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自動索氏提取器、脂肪抽提器、粗脂肪快速測定儀

時間:2020-04-18 18:14     瀏覽:

SUOSHITIQUQI 

 SUOSHITIQUQI,YOUCHENGZHIFANGCHOUQUQIHUOZHIFANGCHOUCHUQI。

索氏提取器是由提取瓶、提取管、冷凝器三部分組成的,提取管兩側分別有虹吸管和連接管,各部分連接處要嚴密不能漏氣。提取時,將待測樣品包在脫脂濾紙包內,放入提取管內。提取瓶內加入石油醚,加熱提取瓶,石油醚氣化,由連接管上升進入冷凝器,凝成液體滴入提取管內,浸提樣品中的脂類物質。待提取管內石油醚液面達到一定高度,溶有粗脂肪的石油醚經虹吸管流入提取瓶。流入提取瓶內的石油醚繼續被加熱氣化、上升、冷凝,滴入提取管內,如此循環往復,直到抽提完全為止。自動索氏提取器、脂肪抽提器、粗脂肪快速測定儀


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打開電源,加熱回流2小時.  構造 實驗時能夠觀察到,隨著回流的進行,當提取筒中回流下的乙醇液的液面稍高于索氏提取器的虹吸管頂端時,提取筒中的乙醇液發生虹吸并全部流回到燒瓶內.然后再次回流, 虹吸,記錄虹吸次數.虹吸5-6次后,當提取筒中提取液顏色變得很淺時,說明被提取物已大部分被提取,停止加熱,移去電熱套,冷卻提取液. 拆除索氏提取器(若提取筒中仍有少量提取液,傾斜使其全部流到圓底燒瓶中),安裝 冷凝管進行蒸餾,至剩余10mL左右時趁熱傾入盛有生石灰的蒸發皿中攪拌成糊狀后蒸干成粉狀(注意不可烤焦)。然后在蒸發皿上蓋一張刺有許多小孔的濾紙(刺孔向上),再將玻璃漏斗罩在濾紙上,繼續加熱,使咖啡因升華。自動索氏提取器、脂肪抽提器、粗脂肪快速測定儀

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