食品科学 ›› 2010, Vol. 31 ›› Issue (16): 180-183.doi: 10.7506/spkx1002-6630-201016038

• 分析检测 • 上一篇    下一篇

高效液相色谱-蒸发光散射法测定低聚乳果糖的含量

代志凯1,2,廖春龙1,2,印遇龙1,2,3,阮 征1,2,*   

  1. 1.南昌大学 食品科学与技术国家重点实验室 2.南昌大学生命科学与食品工程学院 3.中国科学院亚热带农业生态研究所
  • 收稿日期:2009-11-24 修回日期:2010-05-03 出版日期:2010-08-25 发布日期:2010-12-29
  • 通讯作者: 阮征 E-mail:ezruan@yahoo.com
  • 基金资助:

    南昌大学“赣江学者奖励计划”项目;中国博士后科学基金资助项目(20080440166);
    食品科学与技术国家重点实验室探索项目(SKLF-TS-200817);江西省教育厅项目(GJJ09068)

High-performance Liquid Chromatography with Evaporative Light Scattering Detection for the Determination of Enzymatically Synthesized Lactosucrose

Zheng RUAN   

  1. 1.State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China ;
    2.College of Life Science and Food Engineering, Nanchang University, Nanchang 330031, China;
    3. Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
  • Received:2009-11-24 Revised:2010-05-03 Online:2010-08-25 Published:2010-12-29
  • Contact: Zheng RUAN E-mail:ezruan@yahoo.com

摘要:

目的:建立简便、准确、灵敏地测定酶法合成中低聚乳果糖含量的液相色谱方法。方法:酶法合成低聚乳果糖的溶液经离心后稀释,使用氨基柱分离,乙腈- 水(体积比75:25)为流动相,流速1.0mL/min,蒸发光散射检测器漂移管温度70℃,载气为空气,压力0.35MPa。结果:低聚乳果糖的线性范围为0.1281~4.1000mg/mL(R2=0.9994),最低检出限为0.01mg/mL,平均加标回收率为100.28%,RSD 为3.07%。结论:该方法操作简便、快速、准确,用于酶法合成低聚乳果糖的测定,结果令人满意。

关键词: 高效液相色谱, 蒸发光散射检测器, 低聚乳果糖

Abstract:

Objective: To develop a simple, accurate and sensitive high-performance liquid chromatographic (HPLC) method with evaporative light scattering detection (ELSD) for the determination of enzymatically prepared lactosucrose (LS) in our laboratory. Methods: The reaction product containing LS was centrifugated and the supernatant was diluted and separated on a Kromasil NH2 column using acetonitrile/water (75:25, V/V) mixture as mobile phase. The ELSD drift tube temperature was set at 70 ℃ and the air pressure at 0.35 MPa. Results: The linear range of LS was between 0.1281 mg/mL and 4.1000 mg/mL (R2 = 0.9994). The method detection limit was 0.01 mg/mL. The average spike recovery at 5 levels was 100.28%, with a relative standard deviation (RSD) of 3.07%. Conclusion: This method is simple, fast and accurate, and can be applied to the determination of LS.

Key words: high-performance liquid chromatography, evaporative light scattering detection, lactosucrose

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