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Thermodynamic Studies on the Adsorption of 4-Octylphenol on Carboxen by GC/MS Analysis

GC/MS 분석에 의한 4-Octylphenol의 Carboxen 흡착에 대한 열역학적 연구

  • Lee, Joon-Bae (Daejeon Institute, National Forensic Service) ;
  • Park, Woo-Yong (Daejeon Institute, National Forensic Service) ;
  • Shon, Shungkun (Dept. of Forensic Sci., Daejeon Health Institute of Technology) ;
  • Jung, Ji Eun (Daejeon Institute, National Forensic Service) ;
  • Jeong, Yong Ae (Daejeon Institute, National Forensic Service) ;
  • Gong, Bokyoung (Forensic Chemistry Division, National Forensic Service) ;
  • Kim, Yu-Na (Forensic Chemistry Division, National Forensic Service) ;
  • Kwon, O-Seong (Daejeon Institute, National Forensic Service) ;
  • Paeng, Ki Jung (Department of Chemistry, Yonsei University)
  • 이준배 (국립과학수사연구원 대전과학수사연구소) ;
  • 박우용 (국립과학수사연구원 대전과학수사연구소) ;
  • 손성건 (대전보건대학교 과학수사과) ;
  • 정지은 (국립과학수사연구원 대전과학수사연구소) ;
  • 정용애 (국립과학수사연구원 대전과학수사연구소) ;
  • 공보경 (국립과학수사연구원 법화학과) ;
  • 김유나 (국립과학수사연구원 법화학과) ;
  • 권오성 (국립과학수사연구원 대전과학수사연구소) ;
  • 팽기정 (연세대학교 화학과)
  • Received : 2018.04.17
  • Accepted : 2018.05.12
  • Published : 2018.06.10

Abstract

It is common to analyze volatile organic compound (VOC) or semi-VOC (SVOC) in a sample composed of a complex matrix consisting of multiple components such as bloods through a separation process. Adsorption is a physical phenomenon in which certain components accumulate on the surface of other phases. In order to overcome difficulties in the pretreatment process, an adsorption is frequently used. Solid phase microextraction (SPME) equipment with porous carbon carboxen (CAR) is an example of adsorption application. In this study, the adsorption of 4-octylphenol to carboxen was examined. To do so, the extraction efficiency for such solvents as dichloromethane ($CH_2Cl_2$, DCM), ethylacetate ($CH_3COOC_2H_5$, EA) and diethylether ($C_2H_5OC_2H_5$, $Et_2O$) was studied and also the derivatization reaction for 4-octylphenol with reagents of bistrimethylsilyltrifluoroacetamide (BSTFA), methylchloroformate (MCF) and pentafluorobenzylbromide (PFBBr) was compared. The combination of DCM and BSTFA showed good performance thus they were adopted for this study. Thermodynamic adsorption experiments showed that the adsorption process was endothermic and Freundlich isotherm equation was more suitable than Langmuir isotherm. It was also found that the adsorption followed a pseudo-$2^{nd}$ order kinetic model.

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