Determination of VOC in aqueous samples by the combination of headspace (HS) and solid-phase microextraction (SPME)

HS-SPME 방식에 기초한 물 중 VOC 성분의 분석기법에 대한 연구: 3가지 실험 조건의 변화와 분석감도의 관계

  • Park, Shin-Young (Department of Earth and Environmental Science, Sejong University) ;
  • Kim, Ki-Hyun (Department of Earth and Environmental Science, Sejong University) ;
  • Yang, H.S. (Samsung electronics co., LTD. digital appliance division) ;
  • Ha, Joo-Young (Samsung electronics co., LTD. digital appliance division) ;
  • Lee, Ki-Han (Department of Earth and Environmental Science, Sejong University) ;
  • Ahn, Ji-Won (Department of Earth and Environmental Science, Sejong University)
  • 박신영 (세종대학교 지구환경과학과) ;
  • 김기현 (세종대학교 지구환경과학과) ;
  • 양혜순 (삼성전자주식회사 생활가전 사업부) ;
  • 하주영 (삼성전자주식회사 생활가전 사업부) ;
  • 이기한 (세종대학교 지구환경과학과) ;
  • 안지원 (세종대학교 지구환경과학과)
  • Received : 2008.01.23
  • Accepted : 2008.04.02
  • Published : 2008.04.25

Abstract

The application of solid phase microextraction (SPME) is generally conducted by directly immersing the fiber into the liquid sample or by exposing the fiber in the head space (HS). The extraction temperature, the time of incubation, and application of stirring are often designated to be the most important parameters for achieving the best extraction efficiencies of HS-SPME analysis. In this study, relative importance of these three analytical parameters involved in the HS-SPME method is evaluated using a polydimethylsiloxane/carboxen (PDMS/CAR) fiber. To optimize its operation conditions the competing relationships between different parameters were investigated by comparing the extraction efficiency based on the combination of three parameters and two contracting conditions: (1) heating the sample at 30 vs. 50 C, (2) exposing samples at two durations of 10 vs. 30 min, and (3) application of stirring vs. no stirring. According to our analysis among 8 combination types of HS-SPME method, an extraction condition termed as S50-30 condition ((1) 1200 rpm stirring, (2) $50^{\circ}C$ exposure temp, and (3) 30 min exposure duration) showed maximum recovery rate of 45.5~68.5% relative to an arbitrary reference of direct GC injection. According to this study, the employment of stirring is the most crucial factor to improve extraction efficiency in the application of HS-SPME.

Acknowledgement

Supported by : 삼성전자

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