01	0.47 ± 0.01	0.02 ± 0.01
Cu	0.284 ± 0.01	0.37 ± 0.01	0.48 ± 0.01	0.26 ± 0.01	0.90 ± 0.01	1.40 ± 0.01	1.90 ± 0.02	1.90 ± 0.02
Ni	0.541 ± 0.05	0.91 ± 0.06	1.34 ± 0.04	0.18 ± 0.05	0.20 ± 0.06	0.63 ± 0.07	0.98 ± 0.05	0.22 ± 0.07