大気粉じん,溶接ヒューム,膜フィルターなどの吸湿特性とひょう量精度
書誌事項
- タイトル別名
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- Hygroscopic properties of airborne particulates, weld fumes, and membrane filters, and weighing precision
- タイキ フンジン ヨウセツ ヒューム マク フィルター ナド ノ キュウシツ
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Hygroscopic properties of airborne particulates, weld fumes, and membrane filters, conditions for controlling their adsorbed moisture, and precise weighing were studied. A desiccator equipped with a miniature fan for agitating the atmosphere was used to control the adsorbed moisture of the samples. The humidity in the humidistat was adjusted with a sulfuric acid solution, and the temperature was controlled by dipping the lower part of the desiccator in water of a thermostat. The dried or moist materials described attained to equilibrium weights within about 12 h in an atmosphere of 20°C, 50% humidity. The moisture adsorption was similar to the BET type due to multilayer adsorption: The adsorbed moisture on the materials increased abruptly with increasing humidities over 70%, and variation of the moisture was small under lower humidities than 50%. Weld fumes were less hygroscopic than the airborne particulates. Standing these materials during more than 12 h in the atmosphere of (20±1)°C and (50±1)% humidity are recommended for their precise weighing. More than about 100 mg of the sample can be weighed within 1 % of relative precision. The membrane filters tested, and minor sample of the particulates or fume collected on a membrane filter can be weighed within 0.1 mg of precision by use of a counterpoise.
収録刊行物
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- 分析化学
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分析化学 30 (6), T55-T60, 1981
公益社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390282679030185088
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- NII論文ID
- 110002910461
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- NII書誌ID
- AN00222633
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- NDL書誌ID
- 2318732
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- ISSN
- 05251931
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- NDL-Digital
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可