浙江农业学报 ›› 2023, Vol. 35 ›› Issue (8): 1896-1903.DOI: 10.3969/j.issn.1004-1524.20221050

• 农产品质量安全 • 上一篇    下一篇

固相萃取-高效液相色谱-质谱联用法测定铁皮石斛中2,4-表芸苔素内酯残留

陆兰菲1,2(), 赵学平2, 马正1, 方楠2, 骆玉琴2, 王晓梅1,2, 叶会2, 雷圆2, 王强1,2,*(), 张昌朋2,*()   

  1. 1.中国计量大学 生命科学学院,浙江 杭州 310018
    2.浙江省农业科学院 农产品质量安全与营养研究所,浙江 杭州 310021
  • 收稿日期:2022-07-15 出版日期:2023-08-25 发布日期:2023-08-29
  • 作者简介:陆兰菲(1988—),女,陕西西安人,硕士研究生,主要研究方向为药品、食品质量与安全。E-mail:lfyx216@163.com
  • 通讯作者: *王强,E-mail: wq13575733860@126.com;张昌朋,E-mail: cpzhang1215@zaas.ac.cn
  • 基金资助:
    浙江省基础公益研究计划(LGN21C140006);“一县一品一策”标准化生产创建(ZJNY2022001-014)

Determination of 2, 4-epibrassinolide residues in Dendrobium officinale by solid phase extraction-high performance liquid chromatography-mass spectrometry

LU Lanfei1,2(), ZHAO Xueping2, MA Zheng1, FANG Nan2, LUO Yuqin2, WANG Xiaomei1,2, YE Hui2, LEI Yuan2, WANG Qiang1,2,*(), ZHANG Changpeng2,*()   

  1. 1. College of Life Sciences, China Jiliang University, Hangzhou 310018, China
    2. Institute of Agro-Products Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2022-07-15 Online:2023-08-25 Published:2023-08-29

摘要:

为建立铁皮石斛中2, 4-表芸苔素内酯的高效、灵敏和准确的残留分析方法,利用超声与涡旋联用方法对铁皮石斛样品进行了提取,然后采用固相萃取小柱(Cleanert Pesti Carb/NH2)方法净化且经HPLC-MS/MS测定。经过方法学验证,2, 4-表芸苔素内酯在铁皮石斛中的定量限和检出限分别为0.005 mg·kg-1和0.000 5 mg·L-1。在0.005~0.5 mg·kg-1的添加范围下,2, 4-表芸苔素内酯在铁皮石斛中的平均回收率为94.70%~102.25%,相对标准偏差为1.3%~3.4%,表明该方法的灵敏度、准确度和精密度均满足铁皮石斛中2, 4-表芸苔素内酯的农药残留分析要求。通过室内盆栽试验,获得了铁皮石斛样品,并利用该方法测定了铁皮石斛样品中2, 4-表芸苔素内酯残留。2, 4-表芸苔素内酯在铁皮石斛中的消解动态符合一级动力学,茎、叶半衰期分别为10.35~22.36 d和8.89~11.00 d,表明该方法能够应用于铁皮石斛实际样品的检测。

关键词: 固相萃取, 高效液相色谱-质谱联用仪, 植物生长调节剂, 铁皮石斛

Abstract:

In order to establish an efficient, sensitive and accurate residue analysis method for 2,4-epibrassinolide in Dendrobium officinale, the samples of Dendrobium officinale were extracted by ultrasonic and vortex coupling, and then cleaned by Cleanert Pesti Carb/NH2and determined by HPLC-MS/MS. This method is clear and colorless after purification, matrix effect is reduced, easy to operate and fast. The limits of quantification and limits of detection of 2,4-epibrassinolide in Dendrobium officinale were 0.005 mg·kg-1and 0.000 5 mg·L-1, respectively. The average recoveries of 2,4-epibrassinolide in Dendrobium officinale were 94.70%-102.25% with the relative standard deviations (RSDs) of 1.3%-3.4% in the spiked range of 0.005-0.5 mg·kg-1. It showed that the sensitivity, accuracy and precision of the method met the requirements for the analysis of pesticide residues of 2,4-epibrassinolide in Dendrobium officinale. The samples of Dendrobium officinale were obtained by indoor pot test, and the method was used to determine the 2, 4-epibrassinolide in the samples of Dendrobium officinale. The digestion dynamics of 2,4-epibrassinolide in Dendrobium officinale conformed to the first-order kinetics, and the half-lives of stem and leaf were 10.35-22.36 d and 8.89-11.00 d, respectively. It showed that this method can be applied to the detection of actual samples of Dendrobium officinale.

Key words: solid phase extraction (SPE), high performance liquid chromatograph-mass spectrometer (HPLC-MS/MS), plant growth regulators, Dendrobium officinale

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