Table 3.

Analytical method parameters.

Metal	ERM certified concentration (mg/kg)	Found concentration (mg/kg)	%RSD	LoQ (mg/kg)	Recovery (%)
Cd	0.336	0.30	0.15	0.002	89.3
Hg	0.071	0.072	0.03	0.02	101
Pb	2.18	1.788	0.09	0.01	82.0

RSD relative standard deviation, LoQ limit of quantification.