Preconcentration of Silver(I) with 2-Mercaptobenzothiazole Loaded Silica Gel
1987; Springer Nature; Volume: 3; Issue: 1 Linguagem: Inglês
10.2116/analsci.3.45
ISSN1348-2246
AutoresMasatoshi Kubota, Ken Matsumoto, Kikuo Terada,
Tópico(s)Electrochemical Analysis and Applications
ResumoA complexing material, 2-mercaptobenzothiazole loaded silica gel (MBT/SG), was prepared for rapid pre-concentration of trace amounts of silver(I) from water samples. Silver(I) was quantitatively retained on the MBT/SG from solution of pH 0–6.3 in batch experiments, while the untreated silica gel captured only 5% of the element in the solution. The retention capacity of the loaded gel was about 8.8 mg Ag g−1 (81.5 μmol g−1) at pH 4.0. The mole ratio of MBT to silver was about 8.3. Stiver was quantitatively retained on the MBT/SG column at a high flow velocity (18.8 cm min−1). The silver retained on the column was completely eluted with 10–15 cm3 of 0.1 mol dm−3 nitric acid containing 2% thiourea, and directly determined by one-drop atomic absorption spectrometry. Silver contents of near-shore seawater were determined by the present method.
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