關(guān)于菠蘿果實采用全自動快速研磨儀研磨提取脂肪酸的一種方法-上海凈信
第一段:背景知識介紹
陜西科技大學(xué)化工學(xué)院老師需要提取菠蘿果實中脂肪酸的含量,并進(jìn)行下一步的科學(xué)研究,要求是將成熟的菠蘿果實切成片,在自然狀態(tài)下晾干或者是烘箱內(nèi)烘干水分,使樣品呈干樣,然后研磨提取。眾所周知,菠蘿果實中糖分的含量較高,干樣在研磨過程中容易結(jié)塊,研磨難度增大,之前采用研缽手工研磨的方法,在研缽內(nèi)倒入液氮,在凍干狀態(tài)下快速研磨,通常需要3次左右才能研磨,且研磨樣品不充分,實驗效果未達(dá)到預(yù)期,老師不是很滿意?,F(xiàn)采用全自動快速研磨儀研磨的方法研磨菠蘿果實干樣。
(附上樣品圖片)
第二段:描述一下樣品研磨原理
菠蘿果實干樣纖維及糖度含量較高,研磨時在液氮冷凍狀態(tài)下凍干樣品,采用鋼罐加鋼珠研磨
第三段:樣品具體研磨方法
實驗步驟:
步驟1:菠蘿果實樣品和的研磨鋼罐
步驟2 :將樣本放入鋼罐中,然后再將鋼罐放入液氮中浸泡幾分鐘,
步驟3:設(shè)置參數(shù)研磨頻率,時間設(shè)置好就可研磨成粉狀,
步驟4:從凈信研磨儀上取出樣本,將鋼罐打開倒出樣品。
實驗結(jié)果(放前后研磨對比圖)
研磨后樣品在液氮冷凍狀態(tài)下呈細(xì)小分散的粉末狀,一旦回復(fù)到常溫則立即粘附牢固粘在一起結(jié)塊,滿足實驗要求。
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