A Critical Evaluation of Single Extractions from the SMT Program to Determine Trace Element Mobility in Sediments

Table 2

Comparison between aqua regia extractable (indicative values) and “3-acid” extractable (this work) concentrations (mg/kg) of Cd, Cr, Cu, Ni, Pb, and Zn in sample BCR 701. Mean ± standard deviation of 3 replicates.

	Indicative values	This work
Cd	11.7±1.0	10.9±0.2
Cr	272±20	284±5
Cu	275±13	242±2
Ni	103±4	99±7
Pb	143±6	141±3
Zn	454±19	465±4