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

Table 1

Effect of foreign ions on the recovery of 5 μg of silver ions from 100 mL of aqueous solution.

Foreign ion	Mole ratio (M^𝑛+/Ag^+)	Recovery (%)
K^+	1000	102.1±3.1
Na^+	1000	99.9±1.5
Mg^2+	1000	100.3±1.4
Ca^2+	1000	99.7±3.5
Ba^2+	1000	99.2±1.9
Zn^2+	1000	99.4±2.6
Co^2+	1000	102.8±1.4
Ni^2+	1000	99.5±1.0
Pb^2+	1000	98.1±3.3
Cu^2+	1000	97.7±2.1
NO3^−	1000	97.6±2.8
CH3COO^−	1000	99.6±3.0
SO4^2−	500	99.1±2.1
Cr^3+	500	99.0±2.0
Cd^2+	500	99.3±2.9
Fe^3+	500	104.3±1.8
Cl^−	50	99.2±1.0
Hg^2+	30	97.3±1.0