Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/16439
標題: 可拋棄式環盤電極在電分析化學之多樣應用性
The Application of Disposable Ring-Disc Screen Printed Electrodes in the Electrochemical Analysis
作者: 古弘煇
Ku, Hung-Hui
關鍵字: RD-SPE;網版印刷環盤電極;Iodometry;As (III);碘量法;砷
出版社: 化學系所
引用: 曾志明,鐘協訓,科儀新知第廿二卷三期,2000,2 Wang, Joseph; Tian, Baomin; Sahlin, Eskil. Anal. Chem. 1999, 71, 23, 5436. Zen, J.-M.; Chung. H.-H.; Kumar, A. S. Anal. Chem. 2002, 74, 5, 1202. Wang, Joseph; Tian. Baomin; Sahlin. Eskil. PCT Int. Appl. 2001, 77 pp. 戴秀雯,國立中興大學化學系碩士論文,2005。 Zen, J.-M.; Tsai. D.-M.; Kumar, A. S. Electroanalysis. 2003, 15, 14, 1171. 鍾協訓,國立中興大學化學系博士論文,2002。 張家禎,國立中興大學化學系碩士論文,2004。 http://ghs.e-environment.com.tw/MSDS.asp?SN=11# 工業技術研究院,物質安全資料表。 http://w3.epa.gov.tw/epalaw/index.aspx 行政院環境保護署,飲用水水源水質標準。 Douglas G. Williams; Dennis C. Johnson. Anal. Chem. 1992, 64, 17, 1785. Hong Li; Ronald B. Smart. Anal. Chem. Acta. 1996, 325, 25. P. Grundler; G.-U. Flechsig. Electrochim Acta. 1998, 43, 23, 3451. Zen, J.-M.; Chen. P.-Y.; Kumar, A. S. Anal. Chem. 2003, 75, 21, 6017. Abdollah Salimi; Michael E. H.; Craig E. B.; Richard G. C. Analyst. 2004, 129, 9. Xuan Dai; Olga Nekrassova; Michael E. Hyde; Richard G. C. Anal. Chem. 2004, 76, 5924. Andrew O. S.; Craig E. B.; Richard G. C. Electroanalysis. 2005, 17, 4, 335. Andrew O. S.; Craig E. B.; Richard G. C. Electroanalysis. 2005, 17, 19, 1727. Xuan Dai; Richard G. C. Analyst. 2006, 131, 516. D. A. Skoog; D. M. West; F. J. Holler. Anal. Chem. 1997, 362. http://wordpedia.pidc.org.tw/Content.asp?ID=45687 百科知識網,趙藻藩,中國大百科《化學卷》。 L. J.Csa’nyi; K. Ja’ky. Microchem. J. 1997, 57, 65. R. N. Adams. Electrochemistry at Solid Electrodes. New York, copying 1978 Marcel, 80. J. Malyszko; E. Malyszko; E. R-Ferchichi; M. Kaczor. Anal. Chem. Acta. 1998, 376, 357. N. D. Popovic; K. C. Johnson. Anal. Chem. 1998, 70, 468. S. Joiret; M. K.; X. P. N
摘要: 
第一部分的實驗中,將網版印刷環盤電極(RD-SPE)結合碘量法(Iodometry),利用流動注入分析系統(FIA),於pH 4之醋酸緩衝溶液中,偵測水中毒性物質-砷的含量。由於三價砷離子(As3+)在碳電極之偵測環境下並無氧化還原之效果發生,因此利用其與碘分子(Iodine, I2)間之快速反應性,進行定量之工作。實驗分別在Disc電極與Ring電極上施加0.7 V以及0.0 V(vs. Ag/AgCl)之電位,在1 mM KI之流動相背景下,偵測線性範圍為10 − 50 μM,理論偵測極限為0.35 μM (S/N=3),並得到相當好的迴歸係數為0.999,線性方程式為y = 0.014x +0.007,另外也嘗試減少KI 濃度以降低偵測極限,也都有相當好的分析結果。
於第二部份則承襲第一部份之實驗架構,將分析對象由三價砷離
子(As3+)換作2-硫代巴比妥酸(2-Thiobarbituric acid, TBA)。利用TBA 與脂質過氧化之後所得之終產物丙二醛(Malondialdehyde, MDA)進行錯合反應後,依照TBA 所造成之抑制電流訊號反推MDA 之含量,期望藉此開發脂質抗氧化能力測定之新技術。
而在最後則是冀望在以低樣品使用量偵測為最終目標之前提下,
開發快速偵測之平台。因此採取了高分子修飾電極結合第一部份實驗之核心-三價砷離子(As3+)以及碘分子(I2)間之作用,成功的開發出PVP/I2 修飾電極。利用微分脈衝伏安法(DPV)對於三價砷離子(As3+)與電極表面存在之反應進行分析定量工作,階梯電位為20 mV,振幅為20 mV,脈衝寬度為10 msec,脈衝週期為100 msec。線性範圍在2.5 μM− 20 μM,求得其偵測極限為0.055 μM (S/N=3),迴歸係數為0.998,線性方程式為y = 0.087 x + 0.529。

We report here the application of a disposable screen-printed ring-disc electrode (SPRDE) for sensitive determination of As (III) and Malondialdehyde (MDA). The electrogenerated iodine at the disc electrode of the SPRDE can oxidize arsenite and hence the inhibited collect current at the ring electrode can be used for determination of As (III) and MDA by flow injection analysis (FIA). Under the optimal conditions of As (III) determination, the SPRDE shows a linear calibration range of 10-50 μM with current sensitivity and regression coefficient of 0.017 μA/μM and 0.999, respectively. The detection limit (S/N = 3) was determined to be 0.35 μM. The SPRDE shows tolerable interference effect to PO42-, Cl-,NO3-, and SO42- for even up to 100 times excess in concentration with respect to 10 μM arsenite.
The concept of single drop analysis based on the reaction betweenarsenite and iodine was developed. We modified screen-printed electrode by poly (4-vinyl pyridine) (PVP). The screen-printed electrode shows a linear calibration range of 20-2.5 μM with current sensitivity and regression coefficient of 0.087 μA/μM and 0.998, respectively.
URI: http://hdl.handle.net/11455/16439
其他識別: U0005-0908200614070700
Appears in Collections:化學系所

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