Migration of Toxic Metals from Ceramic Food Packaging Materials into Acid Food Simulants

Table 1

Lead : cobalt : nickel : zinc mass ratios in leachate and in glaze.

Food simulants	Temperature	Pb : Co : Ni : Zn	Pb : Co : Ni : Zn
		Leachate	Glaze
4% acetic acid	20	1 : 6.24 : 5.72 : 6.74	1 : 0.097 : 0.097 : 0.146
	40	1 : 13.75 : 17.81 : 17.15
	60	1 : 8.76 : 13.73 : 8.63
10% acetic acid	20	1 : 6.09 : 6.82 : 4.97
	40	1 : 15.72 : 17.81 : 17.15
	60	1 : 12.91 : 18.87 : 9.86
1% citric acid	20	1 : 6.11 : 6.40 : 5.04
	40	1 : 13.69 : 14.10 : 12.94
	60	1 : 17.22 : 27.30 : 9.03
1% lactic acid	20	1 : 7.69 : 6.98 : 13.19
	40	1 : 12.71 : 16.88 : 15.23
	60	1 : 14.62 : 23.89 : 9.20