Sequential injection anodic stripping voltammetry with monosegmented flow and in-line UV digestion for determination of Zn(II), Cd(II), Pb(II) and Cu(II) in water samples

A cost-effective sequential injection system incorporating with an in-line UV digestion for breakdown of organic matter prior to voltammetric determination of Zn(II), Cd(II), Pb(II) and Cu(II) by anodic stripping voltammetry (ASV) on a hanging mercury drop electrode (HMDE) of a small scale voltammet...

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Main Authors: Siriangkhawut W., Grudpan K., Jakmunee J.
Format: Journal
Published: 2017
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79958086586&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/43045
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-430452017-09-28T06:46:39Z Sequential injection anodic stripping voltammetry with monosegmented flow and in-line UV digestion for determination of Zn(II), Cd(II), Pb(II) and Cu(II) in water samples Siriangkhawut W. Grudpan K. Jakmunee J. A cost-effective sequential injection system incorporating with an in-line UV digestion for breakdown of organic matter prior to voltammetric determination of Zn(II), Cd(II), Pb(II) and Cu(II) by anodic stripping voltammetry (ASV) on a hanging mercury drop electrode (HMDE) of a small scale voltammetric cell was developed. A low-cost small scale voltammetric cell was fabricated from disposable pipet tip and microcentrifuge tube with volume of about 3 mL for conveniently incorporated with the SI system. A home-made UV digestion unit was fabricated employing a small size and low wattage UV lamps and flow reactor made from PTFE tubing coiled around the UV lamp. An in-line single standard calibration or a standard addition procedure was developed employing a monosegmented flow technique. Performance of the proposed system was tested for in-line digestion of model water samples containing metal ions and some organic ligands such as strong organic ligand (EDTA) or intermediate organic ligand (humic acid). The wet acid digestion method (USEPA 3010a) was used as a standard digestion method for comparison. Under the optimum conditions, with deposition time of 180 s, linear calibration graphs in range of 10-300 μg L -1 Zn(II), 5-200 μg L -1 Cd(II), 10-200 μg L -1 Pb(II), 20-400 μg L -1 Cu(II) were obtained with detection limit of 3.6, 0.1, 0.7 and 4.3 μg L -1 , respectively. Relative standard deviation were 4.2, 2.6, 3.1 and 4.7% for seven replicate analyses of 27 μg L -1 Zn(II), 13 μg L -1 Cd(II), 13 μg L -1 Pb(II) and 27 μg L -1 Cu(II), respectively. The system was validated by certified reference material of trace metals in natural water (SRM 1640 NIST). The developed system was successfully applied for speciation of Cd(II) Pb(II) and Cu(II) in ground water samples collected from nearby zinc mining area. © 2011 Elsevier B.V. All rights reserved. 2017-09-28T06:46:39Z 2017-09-28T06:46:39Z 2011-06-15 Journal 00399140 2-s2.0-79958086586 10.1016/j.talanta.2011.03.082 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79958086586&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/43045
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
description A cost-effective sequential injection system incorporating with an in-line UV digestion for breakdown of organic matter prior to voltammetric determination of Zn(II), Cd(II), Pb(II) and Cu(II) by anodic stripping voltammetry (ASV) on a hanging mercury drop electrode (HMDE) of a small scale voltammetric cell was developed. A low-cost small scale voltammetric cell was fabricated from disposable pipet tip and microcentrifuge tube with volume of about 3 mL for conveniently incorporated with the SI system. A home-made UV digestion unit was fabricated employing a small size and low wattage UV lamps and flow reactor made from PTFE tubing coiled around the UV lamp. An in-line single standard calibration or a standard addition procedure was developed employing a monosegmented flow technique. Performance of the proposed system was tested for in-line digestion of model water samples containing metal ions and some organic ligands such as strong organic ligand (EDTA) or intermediate organic ligand (humic acid). The wet acid digestion method (USEPA 3010a) was used as a standard digestion method for comparison. Under the optimum conditions, with deposition time of 180 s, linear calibration graphs in range of 10-300 μg L -1 Zn(II), 5-200 μg L -1 Cd(II), 10-200 μg L -1 Pb(II), 20-400 μg L -1 Cu(II) were obtained with detection limit of 3.6, 0.1, 0.7 and 4.3 μg L -1 , respectively. Relative standard deviation were 4.2, 2.6, 3.1 and 4.7% for seven replicate analyses of 27 μg L -1 Zn(II), 13 μg L -1 Cd(II), 13 μg L -1 Pb(II) and 27 μg L -1 Cu(II), respectively. The system was validated by certified reference material of trace metals in natural water (SRM 1640 NIST). The developed system was successfully applied for speciation of Cd(II) Pb(II) and Cu(II) in ground water samples collected from nearby zinc mining area. © 2011 Elsevier B.V. All rights reserved.
format Journal
author Siriangkhawut W.
Grudpan K.
Jakmunee J.
spellingShingle Siriangkhawut W.
Grudpan K.
Jakmunee J.
Sequential injection anodic stripping voltammetry with monosegmented flow and in-line UV digestion for determination of Zn(II), Cd(II), Pb(II) and Cu(II) in water samples
author_facet Siriangkhawut W.
Grudpan K.
Jakmunee J.
author_sort Siriangkhawut W.
title Sequential injection anodic stripping voltammetry with monosegmented flow and in-line UV digestion for determination of Zn(II), Cd(II), Pb(II) and Cu(II) in water samples
title_short Sequential injection anodic stripping voltammetry with monosegmented flow and in-line UV digestion for determination of Zn(II), Cd(II), Pb(II) and Cu(II) in water samples
title_full Sequential injection anodic stripping voltammetry with monosegmented flow and in-line UV digestion for determination of Zn(II), Cd(II), Pb(II) and Cu(II) in water samples
title_fullStr Sequential injection anodic stripping voltammetry with monosegmented flow and in-line UV digestion for determination of Zn(II), Cd(II), Pb(II) and Cu(II) in water samples
title_full_unstemmed Sequential injection anodic stripping voltammetry with monosegmented flow and in-line UV digestion for determination of Zn(II), Cd(II), Pb(II) and Cu(II) in water samples
title_sort sequential injection anodic stripping voltammetry with monosegmented flow and in-line uv digestion for determination of zn(ii), cd(ii), pb(ii) and cu(ii) in water samples
publishDate 2017
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79958086586&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/43045
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