| 研究生: |
林怡秀 Lin, I-Hsiu |
|---|---|
| 論文名稱: |
孔洞型金電極於分析之應用探討 Studied on the Analytical Applications of Porous Gold Electrode |
| 指導教授: |
孫亦文
Sun, I-Wen |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 化學系碩士在職專班 Department of Chemistry (on the job class) |
| 論文出版年: | 2006 |
| 畢業學年度: | 94 |
| 語文別: | 中文 |
| 論文頁數: | 89 |
| 中文關鍵詞: | 催化 、自組裝層 、銅 、硒 、麩胱甘太 、半胱氨酸 、金電極 |
| 外文關鍵詞: | copper ion, Selenium, glutathione, L-cysteine, SAMs, gold electrode, catalysis |
| 相關次數: | 點閱:109 下載:1 |
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本論文是利用奈米孔洞的金電極來進行電化學分析,內容共分三個部分:第一部份是利用奈米孔洞的金電極配合上方波伏安法(Osteryoung Square Wave Voltammetry,OSWV),在水溶液中偵測L-半胱氨酸(L-cysteine)和麩胱甘太(glutathione,GSH)。在L-半胱氨酸偵測,可得到的檢量線線性範圍為15-160 μM,偵測極限0.1 μM(3σ)。麩胱甘太偵測部分,可得到的檢量線的線性範圍為2-25 μM,偵測極限< 2 μM。
第二部分是利用麩胱甘太以自組裝方式(Self-assembled monolayers, SAMs)修飾在奈米孔洞的金電極(GSH/nanoporous-Au electrode)表面上,並將此電極用來用來偵測水溶液中的二價銅離子Cu(II)。所得到檢量線的線性範圍為0.79-315 nM,偵測極限< 0.79 nM。
第三個部分同樣是利用奈米孔洞的金電極,配合非均相電子轉移伴隨均相化學反應的催化反應(EC catalytic reaction),進行水溶液中硒離子Se(IV)的偵測。將奈米孔洞金電極置於含有硒離子和NaBrO3的溶液,以循環伏安法進行偵測。若配合定電位法進行Se(IV)偵測,可得線性範圍為20-2000 ppb,偵測極限為2.4 ppb(3σ)。
There are three parts in this study : the first part is using nanoporous-Au electrodes and Osteryoung square wave voltammetry to determinate L-cysteine and glutathione in aqueous solution, individually. In the case of L-cysteine, if preconcentration time is 10 mins,the linear dynamic range is 15-160 μM, and the detection limit is 0.1 μM(3). For the determination of glutathione, with a preconcentration time is 5 mins, and the linear dynamic range is 0.5-25 μM, and the detection limit of < 0.5μM.
The second part of this study, use the GSH/nenoporous-Au electrode to determinate the copper ion in aqueous solution. If preconcentration time is 5 mins, the linear dynamic range is 0.79-315 nM, and the detection limit is < 0.79 nM.
In the third part, a nanoporous-Au electrode and electrochemical catalytic reaction were employed for the determination of Se(IV) in aqueous solution. Good sensitivity was achieved through the catalytic process between selenium and bromate. Follow potentiostat, linear calibration graph was obtained over the range 20-2000 ppb of Se(IV), with a detection limit (3 x blank signal) of 2.4 ppb.
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