Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Determination of N-nitrosamines in Water by Gas Chromatography Coupled with Electron Impact Ionization Tandem Mass Spectrometry

EI-GC/MS/MS를 이용한 니트로사민류의 수질분석

  • 이기창 (경상북도보건환경연구원) ;
  • 박재형 (경상북도보건환경연구원) ;
  • 이원태 (금오공과대학교 토목환경공학부)
  • Received : 2014.10.29
  • Accepted : 2014.11.19
  • Published : 2014.11.30

Abstract

This study assessed analysis of N-nitrosamines by separation, identification, and quantification using a gas chromatography (GC) mass spectrometer (MS) with electron impact (EI) mode. Samples were pretreated by a automated solid phase extraction (SPE) and a nitrogen concentration technique to detect low concentration ranges. The analysis results by EI-GC/MS (SIM) and EI-GC/MS/MS (MRM) on standard samples with no pretreatment exhibited similar results. On the other hand, the analysis of pretreated samples at low concentrations (i.e. ng/L levels) were not reliable with a EI-GC/MS due to the interferences from impurity peaks. The method detection limits of eight (8) N-nitrosamines by EI-GC/MS/MS analysis ranged from 0.76 to 2.09 ng/L, and the limits of quantification ranged from 2.41 to 6.65 ng/L. The precision and accuracy of the method were evaluated using spiked samples at concentrations of 10, 20 and 100 ng/L. The precision were 1.2~13.6%, and the accuracy were 80.4~121.8%. The $R^2$ of the calibration curves were greater than 0.999. The recovery rates for various environmental samples were evaluated with a surrogate material (NDPA-$d_{14}$) and ranged 86.2~122.3%. Thus, this method can be used to determine low (ng/L) levels of N-nitrosamines in water samples.

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Acknowledgement

Grant : 마이크로그리드 물 재이용 기술 개발, 먹는 물 중의 미량오염물질 제어 및 모니터링 연구

Supported by : 한국건설기술연구원, 중소기업청

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