| 第 35 卷第 6 期 |  | Vol. 35 No. 6 | | 2005 年 12 月 | Dec 2005 |
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所屬欄目：有機合成原料
基于硫胺素熒光增強的可更新液滴熒光法用于痕量過(guò)氧化氫的測定 |
| 戴春霞(長(cháng)沙理工大學(xué)化環(huán)系; 湖南長(cháng)沙) |
| 摘 要：硫胺素在堿性條件下能被過(guò)氧化氫氧化成具有較強熒光的硫胺熒�；诖嘶驹�,利用連續動(dòng)態(tài)液滴熒光法測定溶液中的痕量過(guò)氧化氫。連續產(chǎn)生與滴落的液滴可充當無(wú)光窗光池。在優(yōu)化的實(shí)驗條件下,傳感器對2.5×10-5 mol/L～1.9×10-4 mol/L濃度范圍內的過(guò)氧化氫具有良好的線(xiàn)性響應,檢測限為4.88×10-6 mol/L。方法靈敏度高,選擇性好,操作簡(jiǎn)單,試劑用量少。將其用于雨水中痕量過(guò)氧化氫的測定,結果滿(mǎn)意。 |
| 關(guān)鍵詞：過(guò)氧化氫; 硫胺素; 熒光增強; 液滴 |
| 中圖分類(lèi)號：TQ247.3 文獻標識碼：A 文章編號：1009-9212(2005)06-0051-03 |
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| Determination of Hydrogen Peroxide Based on Fluorescence Enhancement Using Renewable Drop-based Spectrofluorimetry |
| DAI Chun-Xia（Department of Chemistry&Environment; Changsha University of Science & Technology; Changsha 410007; China） |
| Abstract：A novel renewable liquid drop sensor was proposed for quantitative assay of hydrogen peroxide based on fluorescence enhancement of thiamine due to its oxidation in basic medium.The dynamically growing and falling drops serve as windowless optical cells.The optimum analytical conditions have been established.The sensor showed linear response in the range of 2.5×10-5 mol/L ～1.9×10-4 mol/L with the limits of determination of 4.88×10-6 mol/L.Besides its high sensitivity,the sensor permits a simple,fast,and inex... |
| Key words：hydrogen peroxide; thiamine; fluorescence enhancement; liquid drop |
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收稿日期：2005-09-22
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