Prev. Article Next Article Table of Contents

Article

Using Square Wave Voltammetry on Ultramicroelectrodes To Determine Synthetic Antioxidants in Vegetable Oils

Claudio D. Ceballos

Departamento de Ciencias Básicas y Departamento de Tecnología Química, Facultad de Ingeniería, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba, Argentina

María A. Zón and Héctor Fernández

Departamento de Química, Facultad de Ciencas Exactas, Fisico-Químicas y Naturales, Universidad Nacional de Río Cuarto, (5800)–Río Cuarto, Córdoba, Argentina

J. Chem. Educ., 2006, 83 (9), p 1349

DOI: 10.1021/ed083p1349

Publication Date (Web): September 1, 2006

Abstract

An experiment that combines essential concepts of chemical extraction, the standard-addition method, and electroanalytical techniques is reported. The determination of a synthetic antioxidant (t-butylhydroxytoluene, BHT) added to a commercial vegetable oil sample is used to perform the laboratory experiment. BHT is extracted with a nonaqueous solvent (acetonitrile, ACN) in several successive steps. Its quantification is performed by square wave voltammetry (SWV) at a carbon fiber ultramicroelectrode (UME). The analysis is based on the standard-addition method on samples obtained from extract solutions in the 0.1 M H₂SO₄/ACN reaction medium. Students obtain experience in different aspects of experimental chemistry working on a real matrix. This undergraduate chemical instrumental experiment is appropriate for a course on chemical instrumentation.

Keywords:

Graduate Education / Research

Keywords:

Analytical Chemistry

Keywords:

Hands-On Learning / Manipulatives

Keywords:

Applications of Chemistry

View: Hi-Res PDF | PDF w/ Links

Citing Articles

Citation data is made available by participants in CrossRef's Cited-by Linking service. For a more comprehensive list of citations to this article, users are encouraged to perform a search in SciFinder.

This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Gold Electrodes Modified with Self-Assembled Monolayers for Measuring L-Ascorbic Acid: An Undergraduate Analytical Chemistry Laboratory Experiment
Takashi Ito , D. M. Neluni T. Perera and Shinobu Nagasaka
Journal of Chemical Education2008 85 (8), 1112
- Gold Electrodes Modified with Self-Assembled Monolayers for Measuring L-Ascorbic Acid: An Undergraduate Analytical Chemistry Laboratory Experiment
  Takashi Ito , D. M. Neluni T. Perera and Shinobu Nagasaka
  Journal of Chemical Education2008 85 (8), 1112
  This article describes an undergraduate electrochemistry laboratory experiment in which the students measure the L-ascorbic acid content of a real sample. Gold electrodes modified with self-assembled monolayers (SAMs) of thioctic acid and cysteamine are ...
  Abstract | Hi-Res PDF | PDF w/ Links

Tools

SciFinder Links

Explore by:

Author of this Article Any Author Research Topic

History

Received: August 03, 2009

Recommend & Share

Related Content

Measuring Vitamin C Content of Commercial Orange Juice Using a Pencil Lead ElectrodeJournal of Chemical Education
- Measuring Vitamin C Content of Commercial Orange Juice Using a Pencil Lead Electrode
  David King, Jeffrey Friend and James Kariuki
  Journal of Chemical Education 2010 87 (5), pp 507–509
  Abstract: A pencil lead successfully served as an electrode for the determination of ascorbic acid in commercial orange juice. Cyclic voltammetry was used as an electrochemical probe to measure the current produced from the oxidation of ascorbic acid with a variety ...
  Abstract | Full Text HTML | PDF w/ Links | Hi-Res PDF
Layer-by-Layer Assembly of a pH-Responsive and Electrochromic Thin FilmJournal of Chemical Education
- Layer-by-Layer Assembly of a pH-Responsive and Electrochromic Thin Film
  Daniel J. Schmidt, Eric M. Pridgen, Paula T. Hammond and J. Christopher Love
  Journal of Chemical Education 2010 87 (2), pp 208–211
  Abstract: This article summarizes an experiment on thin-film fabrication with layer-by-layer assembly that is appropriate for undergraduate laboratory courses. The purpose of this experiment is to teach students about self-assembly in the context of thin films and ...
  Abstract | Full Text HTML | PDF w/ Links | Hi-Res PDF

1155 Sixteenth Street N.W., Washington, DC 20036

ACS Publications is a partner of:

Technology Partner - Atypon

#qs-wrap {display: none !important;}

Because you do not have JavaScript enabled, the Quick Search functionality is not displayed here. Please enable JavaScript or use the Advanced Search Page.

Article

Using Square Wave Voltammetry on Ultramicroelectrodes To Determine Synthetic Antioxidants in Vegetable Oils

Abstract

Keywords:

Keywords:

Keywords:

Keywords:

Citing Articles

Gold Electrodes Modified with Self-Assembled Monolayers for Measuring L-Ascorbic Acid: An Undergraduate Analytical Chemistry Laboratory Experiment

Gold Electrodes Modified with Self-Assembled Monolayers for Measuring L-Ascorbic Acid: An Undergraduate Analytical Chemistry Laboratory Experiment

Tools

SciFinder Links

History

Recommend & Share

Related Content

Measuring Vitamin C Content of Commercial Orange Juice Using a Pencil Lead Electrode

Layer-by-Layer Assembly of a pH-Responsive and Electrochromic Thin Film

JOURNALS

BOOKS

TOOLS

MAGAZINES

COMMUNITIES

DIRECTORIES & DATABASES