Development of Graphene Oxide Functionalized Cotton Fiber Based Solid Phase Extraction Combined with Liquid Chromatography-Fluorescence Detection for Determination of Trace Auxins in Plant Samples

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Abstract

In this work, a convenient and sensitive solid phase extraction (SPE) method was developed based on graphene oxide functionalized cotton fiber (GO-CF), a SPE sorbent followed by liquid chromatography-fluorescence detection (LC-FLD) for determination of trace indole acetic acid, indole propionic acid, indole butyric acid and naphthalene acetic acid. GO-CF was synthesized via covalent bonding method on the surface of cotton fiber, and exhibited higher extraction capacity in comparison with that of cotton fiber. The conditions affecting the extraction efficiency, including sample pH, elution solvent, elution volume, extraction time, and sample volume, were optimized to obtain high extraction recoveries. Under optimal conditions, the calibration curves were linear over the concentration ranging from 2 to 200 ng mL−1 with correlation coefficients between 0.9987 and 0.9998 for all the analytes. The limits of detection were lower than 0.371 ng mL−1 for the four auxins. The intra- and inter-day relative standard deviations (RSDs) were less than 3.5 and 7.1%, respectively. The mean recoveries ranged from 73.5 to 105.4% with RSDs lower than 12.6%. The developed GO-CF–SPE–LC-FLD method has been successfully applied to the analysis of four auxins in real plant samples, including mung bean stalk, mung bean sprout, and tobacco leaf samples.

Graphical abstract

Keywords

Graphene oxide Cotton fiber Sample preparation Solid phase extraction Auxin 

Notes

Acknowledgements

This study was funded by the National Natural Science Foundation of China (Grant nos. 21465008, 21265004, and 21665006), the Natural Science Foundation from Guangxi Zhuang Autonomous Region (nos. 2015GXNSFAA139024 and 2015GXNSFFA139005), the Project of High Level Innovation Team and Outstanding Scholar in Guangxi Colleges and Universities (Guijiaoren[2014]49), and the Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection.

Compliance with Ethical Standards

Conflict of interest

The authors declare no conflict of interest.

Ethical approval

This article does not contain any studies with human participants performed by any of the authors.

Informed consent

Informed consent was not applicable.

Supplementary material

10337_2018_3518_MOESM1_ESM.doc (116 kb)
Supplementary material 1 (DOC 115 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and BioengineeringGuilin University of TechnologyGuilinChina
  2. 2.School of Biomedical EngineeringSouthern Medical UniversityGuangzhouChina

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