Table 4. Recovery (%) of heavy metals

	Pb	Cd	As	Cr	Cu	Ni	Zn	Ag	Hg
Spiked concentration (mg/kg)	0.308	2.48	7.65	2.50	71.6	1.04	1,424	0.666	0.0371
Measured concentration (mg/kg)	0.265	2.32	7.02	2.37	61.2	0.983	1,403	0.558	0.0379
Recovery (%)	85.9	93.6	91.8	94.9	85.5	94.5	98.5	83.8	102

Pb, lead; Cd, cadmium; As, arsenic; Cr, chromium; Cu, copper; Ni, nickel; Zn, zinc; Ag, silver; Hg, mercury.