食品科学

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液相色谱-质谱联用法检测马铃薯中α-茄碱含量

伍慧敏,曾 静,李 美,刘德明,杜 宇,熊兴耀,曾建国   

  1. 1.湖南中医药大学药学院,湖南 长沙 410208;2.湖南农业大学 国家作物种质创新与资源利用重点实验室培育基地,湖南 长沙 410128;3.湖南省中药提取工程研究中心,湖南 长沙 410331
  • 出版日期:2013-12-25 发布日期:2014-01-03

Determination of α-solanine in Potato Using Liquid Chromatography-Mass Spectrometry

WU Hui-min,ZENG Jing,LI Mei,LIU De-ming,DU Yu,XIONG Xing-yao,ZENG Jian-guo   

  1. 1. College of Pharmacy, Hunan University of Traditional Chinese Medicine, Changsha 410208, China;
    2. Pre-State Key Laboratory for Germplasm Innovation and Resource Utilization of Crops, Hunan Agricultural University,
    Changsha 410128, China;3. Hunan Engineering Research Center of Botanical Extract, Changsha 410331, China
  • Online:2013-12-25 Published:2014-01-03

摘要:

目的:建立基于液相色谱-质谱联用法的马铃薯中低含量的α-茄碱的高灵敏检测方法。方法:马铃薯用1%甲酸-甲醇(1:1,V/V)超声提取50min。采用C18色谱柱(2.1mm×150mm,5μm)分离,流动相为乙腈-0.1%甲酸(V/V),梯度洗脱,柱温35℃,流速0.2mL/min;采用液相色谱-电喷雾离子源单四极杆质谱检测。结果:α-茄碱在7~460μg/kg范围内与峰面积具有良好的线性关系,回归系数R2=0.9991,平均加标回收率为93.6%,精密度为1.13%,重复性为2.59%。结论:该检测方法灵敏度高、重复性好,可用于马铃薯中低含量α-茄碱的含量测定。

关键词: 马铃薯, 龙葵素, &alpha, -茄碱, 液相色谱-质谱联用法

Abstract:

Objective: To establish a sensitive method to determine micro amounts of α-solanine in potato using liquid
chromatograph-mass spectrometry (LC-MS). Methods: Potato samples were extracted with 1% formic acid-methanol
(1:1, V/V) in combination with ultrasonic assistance for 50 min. Separation of the extracts was performed on a C18
column (2.1 mm × 150 mm, 5 μm). The mobile phase consisted of acetonitrile and 0.1% formic acid. Gradient elution was
performed at column temperature of 35 ℃ with a flow rate of 0.2 mL/min. The pooled eluate was detected by electrospray ionization
mass spectrometry. Results: The regression coefficient of α-solanine was 0.9991 in the range of 7–460 μg/kg. The average recovery
rate was 93.6%. The precision as repeatability and reproducibility were 1.13% and 2.59%, respectively. Conclusion: This method is
simple, accurate, repeatable and applicable to determine micro amounts of α-solanine in potato.

Key words: potato (Solanum tuberosum L.);solanine;&alpha, -solanine;liquid chromatography-mass spectrometry (LC-MS)