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총휘발성유기화합물 측정 직독식장비 정확도 향상을 위한 현장보정계수 활용 연구

Preliminary Study on Effect of the Field Correlation Factor for Increasing of the Accuracy in a Direct Reading Instruments on Photoionization Detector for Total Volatile Organic Compounds

  • 김성호 (한국산업안전보건공단 산업안전보건연구원) ;
  • 이광용 (한국산업안전보건공단 산업안전보건연구원) ;
  • 김수진 (한국산업안전보건공단 산업안전보건연구원) ;
  • 박해동 (한국산업안전보건공단 산업안전보건연구원)
  • Sungho Kim (Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency) ;
  • Gwangyong Yi (Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency) ;
  • Sujin Kim (Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency) ;
  • Hae Dong Park (Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency)
  • 투고 : 2024.02.13
  • 심사 : 2024.03.27
  • 발행 : 2024.03.31

초록

Objectives: Direct reading instruments (DRIs) are widely used by industrial hygienists and other experts for preliminary survey and identifying source locations in many industrial fields. Photoionization detectors (PIDs), which are a form of hand-held portable DRIs, have been used for a variety of airborne vaporized chemicals, especially evaporated hydrocarbon solvents. The benefits of PIDs are high sensitivity between each chemical, competitive price, and portability. With the goal of increasing the accuracy of logged PID concentrations, previous studies have performed tests for the assessment of single chemical compounds, not mixtures. The purpose of this preliminary study was to measure mixtures with a PID and charcoal tube at the same time and compare the accuracy between them. Methods: A chamber test was implemented with different mixtures of hydrocarbon chemicals (acetone, isopropyl alcohol, toluene, m-xylene) and levels in the range of 14 to 864 ppm. Three PIDs and charcoal tubes were connected to the chamber and measured the chemical mixtures simultaneously. A comparison of accuracy and the PID group of concentrations with manufacture correction factor (M_CF) and field correction factor (F_CF) applied was performed. Results: The accuracy of the PID concentrations data-logged from the PID did not meet the accuracy criteria except for the mixture level B and C logged from PID No. 2, which was 18% of all tests for meeting accuracy criteria. The mean and standard deviation (SD) of concentration (ppm) of the charcoal tube followed by each mixtures' level were 10.37±0.26, 155.33±5.28, 300.80±11.65, and 774.93±22.65, respectively. When applying F_CF into the PID concentrations, the accuracy increased by nearly 82%. However, in the case of M_CF, none met the accuracy criterion. Between the PID there were differences of logged concentrations. Conclusions: In this preliminary study, the concentration of a logged PID with F_CF applied was a better way to increase accuracy compared to applying M_CF. We suggest that additional research is necessary to consider environmental factors such as temperature and humidity.

키워드

참고문헌

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