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題名 | Flow Injection Analysis of Kojic Acid in Cosmetics by a Carbon-Nanotube Modified Screen-Printed Electrode=奈米碳管修飾網版印刷電極分析化妝品中麴酸 |
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作者 | 石瑩; 曾志明; 柯志杭; 徐照程; 陳珮琪; | 書刊名 | 藥物食品分析 |
卷期 | 15:2 2007.06[民96.06] |
頁次 | 頁151-155+208 |
分類號 | 412.36 |
關鍵詞 | 奈米碳管; 網版印刷電極; 麴酸; 流動注入分析法; 化妝品; Carbon nanotubes; Screen-printed electrode; Kojic acid; Flow injection analysis; Cosmetics; |
語文 | 英文(English) |
中文摘要 | 研究發現將新式的奈米碳管網版印刷電極(CNT/SPE)應用至流動注入分析法時具有高度價值。影響分析物在電極上氧化程序的變因包括:pH、施加電位、流速、奈米碳管的塗佈量等,在本研究中皆被深入探討。最佳條件下,於濃度範圍 0.1-120 ppm的校正曲線實驗,顯現良好線性關係,偵測極限(S/N=3)可達0.01ppm,相對於一般未修飾之網版印刷電極(SPE),CNT/SPE在麴酸分析時提供更高的感應靈敏度。研究結果顯示出CNT/SPE具有優良的穩定度與再現性,揭示其未來在液相層析系統的應用潛力。以分批製備的五組CNT /SPE對20 ppm麴酸樣品進行分析,由結果RSD值4.43%可知本研究之電極製備程序具良好再現性。最後,對含麴酸化妝品分析的可靠結果,證明本系統可作爲化妝品中麴酸成份檢測之利器。 |
英文摘要 | A novel carbon-nanotube modified screen-printed electrode (CNT/SPE) was successfully prepared and validated to be a useful detector in the flow injection system. Compared to a bare screen-printed electrode (SPE), CNT/SPE improved the detection limit for kojic acid (KA). The detection limit on S/N = 3 was as low as 0.01 ppm. Furthermore, several factors, including the pH, applied potential, flow rate and coating quantity of CNT, were assessed. The attractive response of CNT/SPE has allowed it to be used for constant-potential FIA (Flow-Injection Analysis) of KA and indicates great potential for monitoring chromatographic effluents. The linear relationship between KA concentration (0.1-120 ppm) and the current response was established. Meanwhile five different CNT/SPEs for the detection KA of 20 ppm yielded a RSD value of 4.43%, indicating acceptable reproducibility of the present analysis. Finally, two real samples on the market were analyzed using the proposed system with appreciable results. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。