WEKO3
アイテム
テンサンメトリー波高の界面活性剤濃度依存性
http://hdl.handle.net/10252/4777
http://hdl.handle.net/10252/477712b2ad43-b8bc-480f-a2d5-9961f3435bb6
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
分析化学22(4)_411-414.pdf (222.0 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2012-03-06 | |||||
| タイトル | ||||||
| タイトル | テンサンメトリー波高の界面活性剤濃度依存性 | |||||
| タイトル | ||||||
| タイトル | Dependence of the tensammetric peak height on the concentration of surface-active substances. | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
神原, 富民
× 神原, 富民× 片岡, 正光× 斎藤, 紘一 |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 9015 | |||||
| 姓名 | Kambara, Tomihito | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 9016 | |||||
| 姓名 | Kataoka, Masamitsu | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 9017 | |||||
| 姓名 | Saitoh, Koichi | |||||
| 書誌情報 |
分析化学 巻 22, 号 4, p. 411-414, 発行日 1973 |
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| 出版者 | ||||||
| 出版者 | 日本分析化学会 | |||||
| ISSN / EISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0525-1931 | |||||
| 書誌ID（NCID） | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00222633 | |||||
| テキストバージョン | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| 日本十進分類法 | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 433 | |||||
| NIIサブジェクト | ||||||
| 主題Scheme | Other | |||||
| 主題 | 化学 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 交流ポーラログラフ法において,多くの界面活性剤は,その吸着-脱着過程により,テンサンメトリー波と呼ばれるピークを示す.Breyerらは,テンサンメトリー波高がLangmuir吸着等温式に従うことを主張した.吸着モル数がテンサンメトリー波高<I>i<SUB>p</SUB></I>に比例すると仮定すると,1 /<I>i<SUB>p</SUB></I>と1/<I>C</I>との間には直線関係がなりたつことになる.著者らは,9種の界面活性剤を使用して,1/<I>i<SUB>p< /SUB></I>と1/<I>C</I>の直線関係を実験的に証明した.また1 /<I>i<SUB>p</SUB>vs</I>.1/<I>C</I>プロットは,千田が報告した<I>i<SUB>p</SUB>vs< /I>.log<I>C</I>プロットよりよい直線性を示した.しかしながら,1 /<I>i<SUB>p</SUB>vs</I>.1/<I>C</I>プロットにおいて,回帰直線が縦軸と負の値で交わることもある.この論理的矛盾が,未解決のまま残されている. In AC polarography many surface-active substances show nonfaradaic waves, which are caused by the adsorption-desorption process of the surfactant at the electrode surface. Breyer school has given the name of tensammetric peak to this type of wave and pointed out that the tensammetric peak height obeys the Langmuir adsorption isotherm, shown by eqn.(1), where<BR><I>a</I>=amount of adsorbed substance per unit area of electrode surface, <BR><I>Z</I>=the maximum number of adsorption sites per unit area, <BR>ω=adsorption coefficient, <BR><I>C</I>=concentration of surfactant in the bulk of solution.<BR>If the tensammetric peak height <I>i<SUB>p</SUB></I> is proportional to the amount of adsorbed substance <I>a</I>, as Breyer states, then the reciprocal of peak height plotted against the reciprocal of concentration should give a straight line, as eqn. (2) shows.<BR>On the other hand, upon investigating the concentration dependence of the tensammetric peak potential, Senda and Tachi report that <I>i<SUB>p</SUB></I> plotted against log <I>C</I> shows a roughly linear relationship.<BR>Employing the nine species of surface-active substance, as tabulated in Table I, the concentration dependence of the tensammetric peak height is measured. The concentration range is so chosen that the peak height dose not exceed 500 MΩ<SUP>-1</SUP>; otherwise the effect of circuit resistance is not negligible. In general, a surfactant shows two peaks, namely, the peak at a potential more positive than the electrocapillary maximum potential <I>i<SUB>p</SUB></I><SUP>+</SUP> and the peak at a more negative potential <I>i<SUB>p</SUB></I><SUP>-</SUP>. In the present investigation, the peak height of <I>i<SUB>p</SUB></I><SUP>+</SUP> is measured with exception of benzyl alcohol with which both <I>i<SUB>p</SUB></I><SUP>+</SUP> and <I>i<SUB>p</SUB></I><SUP>-</SUP> are measured.<BR>The method of linear regression is applied to the 1/<I>i<SUB>p</SUB></I> <I>vs</I>. 1/<I>C</I> and the <I>i<SUB>p</SUB></I> <I>vs</I>. log <I>C</I> plots, and the corresponding two correlation coefficients <I>r</I><SUB>1</SUB> and <I>r</I><SUB>2</SUB> are evaluated. The difference between <I>r</I><SUB>1</SUB> and <I>r</I><SUB>2</SUB> is tested according to the method given in the review of Doerffel by means of eqn. (3). As shown in Figs. 2, 3, 4 and 5, and also in Table I, the linear relationship between 1/<I>i<SUB>p</SUB></I> and 1/<I>C</I> holds, in general, much better than that between <I>i<SUB>p</SUB></I> and log <I>C</I> does.<BR>In the plot of 1/<I>i<SUB>p</SUB></I> <I>vs</I>. 1/<I>C</I>, however, with several surface-active substances, the straight line crosses the ordinate at a negative value of 1/<I>i<SUB>p</SUB></I>, as illustrated in Figs. 2 and 4. If 1/<I>C</I> tends to zero, 1/<I>i<SUB>p</SUB></I> should show a positive value on the basis of Langmuir adsorption isotherm. This contradiction remains theoretically unsolved. |
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