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                                                                                                                                速測試劑盒
                                                                                                                                首頁  -  快速檢測試劑  -  速測試劑盒

                                                                                                                                茶多酚速測試劑(茶飲料)


                                                                                                                                產品描述


                                                                                                                                茶飲料中茶多酚速測盒


                                                                                                                                (一)試劑盒組成

                                                                                                                                試劑1,試劑2,管制瓶,比色卡,說明書

                                                                                                                                95%乙醇   自備

                                                                                                                                (二)樣品處理

                                                                                                                                ①    如果樣品比較透明(如果味茶飲料),可將樣品充分搖勻后備用。

                                                                                                                                ②    較渾濁的樣液,如果汁茶飲料

                                                                                                                                稱取充分混勻的樣液25ml于50ml容量瓶中,加入95%乙醇15ml,充分搖勻后放置15分鐘后,用水定容至刻度。用慢速定量濾紙過濾,濾液備用。

                                                                                                                                ③    含碳酸氣的樣液量取充分混勻的樣液100ml與250ml燒杯中,稱取其總質量,然后置于電爐上加熱至沸騰,在微沸狀態下加熱10分鐘,將二氧化碳排除。冷卻后,用水補足其原來的質量。搖勻后備用。


                                                                                                                                (三)檢測步驟及結果判定

                                                                                                                                取試液1ml于5ml管制瓶中,加入試劑1號1毫升,混勻后加入試劑2號3ml?;靹蜢o置10分鐘,與比色卡比色,找到相應的色階,該色階所對應的讀數就是該試樣茶多酚含量。




                                                                                                                                指標

                                                                                                                                茶湯飲料

                                                                                                                                調味茶飲料

                                                                                                                                濃茶型

                                                                                                                                淡茶型

                                                                                                                                果味型

                                                                                                                                果汁型

                                                                                                                                碳酸型

                                                                                                                                奶味型

                                                                                                                                其他型

                                                                                                                                茶多酚

                                                                                                                                mg/L

                                                                                                                                紅茶

                                                                                                                                400

                                                                                                                                250


                                                                                                                                200


                                                                                                                                100


                                                                                                                                250


                                                                                                                                150

                                                                                                                                烏龍茶

                                                                                                                                500

                                                                                                                                300

                                                                                                                                綠茶

                                                                                                                                600

                                                                                                                                400

                                                                                                                                花茶

                                                                                                                                應符合相應的茶坯類型的規定



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