Sulfur modified with 2-mercaptobenzoxazole as a new sorbent for preconcentration of silver prior to determination by flame atomic absorption spectrometry

A solid-phase extraction method for preconcentration of silver and consequent determination by atomic absorption spectrometry is described. The method is based on the retention of silver on sulfur modified with 2-mercaptobenzoxazole. The retained silver is eluted from the column with a thiourea solu...

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Bibliographic Details
Published in:Journal of the Iranian Chemical Society 2013-04, Vol.10 (2), p.319-324
Main Authors: Pourreza, N., Parham, H., Habibzadeh, F.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Biochemistry
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Organic Chemistry
Original Paper
Physical Chemistry
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Summary:A solid-phase extraction method for preconcentration of silver and consequent determination by atomic absorption spectrometry is described. The method is based on the retention of silver on sulfur modified with 2-mercaptobenzoxazole. The retained silver is eluted from the column with a thiourea solution and determined by flame atomic absorption spectrometry. The preconcentration conditions such as pH, amount of reagent loaded on sorbent, type of eluent and its volume, flow rate and interfering ions were investigated. The calibration graph was linear in the range of 3–200 ng mL −1 of Ag + in the initial solution with r  = 0.9985. The limit of detection based on 3S b was 1.0 ng mL −1 . The relative standard deviation for ten replicate measurements of 50 and 150 ng mL −1 of Ag + was 4.1 and 1.4 %, respectively. The method was applied to the determination of silver in radiology film and water samples.
ISSN:1735-207X
1735-2428
DOI:10.1007/s13738-012-0161-9