比色センサを用いたヒト皮膚より放散されるNO<sub>2</sub>測定法の検討

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タイトル別名
  • <b>Use of Colorimetric Sensing Element for Measuring of Nitrogen Dioxide Emission from Human Skin </b>
  • 比色センサを用いたヒト皮膚より放散されるNO₂測定法の検討
  • ヒショク センサ オ モチイタ ヒト ヒフ ヨリ ホウサン サレル NO ₂ ソクテイホウ ノ ケントウ

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<p>We had previously developed a colorimetric sensing element for measuring atmospheric nitrogen dioxide (NO2) concentration. The sensor element has an absorption peak at 525 nm, and exposed NO2 concentration is calculated from absorbance change and exposure time. We used the sensor element as a passive sampler for measuring of NO2 emission from human skin and evaluated a performance of the passive sampler. First of all, in order to attach the passive sampler on human skin, a structure that was made of PTFE membrane filter's bag and adhesive plaster (Band-Aid) was invented. Interference gas that was released from the invented structure was under detection limit. Next, we experimentally determined the conversion formula that convert an absorbance change of the sensor element into an azo dye's amount. After that, we measured NO2 emission from human skin using a combination of the passive sampler and the structure. We picked up 7 measurement points (neck, underarm side, arm, waist, inner thigh, calf and ankle) and measured NO2 emission from a human skin of a man in a schoolroom with low atmospheric NO2 concentration during 8 hours. The obtained values were 2.6±2.3 ng/(cm2･h), 1.5±1.9 ng/(cm2･h) and 0.9±0.6 ng/(cm2･h) for underarm side, neck and ankle, respectively. We have successfully measured NO2 emission distribution of a human body using developed passive sampler and invented structure.</p>

収録刊行物

  • 環境化学

    環境化学 26 (3), 123-129, 2016

    一般社団法人 日本環境化学会

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