Chemical Papers

, Volume 71, Issue 11, pp 2095–2105 | Cite as

The separation of diafenthiuron in fresh tea leaves via efficient subcritical fluid approach

  • Ya-Ting Zhang
  • Ji-Zong Zhang
  • Ling-Biao Gu
  • Guang-Yong Qin
Original Paper
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Abstract

In this study, we firstly employed response surface methodology to optimize the extraction conditions for separating diafenthiuron from fresh tea leaves via subcritical fluid extraction. Besides, the surface structure was characterized before and after the extraction. The results revealed that the experimental value was fitted to a second-order polynomial equation and the separation efficiency was estimated to be 92.89%, which is highly enough when applied in the industrial manufacture. Therefore, we performed subcritical fluid extraction experiments in the modified optimal conditions (i.e., 33 °C extraction temperature, 22 min extraction time, and 6.6:1 liquid-to-solid ratio) and measured a related value of 91.65%, consistent with the calculated result. Moreover, the surface structure of the tea leaves was intact after the extraction.

Keywords

Subcritical fluid extraction Response surface methodology Butane Diafenthiuron 
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Notes

Acknowledgements

This research was supported by Foundation of Henan Science and Technology Committee (Grant No. 142300410089).

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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2017

Authors and Affiliations

  • Ya-Ting Zhang
    • 1
  • Ji-Zong Zhang
    • 1
  • Ling-Biao Gu
    • 1
  • Guang-Yong Qin
    • 1
  1. 1.School of Physics and EngineeringZhengzhou UniversityZhengzhouChina

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