Publication:
Determination of trace heavy metals in herbs by sequential injection analysis-anodic stripping voltammetry using screen-printed carbon nanotubes electrodes

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Issued Date

2010

Resource Type

Article

File Type

application/pdf

ISSN

32670

DOI

10.1016/j.aca.2010.01.018

Other identifier(s)

2-s2.0-77952669111

Rights Holder(s)

มหาวิทยาลัยศรีนครินทรวิโรฒ

Bibliographic Citation

Analytica Chimica Acta. Vol 668, No.1 (2010), p.54-60

Suggested Citation

Injang U., Noyrod P., Siangproh W., Dungchai W., Motomizu S., Chailapakul O. Determination of trace heavy metals in herbs by sequential injection analysis-anodic stripping voltammetry using screen-printed carbon nanotubes electrodes. Analytica Chimica Acta. Vol 668, No.1 (2010), p.54-60. doi:10.1016/j.aca.2010.01.018 Retrieved from: https://hdl.handle.net/20.500.14740/7592

Title

Determination of trace heavy metals in herbs by sequential injection analysis-anodic stripping voltammetry using screen-printed carbon nanotubes electrodes

Author(s)

Injang U.
 Noyrod P.
 Siangproh W.
 Dungchai W.
 Motomizu S.
 Chailapakul O.

Abstract

A method for the simultaneous determination of Pb(II), Cd(II), and Zn(II) at low μgL-1 concentration levels by sequential injection analysis-anodic stripping voltammetry (SIA-ASV) using screen-printed carbon nanotubes electrodes (SPCNTE) was developed. A bismuth film was prepared by in situ plating of bismuth on the screen-printed carbon nanotubes electrode. Operational parameters such as ratio of carbon nanotubes to carbon ink, bismuth concentration, deposition time and flow rate during preconcentration step were optimized. Under the optimal conditions, the linear ranges were found to be 2-100μgL-1 for Pb(II) and Cd(II), and 12-100μgL-1 for Zn(II). The limits of detection (Sbl/S=3) were 0.2μgL-1 for Pb(II), 0.8μgL-1 for Cd(II) and 11μgL-1 for Zn(II). The measurement frequency was found to be 10-15stripping cycleh-1. The present method offers high sensitivity and high throughput for on-line monitoring of trace heavy metals. The practical utility of our method was also demonstrated with the determination of Pb(II), Cd(II), and Zn(II) by spiking procedure in herb samples. Our methodology produced results that were correlated with ICP-AES data. Therefore, we propose a method that can be used for the automatic and sensitive evaluation of heavy metals contaminated in herb items. © 2010 Elsevier B.V.

Subject(s)

Anodic stripping voltammetry
 Bismuth film
 Carbon ink
 Concentration levels
 Deposition time
 High sensitivity
 High throughput
 ICP-AES
 In-situ
 Limits of detection
 Linear range
 Measurement frequency
 Online monitoring
 Operational parameters
 Optimal conditions
 Pre-concentration
 Screen-printed
 Sequential injection analysis
 Simultaneous determinations
 Trace heavy metals
 Atomic emission spectroscopy
 Bioelectric phenomena
 Bismuth
 Chemical vapor deposition
 Electrodes
 Lead
 Metal analysis
 Metals
 Optimization
 Stripping (dyes)
 Trace analysis
 Trace elements
 Voltammetry
 Zinc
 Zinc compounds
 Carbon nanotubes
 Bismuth
 Cadmium
 Carbon nanotube
 Lead
 Zinc
 Anodic stripping potentiometry
 Article
 Concentration (parameters)
 Controlled study
 Electrode
 Flow rate
 Herb
 Priority journal
 Sensitivity analysis
 Sequential injection analysis
 Andrographis
 Bismuth
 Cadmium
 Electrochemical Techniques
 Electrodes
 Flow Injection Analysis
 Lead
 Metals, Heavy
 Nanotubes, Carbon
 Plant Leaves
 Zinc
 Sia

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URI

https://hdl.handle.net/20.500.14740/7592

Collections

Scopus: Year 1983-2021

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