Table 2. Toxic and essential elements level in tea infusion samples (mean + standard deviation).

Sample	Toxic elements level				Essential elements level
	As (µg/g)	Al (mg/g)	Cd (µg/g)	Pb (µg/g)	Zn (µg/g)	Fe (µg/g)	Cu (µg/g)	Mg (µg/g)
Brand A	0.3 ± 0.01	0.9 ± 0.04	<LOD	0.1 ± 0.01	9.4 ± 0.35	39.4 ± 2.20	17.2 ± 0.49	209.8 ± 13.61
Brand B	0.3 ± 0.03	0.7 ± 0.04	<LOD	0.3±0.02	11.4 ± 0.14	52.3 ± 0.13	17.7 ± 0.50	292.0 ± 19.26
Brand C	0.2 ± 0.01	0.8 ± 0.04	<LOD	0.1±0.01	12.8 ± 0.71	55.8 ± 1.17	16.5 ± 0.49	124.0 ± 15.76
Brand D	0.2 ± 0.01	0.8 ± 0.04	<LOD	0.2±0.01	14.2 ± 1.06	65.4 ± 0.10	17.5 ± 0.45	88.5 ± 13.78
Brand E	0.2 ± 0.01	0.8 ± 0.04	<LOD	0.4±0.02	13.6 ± 1.32	70.0 ± 1.47	17.8 ± 0.90	136.5 ± 18.02
Brand F	0.1 ± 0.01	0.5 ± 0.03	<LOD	0.5±0.02	14.4 ± 1.12	61.3 ± 0.49	15.0 ± 0.69	280.4 ± 11.89
Brand G	0.1 ± 0.01	0.7 ± 0.04	<LOD	0.5 ± 0.02	16.9 ± 1.02	67.2 ± 1.79	13.5 ± 0.46	413.4 ± 7.86
Brand H	0.1 ± 0.01	1.0 ± 0.05	<LOD	0.2 ± 0.01	13.1 ± 1.06	67.7 ± 5.09	13.7 ± 0.32	92.1 ± 7.10

Al, aluminium; As, arsenic; Cd, cadmium; Cu, copper; Fe, iron; LOD, limit of detection; Mg, magnesium; Pb, lead; Zn, zinc.