Journal of Korean Society of Occupational and Environmental Hygiene (한국산업보건학회지)

Korean Industrial Hygiene Association (한국산업보건학회)
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Sample Development for Quality Control of Formaldehyde and Proficiency Analytical Testing

정도관리용 포름알데히드 시료개발 및 분석능력평가

  • Park, Hae Dong (Occupational Safety and Health Research Institute, KOSHA) ;
  • Jang, Miyeon (Occupational Safety and Health Research Institute, KOSHA) ;
  • Park, Seunghyun (Occupational Safety and Health Research Institute, KOSHA)
  • 박해동 (한국산업안전보건공단 산업안전보건연구원) ;
  • 장미연 (한국산업안전보건공단 산업안전보건연구원) ;
  • 박승현 (한국산업안전보건공단 산업안전보건연구원)
  • Received : 2020.03.06
  • Accepted : 2020.03.27
  • Published : 2020.03.31
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Abstract

Objectives: The objective of this study was to develop formaldehyde samples for quality control (QC) and to test the applicability of proficiency analytical testing in Korea. Methods: We made formaldehyde samples with certified standard solutions (formaldehyde in water or acetonitrile) and 2,4-dinitrophenylhydrazine (2,4-DNPH)-coated silicagel tubes. Four levels of formaldehyde concentration were tested for storage stability at room temperature and at 4℃ over three months. Analytical proficiency testing was performed with four or 36 institutes. Results: Formaldehyde sample tubes were easily made through the injection of standard solutions and the average efficiencies of recovery were 95-101%. The coefficients of variation (CV) of the formaldehyde samples were 1.39-2.55%. The recovery efficiencies fell between 90% and 110% at the concentration range of 1-10 ㎍/sample over three months storage at refrigerated and room temperature. The CVs were less than 5% in the proficiency analytical testing. By adjusted proficient ranges, 64% of the results of the second proficiency analytical testing were acceptable. Conclusions: The formaldehyde samples made by injection on 2,4-DNPH-coated silicagel tubes were stable and applicable for quality control.

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