各種ばいじん量測器による測定値の再現性

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書誌事項

タイトル別名
  • Reproducibility of values of amounts of air dusts obtained by three deposit gages
  • カクシュ バイジンリョウ ソクテイ ニ ヨル ソクテイチ ノ サイゲンセイ
  • Differences of amounts of deposited impurities obtained by the British Standard deposit gage and dust jar. III
  • 降下ばいじんの測器による差異に関する総合的研究(第3報)

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抄録

This study was carried out using the British Standard deposit gage (BG), a wet modification of BG (wet BG), and the dust jar recommended by the Pharmaceutical Society of Japan (DJ), at 4 stations in Tokyo city. The deviation coefficient (d) used by the authors to show the reproducibility was the following, <BR>d=|m-a|/m×100=|m-b|/m×100, <BR>where, a, b, …… measured value of one material, <BR>m=a+b/2<BR>There were stational, monthly and instrumental fluctuations in the deviation coefficient, although d by the same instrument was about 25% in the annual mean and was distinctly smaller than d between different kinds of instrument which was usually over 20%. Among 3 dust collectors tested, BG tended to give the largest d.<BR>As collective conclusions from their 3 successive reports remarkable and irregular differences were seen between BG values and the other two in the amount of deposition (average annual values by the latters were 1.52 times greater than the former) as well as in its composition. The differences were seen in every places, and in every months or years. Meanwhile, the DJ and the wet BG methods gave values in good agreement, and generally with higher reproducibility than the BG method.<BR>DJ is much easier in the practical oper than BG, and by the use of DJ, they can avoid accidental errors caused by meteorological conditions, especially by the wind, which are almost unavoidable in BG. Thus, DJ should be recommended as the dust collector instead of BG. The adoption of the DJ or wet method is essential in the measurement in rainless season in large city with multiple smoke sources.

収録刊行物

  • 分析化学

    分析化学 12 (11), 1053-1057, 1963

    公益社団法人 日本分析化学会

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