エアロゾル研究
Online ISSN : 1881-543X
Print ISSN : 0912-2834
ISSN-L : 0912-2834
19 巻 , 4 号
Winter
選択された号の論文の9件中1~9を表示しています
特集「大気エアロゾルの乾性沈着」
技術論文
  • 吉山 秀典
    2004 年 19 巻 4 号 p. 274-280
    発行日: 2004/12/20
    公開日: 2007/04/18
    ジャーナル フリー
    The polytetrafluoroethylene (PTFE) filter has been recommended for the measurement of mass concentration of ambient fine particles smaller than 2.5 μm (PM2.5) . Since the PTFE filter tends to be negatively charged, the electrical charge would introduce serious error in the evaluation of PM2.5 concentration with electric microbalances. The present work investigated the influence of filter charge on the determination of filter mass as well as a method which minimizes the error due to the electrical charge, using the PTFE filter of 140 mg weight with a support ring.
    It was found that that attractive electrostatic force exerting between filter and microbalance greatly influences the measured mass of filter and that the use of neutralizer can reduce the error, effectively. The use of filter measurement kit, which shields the electrical field from the filter, was also effective for reducing the error in the mass measurement of filter.
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