Determination of Heavy Metals in Alpinia oxyphylla Miq. Collected from Different Cultivation Regions

Table 5

The results of recovery tests .

Element	Content of sample (μg.)	Mass of added certified element (μg·)	Content by analyzed (μg·)	Recoveries (%)	Average recoveries (%)	RSD (%)
As	0.3754	0.4500	0.7824	90.5	93.4	2.6
		0.5500	0.9265	108.8
		0.6600	1.0134	92.9
Hg	0.0409	0.0180	0.0626	94.4	102.8	1.8
		0.0230	0.0677	101.3
		0.0270	0.0718	112.8
Pb	0.3791	0.3000	0.7086	109.8	101.9	1.3
		0.3800	0.7643	101.4
		0.4600	0.8132	94.4
Cd	0.0379	0.0120	0.0514	112.8	104.2	2.2
		0.0150	0.0519	93.5
		0.0190	0.0582	106.3
Cu	21.50	3.000	24.75	108.3	101.6	2.1
		4.000	24.13	93.8
		5.000	26.63	102.5