Solid Phase Extraction of Inorganic Mercury Using 5-Phenylazo-8-hydroxyquinoline and Determination by Cold Vapor Atomic Fluorescence Spectroscopy in Natural Water Samples

Table 11

Simultaneous determination of metals in natural water samples by ICP-MS at pH 4.

Water samples	Element	Concentration µg L^−1		Recovery (%)
		Added	Found^a
Tap water	V	0	0,320 ± 0,106
		2	2,315 ± 0,21	99,8
	Co	0	0,059 ± 0,004
		2	2,041 ± 0,02	99,1
	Ni	0	4,392 ± 0,037
		2	6,172 ± 0,05	96,5
	Cu	0	0,762 ± 0,137
		2	2,759 ± 0,32	99,9
River water	V	0	0,606 ± 0,428
		2	2,602 ± 0,52	99,8
	Co	0	0,041 ± 0,014
		2	2,030 ± 0,05	99,4
	Ni	0	2,964 ± 0,377
		2	4,790 ± 0,52	96,4
	Cu	0	0,066 ± 0,42
		2	2,065 ± 0,32	99,9

aThe value following “±” is the standard deviation (𝑛=2).