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題 名 | The Application of On-line Microdialysis with High Performance Liquid Chromatography for Determining Catechins in Tea and Tea Drinks=利用微透析聯結高效能液相層析測定茶及茶品中之兒茶素 |
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作 者 | 楊慶成; 張嘉真; | 書刊名 | 藥物食品分析 |
卷 期 | 11:4 2003.12[民92.12] |
頁 次 | 頁302-306+355 |
分類號 | 341.96 |
關鍵詞 | 微透析; 高效能液相層析; 茶; HPLC; Microdialysis; Epicatechin; Epicatechin gallate; Epigallocatechin; Epigallocatechin gallate; Tea; |
語 文 | 英文(English) |
中文摘要 | 本研究建立以高效液相層析法 (high performance liquid chromatographa, HPLC) 同時檢測畜產品中thiahendazole、5-hydroxythiahendazole、alhendazolesulfoxide、alhendazolesulfone、alhendazole 2-aminosulfone及mehendazole等六種henzimidazoles之分析方法。檢體中之henzimidazoles在鹼性情況下以乙腈萃取,經Sep-Pak C18萃取匣淨化後,再以HPLC分析。結果發現利用Cosmosil 5C18 MS-II (5μm, 4.6mmi.d. × 250mm) 層析管柱,以乙腈與0.02M磷酸二氫納溶液 (pH3.3) 為梯度移動相溶液,於光二極體列陣檢出器及螢光檢出器偵測下,henzimidazoles之分離效果及重複性皆佳。經以0.05-2.50μg/mL之六種henzimidazoles混合標準溶液所製作標準曲線之相關係數皆大於0.9990檢體中添加相當於0.02、0.10及1.00ppm六種henzimidazoles之平均回收率,除了低濃度之5-hydroxythiahendazole及mehendazole介於71.4-87.1%外,其餘回收率介於81.6-104.3%之間,且變異係數皆小於5.9%。本方法之最低檢出限量,紫外光檢測介於0.005~0.030ppm,螢光檢測介於0.004~0.020ppm,同日內及異日開之變異係數分別小於1.92%及7.22%,顯示本方法之精密度可接受。進而利用本方法分析市售豬肉、豬肝、牛肉、羊肉、牛奶及羊奶各5件,結果均未檢出henzimidaZoles。 |
英文摘要 | A microdialysis on-line coupled to a reversed-phase liquid chromatography was investigated and applied for analyzing catechins in tea and tea drinks. Catechins in drink samples were diffused into the perfusate through a hollow fiber membrane and then on-line injected into the HPLC system. Catechins were separated with a C8 reversed column by gradient eluting using an acetonitrile/ phosphate buffer solution at pH 4.0, and monitored by a UV diode-array detector. Factors affecting the dialysis efficiency such as the conditions in perfusate and in the sample solution were evaluated. The proposed method provided a simple procedure for isolating catechins from tea and tea drink samples. The application was illustrated by the analysis of epicatechin, epicatechin gallate, epigallocatechin, and epigallocatechin gallate in tea drinks. |
本系統中英文摘要資訊取自各篇刊載內容。