Toxic Metals Enrichment in the Surficial Sediments of a Eutrophic Tropical Estuary (Cochin Backwaters, Southwest Coast of India)

Table 1

Trace metal extracted from the standard reference material BCSS-1.

	Trace metal extracted from the standard reference material BCSS-1 (𝑛=5)
Concentration (ppm)	Cu	Co	Cr	Pb	Ni	Fe	Zn	Mn	Cd
Metal extracted^a	18.5	11.4	123	22.7	55.3		119	229	0.300
Metal extracted^b	18.2	10.3	133	21.8	61.1	29200	114.6	209.8	0.291
Accuracy (± %)	2	9	9	4	11		4	8	3

^aCertified values corresponding to the total extraction of trace metals from the standard reference material BCSS-1.
^bValues of the metals extracted from the standard reference material BCSS-1 in the present study.