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정도관리용 포름알데히드 시료개발 및 분석능력평가

Sample Development for Quality Control of Formaldehyde and Proficiency Analytical Testing

한국산업보건학회지 2020년 30권 1호 p.58 ~ 66
박해동, 장미연, 박승현,
소속 상세정보
박해동 ( Park Hae-Dong ) - Korea Occupational Safety and Health Agency Occupational Safety and Health Research Institute
장미연 ( Jang Mi-Yeon ) - Korea Occupational Safety and Health Agency Occupational Safety and Health Research Institute
박승현 ( Park Seung-Hyun ) - Korea Occupational Safety and Health Agency Occupational Safety and Health Research Institute

Abstract


Objective: 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 μg/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.

키워드

formaldehyde; proficiency analytical testing; quality control

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