透過您的圖書館登入
IP:3.129.69.151
  • 期刊

茶葉及咖啡中咖啡因之含量分析

Determination of Caffeine Content in the Tea and Coffee

摘要


咖啡因具有中樞神經興奮作用,廣泛存在於植物及一般飲料中,本研究利用靈敏的高效液相層析法進行咖啡因的含量分離。以0.1M硼酸鈉緩衝液(pH6.4)一甲醇(72:28, v/v)爲移動相,使用C-18的分離管柱;流速爲每分鐘1ml進行分離,並以紫外光檢測器偵測,波長設在270nm。咖啡因的偵測極限是10ng/ml。分析結果顯示,在飲料產品中,以咖啡A的咖啡因含量最高(503.58±1.28μg/ml);在茶葉與咖啡產品中,咖啡咖啡因的含量(39.8±0.3mg/g)較茶葉高。

並列摘要


Caffeine was found in a number of plants and beverages, the content of caffeine was determined using a sensitive high-performance liquid chromatographic method. The separation was achieved on a liquid chromatographic reversed-phase 5C18 column with a mobile phase of 0.1M sodium borate huller (pH 6.4)-methanol (72:28, v/v) at a flow rate of 1mL/min. The eluted caffeine was detected with 270nm. The limit of detection of caffeine was 10ng/mL. These results suggested among the beverages, the coffee had the greatest caffeine content (503.58±1.28μg/mL), and among tea and coffee products, coffee had greater caffeine content (39.8±0.3 mg/g).

被引用紀錄


薛凱文(2007)。台北市某國中學生之危害健康含糖飲料飲用行為及其影響因素〔碩士論文,國立臺灣師範大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0021-0204200815530053

延伸閱讀