Flame Atomic Absorption Spectrometric Determination of Trace Amounts of Silver after Solid-Phase Extraction with 2-Mercaptobenzothiazole Immobilized on Microcrystalline Naphthalene

Table 2

Determination of silver in water samples and radiology film.

Samples	Added/𝜇g L^−1	Found^a/𝜇g L^−1	Recovery (%)	GFAAS^a/μg L^−1
Well water	0	1.71±0.11	—	1.68±0.06
	10	11.50±0.36	97.9	—
Rain water	0	1.86±0.15	—	1.91±0.08
	10	11.78±0.23	99.2	—
River water	0	4.21±0.12	—	4.16±0.19
	10	14.15±0.18	99.4	—
Spring water	0	4.28±0.10	—	4.47±0.16
	10	14.23±0.27	99.5	—
Waste water	0	10.25±0.35	—	10.16±0.45
	10	20.06±0.54	98.1	—
Radiology film^b	0	2.11±0.16	—	2.18±0.23
	1	3.07±0.35	96.0	—

aMean and standard deviation of three independent determinations; ^bmg g⁻¹.