A Comparative Study of 8‐Hydroxyquinoline and 8‐Hydroxyquinoline‐5‐sulfonic Acid for Antimony(III) Determination by AdSV. Substituent Effect on Sensitivity II | Zendy

RojasRomo Carlos | Zendy; Arancibia Verónica | Zendy

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A Comparative Study of 8‐Hydroxyquinoline and 8‐Hydroxyquinoline‐5‐sulfonic Acid for Antimony(III) Determination by AdSV. Substituent Effect on Sensitivity II

Author(s) -

RojasRomo Carlos,

Arancibia Verónica

Publication year - 2015

Publication title -

electroanalysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.574

H-Index - 128

eISSN - 1521-4109

pISSN - 1040-0397

DOI - 10.1002/elan.201400616

Subject(s) - 8 hydroxyquinoline , chemistry , sulfonic acid , substituent , antimony , detection limit , medicinal chemistry , nuclear chemistry , chromatography , organic chemistry

A sensitive and selective method for the determination of Sb 3+ based on the formation of its complexes with 8‐hydroxyquinoline (HQ) and 8‐hydroxyquinoline‐5‐sulfonic acid (HQS) is proposed. The best analytical conditions are: pH 5.4 and 2.2 for HQ and HQS, respectively; C HQ from 15.0 to 25.0 µmol L −1 and C HQS from 70.0 to 200.0 µmol L −1 . The detection limits are 100.0 and 14.0 ng L −1 ( t acc =30 s) for Sb 3+ with HQ and HQS, respectively. The method using HQS as ligand has a 2.2‐fold higher sensitivity than that with HQ and the former was chosen for Sb 3+ determination.

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