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Isocratic 조건하에서 HPLC를 이용한 산업시설 배출가스 중 포름 알데하이드 분석

An Analytical Method of Formaldehyde in Exhaust Gases from Industrial Facilities using a HPLC under Isocratic Conditions

  • 김준표 (전남대학교 환경에너지공학과) ;
  • 박승식 (전남대학교 환경에너지공학과) ;
  • 배민석 (국립목포대학교 환경공학과)
  • Kim, Jun-Pyo (Department of Environment and Energy Engineering, Chonnam National University) ;
  • Park, Seung-Shik (Department of Environment and Energy Engineering, Chonnam National University) ;
  • Bae, Min-Suk (Department of Environmental Engineering, Mokpo National University)
  • 투고 : 2018.08.03
  • 심사 : 2018.08.21
  • 발행 : 2018.08.31

초록

In this study, a previous DNPH (2,4-dinitrophenylhydrazine) coupled with high performance liquid chromatography (HPLC) method to measure the concentration of formaldehyde in ambient and source environments has been improved. To improve the disadvantage of the previous HPLC method, an appropriate composition ratio of mobile phase (water: acetonitrile (ACN)) was determined and an isocratic analysis was conducted. Furthermore, limit of detection (LOD), limit of quantitation(LOQ), accuracy, and precision were investigated to verify the reliability of the analytical conditions determined. Finally, samples of exhaust gases from five different industrial facilities were applied to HPLC analytial method proposed to determine their formaldehyde concentrations. The appropriate composition ratio of the mobile phase under the isocratic condition was a mixture of water(40%) and ACN(60%). As the volume fraction of the organic solvent ACN increases, retention time of the formaldehyde peak was reduced. Detection time of formaldehyde peak determined using the proposed isocratic method was reduced from 7 minutes(previous HPLC method) to approximately 3 minutes. LOD, LOQ, accuracy, and precision of the formaldehyde determined using standard solutions were 0.787 ppm, 2.507 ppm, 93.1%, and 0.33%, respectively, all of which are within their recommended ranges. Average concentrations of the formaldehyde in five exhaust gases ranged from 0.054 ppm to 1.159 ppm. The lowest concentration (0.054 ppm) was found at samples from waste gas incinerator in a bisphenol-A manufacturing plant. The highest was observed at samples from the absorption process in manufacturing facilities of chemicals including formaldehyde and hexamine. The analytical time of the formaldehyde in ambient air can be shortened by using the isocratic analytical method under appropriate mobile phase conditions.

키워드

참고문헌

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