The Hazard Content of Cadmium, Lead, and Other Trace Elements in Some Medicinal Herbs and Their Water Infusions

Table 2

Concentrations of selected elements in the NIST1570a certified reference material.

Metal	Certified value; mg/kg	Measured value; mg/kg	Recovery %
Mn	75.9	72	94.9
Zn	82	84	102.4
Ni	2.14	2.0	93.5
Co	0.39	0.36	92.3
Cu	12.2	11.3	92.6
Cd	2.89	2.59	89.6