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フロー式溶液導電率法に基づく二酸化硫黄の小型検出器
http://hdl.handle.net/2298/20100
http://hdl.handle.net/2298/20100a1feb39a-237c-4241-bd84-6b0a05021c0f
名前 / ファイル | ライセンス | アクション |
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110002905526.pdf (745.3 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2011-07-07 | |||||
タイトル | ||||||
タイトル | フロー式溶液導電率法に基づく二酸化硫黄の小型検出器 | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
主題 | detector of sulfur dioxide, flow absorbing solution, conductometry | |||||
資源タイプ | ||||||
資源タイプ | journal article | |||||
著者 |
戸田, 敬
× 戸田, 敬× 井上, 博史× 實政, 勲 |
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別言語の著者 |
戸田, 敬
× 戸田, 敬× Inoue, Hiroshi× 實政, 勲 |
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内容記述 | ||||||
内容記述 | 溶液導電率法に基づく小型なSO_2検出器の構築を図った. 本法は従来のバッチ法とは異なり, 連続測定が可能である. 又, 同じ基板の上に流路と導電率測定電極があり, デッドボリュームを極めて小さくしている. ガラスエポキシ基板にフォトリソグラフィーとスパッタリングにより導電率測定用の白金電極を形成した. この上にテフロンシートやガス透過膜を組み合わせて, 溶液の流路やガス吸収部を形成した. 幅2mm, 厚み0.5mmの流路に硫酸-過酸化水素水溶液を圧送で流し, ガス透過膜で隔てた反対側に試料大気を流す. SO_2はガス透過膜を通って吸収液に溶け込み吸収液の導電率が上昇する. ガス吸収部の上流及び下流側に設けられた白金電極により, 導電率の変化を測定して, SO_2濃度を計測する. 感度や応答時間は, 吸収液流量に大きく依存するが, 今回の系での標準的な流量はわずか20μl min^<-1>であり, 長期の測定でも携帯が可能な消費量である. 上記の流量のとき, 10ppb〜1ppmのSO_2が測定可能であり, 1ppm当たりの導電率変化0.971の感度を得た. 同条件での応答時間(T_<90%>)は82秒であった. 妨害ガスの影響も多少見られるが, CO_2に対する感度はSO_2の約1/30000であり, 簡易的な測定には十分である. 本研究は, 今後, 電気的な送液ポンプを内蔵したりしたμTASの構築を行う足がかりにもなった. | |||||
内容記述 | ||||||
内容記述 | A miniaturized detector based on absorbing conductometry was constructed in order to measure the SO_2 concentration in air. This detector is not only small, but is also capable of continuous measurement of SO_2, unlike the conventional detectors for intermittent SO_2 measurements. Two bilateral pairs of Pt electrodes were fabricated on a glass-epoxy substrate through conventional photolithography and sputtering. On this substrate, a cavity for the flow of an absorbing solution was formed with a Teflon sheet and a gas-permeable membrane. The absorbing solution, H_2SO_4-H_2O_2, was made to flow through this cavity of 2 mm in width and 0.5 mm in thickness by applying pressure to a reservoir of the solution. The sample gas was introduced into the other side of the membrane. Gaseous SO_2 permeated through the membrane and dissolved into the absorbing solution, resulting in an increase in the electrical conductivity of the solution. Any change in the conductivity was monitored using Pt electrodes located both up- and downstream of the absorbing zone, and thus the SO_2 concentrations were determined. The sensitivity and response time largely depended on the flow rate of the absorbing solution. Since the standard flow rate employed was 20 μl min^<-1>, the volume of the waste solution, even over long-time operation, was sufficiently small to be carried. When the absorbing solution was flowed at this rate, from 10 ppb to 1 ppm of SO_2 could be measured and the change ratio in the conductivity was 0.971 ppm^<-1>. The response time (T_<90%>) was 82 sec under the same conditions. Other gases interfered slightly; e.g. the sensitivity to CO_2 was about 1/30000 of that of SO_2, so the selectivity of this method was sufficiently good for facile use. This study furnished a step for constructing a miniaturized total chemical analysis system (μTAS) for SO_2 measurements. | |||||
書誌情報 |
分析化学 巻 47, 号 10, p. 727-734, 発行年 1998-10-05 |
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書誌レコードID | ||||||
収録物識別子 | AN00222633 | |||||
権利 | ||||||
権利情報 | 社団法人日本分析化学会 | |||||
情報源(ISSN) | ||||||
関連名称 | 05251931 | |||||
フォーマット | ||||||
内容記述 | application/pdf | |||||
形態 | ||||||
745309 bytes | ||||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
日本十進分類法 | ||||||
主題 | 433 | |||||
その他の言語のタイトル | ||||||
その他のタイトル | Miniaturized detector of sulfur dioxide based on the flow conductometry of an absorbing solution | |||||
タイトル(ヨミ) | ||||||
その他のタイトル | フローシキ ヨウエキ ドウデンリツホウ ニ モトヅク ニサンカ イオウ ノ コガタ ケンシュツキ | |||||
出版者 | ||||||
出版者 | 社団法人日本分析化学会 | |||||
資源タイプ | ||||||
内容記述 | 論文(Article) | |||||
資源タイプ・ローカル | ||||||
雑誌掲載論文 | ||||||
資源タイプ・NII | ||||||
Journal Article | ||||||
資源タイプ・DCMI | ||||||
text | ||||||
資源タイプ・ローカル表示コード | ||||||
01 | ||||||
URL | ||||||
内容記述 | http://ci.nii.ac.jp/naid/110002905526 | |||||
コメント | ||||||
本文データは学協会の許諾に基づきCiNiiから複製したものである |