, Volume 82, Issue 10, pp 1515–1521 | Cite as

Application of Needle Trap Device Based on the Carbon Aerogel for Trace Analysis of n-Hexane in Air Samples

  • Vahid Jalili
  • Rezvan ZendehdelEmail author
  • Ahmadreza Bahramian
  • Abdullah Barkhordari


Occupational exposure to the solvents causes serious risk to human health. Normal hexane (n-hexane) is a solvent used in oil extraction, glues, and cleaners. According to international methods, it is suggested to use a charcoal tube for sampling of n-hexane in the air of workplaces. In this research, the application of a needle trap device containing carbon aerogel nanoparticles (CA-NTD) was investigated in the sampling and analysis of n-hexane in air samples. The NTD was filled with 5 mg of carbon aerogel between two layers of glass wool in a 21-gauge stainless steel needle. Then, the CA-NTD was optimized for n-hexane analysis of the sampling breakthrough, time, and desorption temperature. The performance of this method was confirmed with respect to its accuracy, precision, limit of detection, and limit of quantification. A breakthrough level of n-hexane transmission from the back to front needles occurred in volumes higher than 400 mL. The results showed that, 60-s after inserting the NTD in the injector port, no gas chromatography response was found, and the extraction efficiency was higher than 99%. Moreover, the inter-day and intra-day reproducibility was estimated with a coefficient variation lower than 5%. The detection limits of the CA-NTD were obtained on 0.013 µg L−1. The CA-NTD was found to be an effective active sampler for determining n-hexane in air samples, and also CA-NTD analysis is recommended as an alternative trace analysis method of n-hexane.


Needle trap device Carbon aerogel n-Hexane 



This study was funded by Shahid Beheshti University of Medical Sciences (Grant no. 30529), and authors thank for financial support for this research.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

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


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Vahid Jalili
    • 1
  • Rezvan Zendehdel
    • 1
    • 4
    Email author
  • Ahmadreza Bahramian
    • 2
  • Abdullah Barkhordari
    • 3
  1. 1.Department of Occupational Hygiene, School of Public Health and SafetyShahid Beheshti University of Medical SciencesTehranIran
  2. 2.Polymer Engineering Department, Faculty of Chemical EngineeringTarbiat Modares UniversityTehranIran
  3. 3.Department of Occupational Health Engineering, School of Public HealthShahroud University of Medical SciencesShahroudIran
  4. 4.College of Public Health and SafetyShahid Beheshti University of Medical SciencesTehranIran

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