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Analytical Letters Volume 50, 2017 - Issue 4
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LIQUID CHROMATOGRAPHY

Determination of Synthetic Phenolic Antioxidants in Vegetable Oil and Oil-Enriched Foods by High-Performance Liquid Chromatography with Electrochemical Detection

Zheng SunDepartment of Food Science and Engineering, School of Chemical Engineering, Northwest University, Xi’an, Shaanxi, China;Institute of Analytical Science, Shaanxi Provincial Key Lab of Electroanalytical Chemistry, Northwest University, Xi’an, Shaanxi, China
,
Meng WangDepartment of Food Science and Engineering, School of Chemical Engineering, Northwest University, Xi’an, Shaanxi, China
,
Ni ChengDepartment of Food Science and Engineering, School of Chemical Engineering, Northwest University, Xi’an, Shaanxi, China
,
Hui GaoDepartment of Food Science and Engineering, School of Chemical Engineering, Northwest University, Xi’an, Shaanxi, China
,
Jianjun DengDepartment of Food Science and Engineering, School of Chemical Engineering, Northwest University, Xi’an, Shaanxi, China
,
Jing ZhaoDepartment of Food Science and Engineering, School of Chemical Engineering, Northwest University, Xi’an, Shaanxi, China
&
Wei CaoDepartment of Food Science and Engineering, School of Chemical Engineering, Northwest University, Xi’an, Shaanxi, China;Institute of Analytical Science, Shaanxi Provincial Key Lab of Electroanalytical Chemistry, Northwest University, Xi’an, Shaanxi, ChinaCorrespondence[email protected]
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Pages 607-616 | Received 07 Mar 2016, Accepted 25 May 2016, Published online: 20 Mar 2017
 
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ABSTRACT

Three synthetic phenolic antioxidants, tertiary butyl hydroquinone, butylated hydroxytoluene, and butylated hydroxyanisole, were determined in vegetable oil and oil-enriched food by high-performance liquid chromatography (HPLC) with electrochemical detection. The separation was achieved using a reverse-phase column and gradient elution with methanol and 1% acetic acid. The limits of detection and quantification of the analytes were 2–120 lower, higher than those obtained by diode-array detection. The recoveries were 103.3% for tertiary butyl hydroquinone, 97.3% for butylated hydroxyanisole, and 95.2% for butylated hydroxytoluene. The results showed that HPLC with electrochemical detection is suitable for the quantification of low concentrations of phenolic antioxidants in vegetable oil and oil-enriched food with high sensitivity and accuracy.

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