Table 4.

Dry mass concentrations of Cd determined in SRM 3280 by ID-ICPMS along with residual solution concentrations of Mo and Sn measured in different of Scheme 3. Values are mean ± standard deviation of five separate preparations (n = 5). Values in parenthesis indicate per cent deviation (inaccuracy) from the certified value of Cd and those for Mo and Sn reflect per cent removal of Mo and Sn from SRM 3280 solution.

Step	Analyzed medium	Cd (ng g−1)			Residual Mo (μg mL−1)	Residual Sn (μg mL−1)
		110Cd/113Cd	111Cd/113Cd	114Cd/113Cd
1	Supernatant	129 ± 10	136 ± 9	119 ± 12	1.27 ± 0.30	0.110 ± 0.012
		(+61%)	(+70%)	(+49%)	(76.0%)	(86.7%)
2	Pellet	102 ± 8	112 ± 11	95.6 ± 7.1	0.32 ± 0.08	0.053 ± 0.006
		(+28%)	(+40%)	(+20%)	(93.9%)	(93.6)
3	Pellet	78.8 ± 4.7	77.9 ± 5.2	76.5 ± 4.8	0.018 ± 0.008	0.019 ± 0.004
		(−1.5%)	(−2.6%)	(−4.4%)	(99.6%)	(97.7%)