@article{oai:kumadai.repo.nii.ac.jp:00024888, author = {戸田, 敬 and Toda, Kei and Kitazaki, Minoru and 實政, 勲 and Sanemasa, Isao and 戸田, 敬 and Toda, Kei and 北崎, 実 and 實政, 勲 and Sanemasa, Isao}, issue = {12}, journal = {分析化学}, month = {Dec}, note = {application/pdf, 論文(Article), 電極とガス吸収部をごく小さな部分に一体化したガス検出器を開発した。溶融シリカキャピラリーの外側に金膜を塗布し,更にその外側を絶縁のためシリコーン樹脂でコーティングを行う。この後キャピラリーを裁断すると断面にマイクロリング電極が現れる。キャピラリー先端に微小な液滴を形成し,ここにガスを吸収する。この液滴に接しているマイクロリング電極で,吸収した成分をその場で酸化還元して測定する。今回はSO2を対象にして検出特性を評価した。液滴の大きさはサブマイクロリットルから数マイクロリットルと,これまでのガス吸収部として使用されたものと比較しても非常に小さいものであった。気液平衡も微小部分で瞬時に達成するので極めて短い吸収時間でも測定が可能であった。また,吸収液は絶えず新鮮なものが供給され,電極も簡単に新しい面を出せるので,フィールドでの分析に適している。, A small gas detector was developed, in which an electrode and a gas absorber were combined in a small droplet. An Au film was coated on the outside of a fused-silica capillary, and silicone was covered over the Au film for the purpose of insulation. The capillary was cut, and then a micro-ring electrode appeared on its tip. A small droplet was formed at the tip of the capillary and gas was absorbed into the droplet. The absorbed component was measured by the micro-ring electrode that was in contact with the droplet solution. In this work, the detection characteristics of the droplet micro-ring electrode were evaluated using SO2 gas. The droplet size was from sub-micro litters to a few micro-litters, and was much smaller than the droplets used as the gas absorber before. Since the gas-liquid equilibrium was quickly reacted, the measurement could be performed within a short absorbing time. A new absorbing solution was supplied at every measurement, and the electrode could be easily renewed. This system was expected to be suitable for field measurements., http://www.jstage.jst.go.jp/article/bunsekikagaku/49/12/49_989/_article/-char/ja}, pages = {989--995}, title = {液滴マイクロリング電極による電気化学的ガス計測方法の検討}, volume = {49}, year = {2000}, yomi = {トダ, ケイ and サネマサ, イサオ and トダ, ケイ and サネマサ, イサオ} }