Chinese Journal of Chromatography ›› 2016, Vol. 34 ›› Issue (7): 692-696.DOI: 10.3724/SP.J.1123.2016.02011

• Special Column on Progress of Aptamers Selection against Multiscale Targets • Previous Articles     Next Articles

Simultaneous determination of eight vitamin E isomers and vitamin A in foods by normal-phase high performance liquid chromatography

ZHENG Yibin2, HUANG Baifen1, REN Yiping1   

  1. 1. Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China;
    2. School of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
  • Received:2016-02-17 Online:2016-07-08 Published:2013-02-05

Abstract:

A synchronous detection method was established by normal-phase (NP)-HPLC to separate and determine eight vitamin E isomers and vitamin A in foods. The sample was pretreated and then separated on a Waters ACQUITYTM UPLC BEH Amide column (150 mm×3.0 mm, 1.7 μm). The mobile phase consisted of hexane (A, 90%) and tert-butyl methyl ether-tetrahydrofuran-methanol (20 : 10 : 1, v/v/v) (B, 10%). The analytes were detected by UV and fluorescence detectors, identified and quantified with external standards. The linear ranges of tocopherols were from 5.0 mg/L to 60.0 mg/L (r2≥0.9999), and those of tocotrienols and vitamin A were from 0.5 mg/L to 6.0 mg/L (r2≥0.9996), while the LODs of vitamin E isomers and vitamin A were from 20 μg/kg to 60 μg/kg. The method is of high precision, stability and repeatability, and the recoveries were from 79.2% to 114.2%. This method is simple, accurate and suitable for the analysis of vitamin E isomers and vitamin A in foods.

Key words: foods, high performance liquid chromatography (HPLC), vitamin A (VA), vitamin E (VE) isomers

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