The Study on Analysis Method and Performance Evaluation of Portable GC/MS

휴대용 GC/MS 성능검사 및 분석방법 연구

  • Park, Yuonshin (Center for Chemical Safety Management, National Institute of Environmental Research) ;
  • Noh, Hyeran (Center for Chemical Safety Management, National Institute of Environmental Research) ;
  • Yang, Heeseon (Center for Chemical Safety Management, National Institute of Environmental Research) ;
  • Seok, Gwanseol (Center for Chemical Safety Management, National Institute of Environmental Research)
  • Published : 2013.09.30

Abstract

Recieved Mar. 06, 2013 Revised Mar. 29, 2013 Accepted Sep. 11, 2013In this study, we evaluated the method performance and the optimum sample injection method of the portable GC/MS(HAPSITE) which were designed to operate on scene of chemical accidents. Chemicals used for performance test were vinyl chloride(VC), methyl chloride(MC), benzene(Bz), toluene(Tol). CRM(Certified Reference Material) Manufactured by KRISS(Korea Research Institute of Standards and Science) was used as the standard gas. The results showed that 1) Among three sample injection methods(Cylinder, Silico canister, and Bag), bag was identified as the most appropriate sample injection method. Bag material and capacity did not significantly affect the results. The most ideal reproducibility occurred at the 2-minute point of the purge time in the loop and tenax methods. 2) Performance evaluation of HAPSITE was conducted. Evaluation items were reproducibility, linearity, method detection limit, etc. Tenax concentration method was appropriate for larger molecules and Carbopack concentration method was suitable for smaller molecules.

화학사고 현장에서 운용하도록 개발된 휴대용 GC/MS의 적정 시료 주입방식 연구 및 장비의 분석방식별 성능평가를 실시하였다. 사고대비물질 69종 중 4종(methyl chloride, vinyl chloride, benzene, toluene)의 대상물질을 선정하였고, 성능평가용 표준시료는 한국표준과학원에서 제조한 인증표준물질(CRM)을 사용하였다. 연구 결과, 1) 3가지(실린더, 백, 캐니스터)의 시료주입방식 중 백(bag) 주입방법이 가장 적합한 주입방법으로 판단되었다. 백(bag)의 재질이나 용량은 결과에 큰 영향을 미치지는 않았다. 도입 시료의 적절한 purge time은 Loop method와 Tenax method 모두 2분에서 가장 좋은 재현성을 보였다. 2) 휴대용 GC/MS에서 채택하고 있는 3가지 분석방식(sample loop, tenax concentration, carbopack concentration method)에 대한 대상물질의 재현성, 검출한계, 직선성 등의 성능평가 실시 결과 benzene, toluene과 같이 비교적 분자량이 큰 화합물은 Tenax 흡착관에, methyl chloride, vinyl chloride와 같이 분자량이 작고 휘발성이 큰 화합물은 carbopack 흡착관에 농축 분석하는 것이 더욱 재현성 있는 결과를 얻을 수 있었다.

Keywords

References

  1. Inficon Inc. (2006). HAPSITE Smart Chemical Identification System Operating Manual, pp.1-1-1-10.
  2. Inficon Inc. (2004). Cal/EPA, Evaluation Report for Portable GC/MS(HAPSITE), pp.1-3, 39.
  3. Ministry of Environment. (2007). Standard Methods for Examination of Air, pp.941-942.
  4. SIGMA-ALDRICH Homepage. Adsoprbent Selection guide(http://www.sigmaaldrich.com)
  5. USEPA. (2004). Region 9 Laboratory Volatile Organic Compound Analysis of Air & Soil Vapor by Hapsite Field Portable GC/MS SOP 910, pp.3-4.
  6. USEPA/625/R-96/010b. (1999). Method TO-15, "Determination of VOCs In Air Collected in Specially- Prepared Canisters And Analyzed By GC/MS".
  7. USEPA/625/R-96/010b. (1999). Method TO-17, "Determination of VOCs in Ambient Air Using Active Sampling Onto Sorbent Tubes".