色谱 ›› 2016, Vol. 34 ›› Issue (4): 407-413.DOI: 10.3724/SP.J.1123.2015.11038

• 研究论文 • 上一篇    下一篇

磁性固相萃取-高效液相色谱-串联质谱法测定环境水样中的四环素类抗生素

国明, 于峰, 贾科玲, 李姣, 孙海   

  1. 浙江省化工研究院, 浙江杭州 310023
  • 收稿日期:2015-11-23 出版日期:2016-04-08 发布日期:2012-11-16
  • 通讯作者: 于峰
  • 基金资助:

    浙江省公益性技术应用研究(分析测试)项目(2014C37090).

Determination of tetracycline antibiotics in environmental water using magnetic solid phase extraction combined with high performance liquid chromatography- tandem mass spectrometry

GUO Ming, YU Feng, JIA Keling, LI Jiao, SUN Hai   

  1. Zhejiang Research Institute of Chemical Industry, Hangzhou 310023, China
  • Received:2015-11-23 Online:2016-04-08 Published:2012-11-16
  • Supported by:

    Zhejiang Provincial Public Service Technology Applied Research (Analysis Test) Project (No. 2014C37090).

摘要:

建立了磁性固相萃取-高效液相色谱-串联质谱同时测定环境水样中四环素类抗生素的方法。以6种四环素类抗生素(差向四环素、土霉素、四环素、去甲金霉素、金霉素和脱水四环素)为目标化合物,考察并优化了吸附和解吸条件,确定了最佳萃取条件。萃取后的目标化合物经ZORBAX Eclipse Plus C18柱分离,用高效液相色谱-串联质谱在多反应监测(MRM)模式下进行检测。在优化的条件下,6种四环素在1~100 μg/L范围内线性关系良好,线性相关系数为0.9967~0.9993,检出限为2.44~25.21 ng/L,样品加标回收率为80.6%~90.0%,日内相对标准偏差(RSDs)为0.6%~2.5%,日间RSDs为1.1%~7.1%。该方法灵敏度高、背景干扰低,适用于环境水样中6种痕量四环素类抗生素的同时检测。

关键词: 磁性固相萃取, 高效液相色谱-串联质谱, 环境水样, 四环素类抗生素

Abstract:

A method has been developed for the simultaneous determination of tetracycline antibiotics in environmental water by magnetic solid phase extraction and high performance liquid chromatography-tandem mass spectrometry. Several important parameters affecting the magnetic solid phase extraction procedure have been optimized for the best recovery. The eluate was analyzed by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) under multiple reaction monitoring (MRM) mode with a ZORBAX Eclipse Plus C18 column. Under the optimized conditions, the six tetracycline antibiotics (4-epitetracycline, oxytetracycline, tetracycline, demclocycline, chlortetracycline, anhydrotetracycline) showed good linearities in the range of 1-100 μg/L with the correlation coefficients of 0.9967-0.9993. The limits of detection (LODs) were in the range of 2.44 ng/L to 25.21 ng/L. The spiked recoveries were 80.6%-90.0%. The intra-day relative standard deviations (RSDs) were 0.6%-2.5%, while the inter-day RSDs were 1.1%-7.1%. The method has low background and high sensitivity. It was successfully applied to the simultaneous determination of the six trace tetracycline antibiotics in environmental water.

Key words: environmental water, high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS), magnetic solid phase extraction, tetracycline antibiotics

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