Marine Environmental Risk Assessment of Sungai Kilim, Langkawi, Malaysia: Heavy Metal Enrichment Factors in Sediments as Assessment Indexes

Table 3

Recovery test results (concentration for Fe is in percentage (%), while other metals are in μg/g dry weight).

Heavy metals	Measured SRM	Certified value	Recovery (%)
Iron, Fe	2.053 ± 0.115%	2.008 ± 0.039%	102.24
Cadmium, Cd	0.127 ± 0.011	0.148 ± 0.007	85.81
Cobalt, Co	4.726 ± 0.028	5.000	94.52
Lead, Pb	9.552 ± 0.473	11.7 ± 1.2	81.67
Zinc, Zn	45.389 ± 0.698	48.9 ± 1.60	92.82