Microchimica Acta

, 186:35 | Cite as

Thin film nanofibers containing ZnTiO3 nanoparticles for rapid evaporation of extraction solvent: application to the preconcentration of chlorpyrifos prior to its quantification by ion mobility spectrometry

  • Mohammad R. Rezayat
  • Mohammad Taghi Jafari
  • Farzaneh Rahmanian
Original Paper


Thin film nanofibers containing ZnTiO3 nanoparticles were used for rapid and efficient evaporation of solvents as used to extract analytes by dispersive liquid-liquid microextraction (DLLME). The method is referred to as thin film evaporation (TFE). A combination of DLLME and TFE was applied to the extraction and preconcentration of the pesticide chlorpyrifos (as a model compound) prior to analysis by ion mobility spectrometry. The ZnTiO3 nanoparticles were placed on polyacrylonitrile nanofibers which increases the porosity and surface area in the TFE process, thus causing fast and complete evaporation of solvents. The effects of sample pH value, extraction solvent and its volume, disperser solvent and volume, centrifugation time, evaporation time, and desorption temperature were optimized. The relative standard deviations of intra- and inter-day analyses were found to be 3% and 7%, respectively. The method has a linear dynamic range that covers the 0.10–3.0 μg.L−1 chlorpyrifos concentration range, the limit of detection is 0.04 μg.L−1, and the enrichment factor is up to 5400 in case of spiked samples. Some spiked field samples were analyzed and the relative recoveries ranged between 99 and 111%. When applied along with ion mobility spectrometry, the interferences caused by solvent are found to be reduced in the ionization source. This makes it possible to select a variety of solvents as needed for sample extraction.

Graphical abstract

Schematic presentation of dispersive liquid-liquid microextraction (DLLME) combined with thin film evaporation (TFE) for rapid vaporization of extraction solvent: Application to the pre-concentration of chlorpyrifos prior to its quantification by corona discharge-ion mobility spectrometry (CD-IMS).


Thin film evaporation Dispersive liquid-liquid microextraction Sample pretreatment Solvent removal IMS technology 



The authors would like to thank the Research Council of Isfahan University of Technology (IUT) and Center of Excellence in Sensor and Green Chemistry, Iran for providing the financial support of this work. Dr. Bahrami is also specially acknowledged for her valuable assistance.

Compliance with ethical standards

The author(s) declare that they have no competing interests.

Supplementary material

604_2018_3167_MOESM1_ESM.docx (146 kb)
ESM 1 (DOCX 145 kb)


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Copyright information

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

Authors and Affiliations

  • Mohammad R. Rezayat
    • 1
  • Mohammad Taghi Jafari
    • 1
  • Farzaneh Rahmanian
    • 1
  1. 1.Department of ChemistryIsfahan University of TechnologyIsfahanIran

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