Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (3): 405-414.DOI: 10.19894/j.issn.1000-0518.230216

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Determination of 2′-Fucosylactose and Lacto-N-Neotetraose Contents in Infant Formula by High Performance Anion Exchange Chromatography-Pulsed Amperometric Detector

Sheng-Qun ZHAN, Cheng GE(), Rong-Jie ZHOU, Jun ZHOU   

  1. Ausnutria Dairy (China) Co. Ltd. ,Changsha 410200,China
  • Received:2023-07-26 Accepted:2023-11-13 Published:2024-03-01 Online:2024-04-09
  • Contact: Cheng GE
  • About author:873685937@qq.com

Abstract:

Simultaneous determination of 2'-fucosylactose and lacto-N-neotetraose in infant formula milk powder by ion chromatography is studied. These 2 human milk oligosaccharides (HMOs) are separated by ion chromatography, and determined by pulse amperometric detector, and quantified using an external standard method. The method is optimized through analyzing different purification methods, enzymatic hydrolysis treatment, different elution conditions, and the linear range. The effects of determining chromatographic conditions and pre-treatment conditions on separation are compared. The results show that the optimized method has a good linear relationship, with R2>0.999. It also has good precision and accuracy, which the relative standard deviation (n=7) is <2.7%, and the recoveries of 2'-fucose lactose and lacto-N-neotetraose are 95.97%~103.38% and 100.09%~104.01%, respectively. This method can simultaneously determine 2'-fucose and lacto-N-neotetraose in infant formula milk powder. It is simple to operate, has good accuracy and precision, and can provide reference for the quality control method of infant formula milk powder.

Key words: Human milk oligosaccharides, Ion chromatography, 2'-Fucosylactose, Lactose-N-neotetraose, Infant milk powder

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