Determination and Analysis of Trace Elements in Five Kinds of Traditional Chinese Medicine in High Blood Pressure Medicinal Food by ICP-AES

Table 6

Accuracy and recovery of determination method.

Element	RSD (%)	Base value	Quantity added	Quantity found	Recovery (%)
As	0.41	4.45	5.00	9.12	93.40
Ca	3.75	1140.00	1100.00	2255.00	101.36
Cd	Not detected	Not detected	10.00	9.40	94.00
Co	4.35	6.15	6.00	11.96	96.83
Cr	1.16	3.70	4.00	7.50	95.00
Cu	1.21	8.05	10.00	17.96	99.10
Fe	2.49	54.40	50.00	103.30	97.80
K	1.46	7975.00	8000.00	15989.00	100.18
Mg	2.53	783.00	800.00	1567.00	98.00
Mn	0.006	7.90	8.00	15.20	91.25
Na	0.96	426.55	400.00	836.87	102.08
Ni	4.82	5.10	5.00	9.87	95.40
Pb	1.09	7.95	8.00	15.63	96.00
Se	4.07	8.85	10.00	18.26	94.10
Zn	3.95	19.20	20.00	40.06	104.30