A Comparative Study of 8‐Hydroxyquinoline and 8‐Hydroxyquinoline‐5‐sulfonic Acid for Antimony(III) Determination by AdSV. Substituent Effect on Sensitivity II. Issue 5 (9th March 2015)

• Record Type: Journal Article
• Authors: Rojas‐Romo, Carlos; Arancibia, Verónica
• Is Part Of: Electroanalysis. Volume 27:Issue 5(2015:May)
• Page Start: 1262
• Page End: 1267
• Publication Date: 2015-03-09
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201400616
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A sensitive and selective method for the determination of Sb³⁺ 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; <italic>C</italic>_HQ from 15.0 to 25.0 µmol L⁻¹ and <italic>C</italic>_HQS from 70.0 to 200.0 µmol L⁻¹. The detection limits are 100.0 and 14.0 ng L⁻¹ (<italic>t</italic>_acc=30 s) for Sb³⁺ 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 Sb³⁺ determination.</p> </abstract>