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Journal of Chinese Pharmaceutical Sciences ›› 2022, Vol. 31 ›› Issue (1): 23-30.DOI: 10.5246/jcps.2022.01.003

• Original articles • Previous Articles     Next Articles

Determination of inulin-type fructo-oligosaccharides in inulin by HPLC-ELSD

Xiaoyu Cui1, Pan Wang1, Yidian Mo1, Xuyang Ding1, Shizhong Chen1, Hongzhu Guo2, Qin Hu2,*(), Zhongjun Li1,*()   

  1. 1 State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
    2 Beijing Institute for Drug Control (Beijing Center for Health Food and Cosmetics Control), Beijing 102206, China
  • Received:2021-10-11 Revised:2021-11-05 Accepted:2021-12-21 Online:2022-01-12 Published:2022-01-13
  • Contact: Qin Hu, Zhongjun Li

Abstract:

To develop an HPLC-ELSD method for the determination of nine inulin-type fructo-oligosaccharides in inulin, the HPLC-ELSD system consisted of Waters XBridge? Amide column (4.6 mm × 250 mm, 5 μm) with a gradient elution mobile phase consisting of acetonitrile and water at a flow rate of 1.2 mL/min at 30 oC. The detector was an Agilent Technologies 380-ELSD. The drift tube temperature for the ELSD was set at 55 oC with a nitrogen flow rate of 1.8 L/min. The injection volume was 15 μL. The results showed that the detection range for the nine inulin-type fructo-oligosaccharides was 3.81–30.60 μg R2 = 0.99969 for kestose, 3.73–29.97 μg R2 = 0.99981 for nystose, 3.82–30.69 μg R2 = 0.99993 for fructosylnystose, 3.80–30.48 μg R2 = 0.99995 for GF5, 3.73–29.96 μg R2 = 0.99993 for GF6, 3.78–30.30 μg R2 = 0.99983 for GF7, 3.82–30 μg R2 = 0.99989 for GF8, 3.71–29.80 μg R2 = 0.99974 for GF9, 3.61–29.00 μg R2 = 0.99970 for GF10, respectively. The recovery of the nine oligosaccharides ranged between 96.48%–100.84% (n = 6). The method was simple, accurate, and reproducible that it could be used as an analytical method for evaluating the quality of inulin effectively.

Key words: Inulin, Inulin-type fructo-oligosaccharides, Quantitative determination

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