Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Analysis of Volatile Organic Compounds in Sediments Using HS-GC/MS - Confirmation of Matrix Effects in External and Internal Standard Methods -

HS-GC/MS를 이용한 퇴적물 중 휘발성유기화합물 분석 - 외부 및 내부표준방법에서 매질영향 확인 -

  • Shin, Myoung-Chul (Han-river Environmental Research Center, National Institute of Environmental Research) ;
  • Jung, Da-som (Han-river Environmental Research Center, National Institute of Environmental Research) ;
  • Noh, Hye-ran (Han-river Environmental Research Center, National Institute of Environmental Research) ;
  • Yu, Soon-ju (Han-river Environmental Research Center, National Institute of Environmental Research) ;
  • Seo, Yong-Chan (Department of Environmental Engineering, Sangji University) ;
  • Lee, Bo-Mi (Han-river Environmental Research Center, National Institute of Environmental Research)
  • 신명철 (국립환경과학원 한강물환경연구소) ;
  • 정다솜 (국립환경과학원 한강물환경연구소) ;
  • 노혜란 (국립환경과학원 한강물환경연구소) ;
  • 유순주 (국립환경과학원 한강물환경연구소) ;
  • 서용찬 (상지대학교 환경공학과) ;
  • 이보미 (국립환경과학원 한강물환경연구소)
  • Received : 2021.11.08
  • Accepted : 2021.11.30
  • Published : 2021.11.30
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Abstract

Volatile Organic Compounds (VOCs) in sediments, which can cause human health problems, have been monitored in Korea since 2014. Measured VOC concentrations can be affected by matrix type and the volatility of target substances. In this study, (1) VOCs volatility and the influence of matrix interference were confirmed, and (2) internal standards (IS) method was applied to improve analytical method. For these purposes, method detection limit (MDL), calibration linearity, precision and accuracy of VOCs were compared in various matrices using the IS. Some of VOCs in sediments showed different peak areas and reduced rates compared to water matrix. It was suggested that adsorption properties of sediments hindered the migration to vapor during heat pretreatment in headspace method. A calibration curve was created in clean sand. Recovery rates for the calibration curve method and IS applying method were 64.1~83.1% and 99.1~119.3%, respectively. Relative standard deviations ranged from 11.1% to 21.6% for the calibration curve method and those for IS ranged 4.7% to 13.7%. In case of real sediment, calibration curve and 1,2-Dichlorobenzene-d4 (ODCB) among IS were not suitable. The average recovery rate of Fluorobenzene (FBZ) increased by 56.4% and Relative Standard Deviation (RSD) by 4.7%. However, the recovery rate was increased in the samples with large values of igniting intensity. This study confirmed that influence of the matrix of VOCs in sediment, and addition of IS materials improved precision and accuracy. Although IS corrects volatilization and adsorption, it is recommended that more than two types of IS should be added rather than single.

Keywords

Acknowledgement

본 논문은 환경부의 재원으로 국립환경과학원의 지원을 받아 수행하였습니다(NIER-2021-03-03-004).

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