Collection efficiencies of PTFE-coated glass fiber filters used for NWPS-254 personal dust sampler

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  • YAMADA Maromu
    Work Environment Research Group, National Institute of Occupational Safety and Health, Japan.
  • TAKAYA Mitsutoshi
    Work Environment Research Group, National Institute of Occupational Safety and Health, Japan.

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  • 個人サンプラーNWPS-254に用いるフッ素樹脂処理ガラス繊維フィルターの粒子捕集効率
  • コジン サンプラー NWPS-254 ニ モチイル フッソ ジュシ ショリ ガラス センイ フィルター ノ リュウシホシュウ コウリツ

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Abstract

<p>We evaluated the particle collection efficiencies of four types of polytetrafluoroethylene (PTFE)-coated glass fiber filters. The efficiencies were tested with 10 sizes of monodispersed aerosols from 30 to 500 nm. The efficiencies</p><p>corresponding to each particle size were obtained by measuring particle number concentrations upward and downward of the filter set in the NWPS-254 sampler. The results showed that each filter satisfied the efficiency of more than</p><p>95% for particle size of 300 nm under the Working Environment Measurement Standards of Japan. On the other</p><p>hand, the efficiencies ranged from 87.0% to 99.7% when particle size was approximately 100 nm.</p>

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