Voltammetric detection of arsenic (III) using gold nanoparticles modified carbon screen printed electrodes: Application for facile and rapid analysis in commercial apple juice

Connor Sullivan; Dingnan Lu; Andre Senecal; Pradeep Kurup

doi:10.1016/j.foodchem.2021.129327

Voltammetric detection of arsenic (III) using gold nanoparticles modified carbon screen printed electrodes: Application for facile and rapid analysis in commercial apple juice

Food Chem. 2021 Aug 1:352:129327. doi: 10.1016/j.foodchem.2021.129327. Epub 2021 Feb 23.

Authors

Connor Sullivan¹, Dingnan Lu², Andre Senecal³, Pradeep Kurup⁴

Affiliations

¹ Department of Civil and Environmental Engineering, University of Massachusetts Lowell, Lowell, MA, USA. Electronic address: connor_sullivan1@student.uml.edu.
² Department of Civil and Environmental Engineering, University of Massachusetts Lowell, Lowell, MA, USA. Electronic address: Dingnan_Lu@uml.edu.
³ United States Army Combat Capabilities Development Command, Combat Feeding Directorate, Natick, MA, USA. Electronic address: andre.g.senecal.civ@mail.mil.
⁴ Department of Civil and Environmental Engineering, University of Massachusetts Lowell, Lowell, MA, USA. Electronic address: pradeep_kurup@uml.edu.

PMID: 33690077
DOI: 10.1016/j.foodchem.2021.129327

Abstract

This paper describes a voltammetric method and data analysis program developed for the detection of arsenic(III) in commercial apple juice. Arsenic(III) was detected using square wave stripping voltammetry with gold nanoparticle modified screen printed electrodes. The only sample pretreatment performed was the addition of a 100 mM phosphate buffer with a pH of 7. To compensate for interference from high ascorbic acid concentrations, a data analysis program was developed in MATLAB to fit a non-linear baseline, allowing for accurate peak height measurement. With this data analysis program, the developed methodology had a sensitivity of 0.1007 µA (µg L^-1)^-1 and a limit of detection of 16.73 µg L^-1. A comparison between the voltammetric method and graphite furnace atomic absorption spectroscopy showed no bias in the voltammetric results and a good correlation between the two sets of predicted concentrations, with an R² of 0.939.

Keywords: Arsenic; Juice; Screen printed electrodes; Voltammetry.

MeSH terms

Arsenic / analysis*
Carbon / chemistry*
Electrochemistry / instrumentation*
Electrodes
Food Analysis / instrumentation
Fruit and Vegetable Juices / analysis*
Gold / chemistry*
Malus / chemistry*
Metal Nanoparticles / chemistry*
Printing
Time Factors

Substances

Carbon
Gold
Arsenic