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研究生: 張喦升
論文名稱: 紫外光發光二極體誘導螢光偵測法結合毛細管電泳/線上濃縮技術之開發與應用
指導教授: 林震煌
學位類別: 碩士
Master
系所名稱: 化學系
Department of Chemistry
論文出版年: 2005
畢業學年度: 93
語文別: 中文
論文頁數: 122
中文關鍵詞: 毛細管電泳發光二極體
論文種類: 學術論文
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  • 本篇實驗應用紫外光發光二極體(UV-LED)誘導螢光搭配毛細管電泳層析技術,並結合線上濃縮技術對於螢光性(核黃素)及非螢光性(色氨酸)進行偵測。本實驗所使用的UV-LED發光波長在380 nm,功率約在2 mW。在偵測核黃素的部分使用速度變化誘導聚焦(Velocity-Difference Induced Focusing, V-DIF)來進行實驗,成功將偵測極限由原來僅使用微胞電動電泳層析的200ppb提高到3~7ppb。在色氨酸的偵測部分,則利用螢光試劑衍生色氨酸,使其適合UV-LED的激發,並利用掃集技術(sweeping)將偵測極限從原來使用微胞電動電泳層析的1.5ppm提高至3ppb。在真實樣品的應用上分別偵測啤酒裡面的核黃素,以及尿液、牛奶裡面的色氨酸均可以成功快速達到定性及定量的結果。

    Abstract
    The application of an ultraviolet (UV) light emitting diode (LED) to on-line sample concentration/fluorescence detection in capillary electrophoresis (CE) is described. The utility of UV-LED (peak emission wavelength at 380 nm, ~ 2 mW) for fluorescence detection is demonstrated by examining a naturally fluorescent (riboflavin) and a non-fluorescent compound (tryptophan), respectively. The detection limit for riboflavin was determined to be 0.2 ppm by the normal MEKC mode and this was improved to 3 ~ 7 ppb when a dynamic pH-junction techniques were applied. On the other hand, the detection limit of the tryptophan derivative was determined to be 1.5 ppm using the MEKC mode and this was improved to 3 ppb when the sweeping-MEKC mode was applied. In an analysis of an actual sample, the concentrations of riboflavin and tryptophan in beer and urine/milk samples were determined, respectively.

    中文摘要 Ⅰ 英文摘要 Ⅱ 目錄 Ⅲ 圖目錄 Ⅴ 表目錄 VII 第一章、緒論 1 1-1 發光二極體簡介 1 1-2 分析物簡介 4 1-2-1 核黃素 4 1-2-2 色氨酸 5 1-3 研究目的 6 第二章、分析方法與原理 9 2-1 毛細管電泳層析法之發展歷程 9 2-2 毛細管電泳法之基本原理 13 2-2-1 電泳分離與電泳遷移率 13 2-2-2 電滲流(EOF) 14 2-2-3 管柱分離效率 18 2-3 毛細管電泳層析法之分離模式 19 2-3-1 毛細管區帶電泳(CZE) 20 2-3-2 微胞電動層析法(MEKC) 24 2-4 毛細管線上濃縮技術 28 2-4-1 毛細管電泳線上掃集法(sweeping) 31 2-4-2 毛細管電泳線上堆積法(stacking-MEKC) 33 2-4-3 陽離子選擇完全注射法(CSEI) 35 2-4-4 速度變化誘導聚焦法(V-DIF) 37 2-4-5動相pH界面掃集法 (dynamic pH junction-sweeping) 39 第三章、儀器及藥品 41 3-1 自組式毛細管電泳/紫外光LED誘導螢光分析儀 41 3-2 自組式螢光光譜儀 44 3-3 儀器及週邊設備列表 46 3-4 使用藥品列表 49 3-5 色氨酸衍生物製備 51 第四章、結果與討論 52 Part I 核黃素的毛細管電泳/LIF偵測 4-1 核黃素光譜性質之測量 53 4-2 UV-LED發光光譜之測量 55 4-3 微胞電動層析法(MEKC)之電泳條件測試 56 4-3-1 最佳化電泳測試 56 4-3-2 MEKC檢量線製作 60 4-4 線上濃縮技術應用一:stacking-MEKC 63 4-4-1 stacking-MEKC最佳樣品堆積條件之確立 63 4-4-2 stacking-MEKC檢量線製作 67 4-5 線上濃縮技術應用二:Velocity-Difference Induced Focusing (V-DIF) by using a dynamic pH junction 70 4-5-1 速度變化誘導聚焦法電泳最佳化 70 4-5-2 速度變化誘導聚焦法檢量線製作 81 4-6 真實樣品的應用:啤酒內核黃素的偵測 83 4-6-1 stacking-MEKC和V-DIF濃縮技術比較 83 4-6-2 V-DIF應用於啤酒裡面的核黃素偵測 85 Part II 色氨酸的毛細管電泳/LIF偵測 4-7 色氨酸衍生物(β-HBC)的基本性質測量 87 4-7-1 β-HBC質譜建立 87 4-3-2 β-HBC螢光激發光譜建立 90 4-8 β-HBC之MEKC和掃集法(sweeping)最佳條件測試 92 4-8-1 掃集法(sweeping)的最佳條件測試 92 4-8-2 掃集法的檢量線製作 100 4-8-3 MEKC的檢量線製作 102 4-9 真實樣品的應用:尿液以及牛奶裡的色氨酸偵測 106 4-9-1 尿液裡的色氨酸偵測 106 4-9-2牛奶裡的色氨酸偵測 111 第五章、結論 114 參考文獻 116 發表論文 122

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