Thermal Lens Spectroscopy for Quantitative Determination of a Cu(II) Complex With an 8-Aminoquinoline Derivative in Tap Water and Mining Wastewater Samples Using a Dual Beam Technique. (2nd November 2019)

• Record Type: Journal Article
• Authors: Saavedra, Renato; Soto, César; Poza, Cristian
• Is Part Of: Analytical letters. Volume 52:Number 16(2019)
• Page Start: 2607
• Page End: 2619
• Publication Date: 2019-11-02
• Subjects: Aminoquinolines -- metals -- tap water -- thermal lens spectroscopy -- wastewater; Chemistry, Analytic -- Periodicals; Chemistry, Analytic -- Abstracts; 543
• DOI: 10.1080/00032719.2019.1620761
• Languages: English
• ISSNs: 0003-2719

Abstract

Abstract: This article describes the quantitative determination of Cu(II) using thermal lens spectrometry. The chromogenic reaction involving Cu(II) and 5-(4-sulphophenylazo)-8-aminoquinoline in alkaline solution was studied in different experimental conditions such as pH, ligand concentration, methanol volume, and presence of interfering ions. A collinear dual beam set-up has been used for direct quantitation in water samples without a pre-concentration step. The optimized conditions provided a linear calibration in the concentration range from 3.0 to 15.0 × 10 −7 mol L −1 . The detection and quantitation limits were 6.13 × 10 −8 and 2.04 × 10 −7 mol L −1, respectively. Resultantly, an application to Cu(II) determination in tap water (recovery 99.8–103.3%) and mining (synthetic) wastewater (95.3–98.0%) shows relative SDs ≤ 3.1%. The method is presented as a new alternative for the direct Cu(II) determination in real samples.