色谱 ›› 2014, Vol. 32 ›› Issue (10): 1094-1103.DOI: 10.3724/SP.J.1123.2014.08010

• 研究论文 • 上一篇    下一篇

基于在线富集与原位衍生技术的植物组织中内源性油菜素甾醇的超高效液相色谱-串联质谱分析方法

丁俊1,2, 蒋丽1, 冯钰锜1   

  1. 1. 生物医学分析化学教育部重点实验室, 武汉大学化学与分子科学学院, 湖北 武汉 430072;
    2. 中国科学院植物种质创新与特色农业重点实验室, 中国科学院武汉植物园, 湖北 武汉 430074
  • 收稿日期:2014-08-13 出版日期:2014-10-08 发布日期:2014-09-29
  • 通讯作者: 冯钰锜,E-mail:yqfeng@whu.edu.cn
  • 基金资助:

    国家自然科学基金项目(91017013,91217309).

An automatic and sensitive method for the determination of endogenous brassinosteroids in plant tissues by an online trapping-in situ derivatization-ultra performance liquid chromatography-tandem mass spectrometry system

DING Jun1,2, JIANG Li1, FENG Yuqi1   

  1. 1. Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China;
    2. Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of Chinese Academy of Sciences, Wuhan 430074, China
  • Received:2014-08-13 Online:2014-10-08 Published:2014-09-29

摘要:

油菜素甾醇是一类重要的植物激素,对植物的生长发育过程起显著调节作用。已报道的油菜素甾醇分析方法存在样品前处理过程复杂和灵敏度低等问题。本研究采用C18 PEEK管填充柱为富集柱,以4-NN-二甲氨基苯硼酸为衍生试剂,搭建了基于双泵-双六通阀的在线管内固相微萃取-超高效液相色谱-串联质谱(UPLC-MS/MS)联用系统,对油菜素甾醇进行在线富集和原位衍生,实现植物组织中内源性油菜素甾醇的自动化分析。该系统程序化地控制了油菜素甾醇的进样、萃取、衍生、分离和检测过程,有效简化前处理过程,节省人力;在线富集步骤实现了样品溶液大体积进样,提高样品利用率;原位衍生改善了油菜素甾醇电喷雾的离子化效率,使油菜素甾醇的电喷雾质谱检出限降低至pg/mL。该系统可在300 mg鲜重植物组织中检测到内源性油菜素甾醇,已成功用于水稻、油菜中多种油菜素甾醇的定量分析。

关键词: 超高效液相色谱-串联质谱, 油菜素甾醇, 原位衍生, 在线富集, 植物组织

Abstract:

Brassinosteroids (BRs) are a class of naturally occurring phytohormones with polyhydroxy steroid structure, which regulate general plant growth and many physiological processes. The reported methods for BR analysis were complicated, and the detection sensitivity was relatively low. To realize the automatic analysis of trace BRs in limited plant tissues, an in-tube solid phase microextraction-ultra performance liquid chromatography-tandem mass spectrometry (SPME-UPLC-MS/MS) system was constructed based on two valves-two pumps. Using C18 PEEK column as the trapping column and 4-(dimethylamino)phenylboronic acid (4-DMAPBA) as the derivatization reagent, an on line trapping and in situ derivatization assay method of BRs was developed. BRs could be programmed to fulfill the procedures of injection, extraction, derivatization, LC separation and MS detection in the system. The detection limits of BRs were improved more than one order of magnitude by the online trapping and in situ derivatization techniques, thus endogenous BRs could be quantified in only 300 mg plant tissues.

Key words: brassinosteroid, in situ derivatization, online trapping, plant tissues, ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS)

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