An efficient mercapto-functionalized organic–inorganic hybrid sorbent for selective separation and preconcentration of antimony(iii) in water samples. Issue 10 (29th January 2018)

• Record Type: Journal Article
• Authors: You, Nan; Liu, Tian-Hong; Fan, Hong-Tao; Shen, Hua
• Is Part Of: RSC advances. Volume 8:Issue 10(2018)
• Page Start: 5106
• Page End: 5113
• Publication Date: 2018-01-29
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra13074k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : This work reported on the application of mercapto-functionalized silica-supported organic–inorganic hybrid sorbent as a solid phase extraction (SPE) extractant for effective separation and preconcentration of Sb(iii ) species in real water samples. Abstract : This work reported on the application of mercapto-functionalized silica-supported organic–inorganic hybrid sorbent as a solid phase extraction (SPE) extractant for effective separation and preconcentration of Sb(iii ) species in real water samples. The influences of pH, sorbent amounts, flow rates and the concentration of eluent on the adsorption and desorption of Sb(iii ) species had been evaluated. The recovery of Sb(iii ) species at pH 5 with 100 mg mercapto-functionalized hybrid sorbent at the flow rate of 5.0 mL min −1 was greater than 95% without interference from all of metal ions tested. The trapped Sb(iii ) species by extractant was then eluted with 5% HCl solution at the flow rate of 5.0 mL min −1 . The proposed procedure permitted large enrichment factors of about 200 and higher for 10 μg L −1 of Sb(iii ) species. The merits of analytical figures for the determination of Sb(iii ) species were as follows: detection limit (3 σ, n = 11), 2 ng L −1 ; precision, 1.6% ( n = 11) for 10 μg L −1 of Sb(iii ) species; the linear calibration curve presented in the concentration range of 1.0–200.0 μg L −1 . The validity of the proposed procedure was checked by the analysis of standard reference materials. Excellent agreement between the analytical results and the certified values ( t -test at 95% confidence level) was found. The mercapto-functionalized hybrid sorbent as a SPE extractant was applied to the determination of Sb(iii ) species in various water samples with satisfactory results.