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miraclechu金蟲 (小有名氣)
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[求助]
有關(guān)脂肪酸甲酯化的問題 已有2人參與
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最近在做細(xì)菌脂肪酸的提取和測定,需要將脂肪酸甲酯化后跑GC-MS,查閱了相關(guān)的文獻(xiàn),發(fā)現(xiàn)用的最多的是Morrison and Smith(1964)的方法,即三氟化硼甲醇溶液甲酯化,文獻(xiàn)中有這么一段話 Boron fluoride-methanol reagent was added under nitrogen, in the proportions 1 ml reagent per 4-16 mg of lipid, and the tube was closed with the screw cap. The tube was then heated in a boiling water bath for the requisite time, cooled, and opened. The esters were extracted by adding 2 volumes of pentane, then 1 volume of water, shaking briefly, and centrifuging until both layers were clear. 三氟化硼不是和水劇烈反應(yīng)么,這里加水會不會和三氟化硼反應(yīng)啊 還有就是這篇文獻(xiàn)就是將三氟化硼甲醇溶液加到脂肪酸里擰上蓋子100攝氏度水浴2min就可以,這和國標(biāo)用冷凝管回流什么的簡化了不少,能達(dá)到良好的甲酯化效果么,我看到有的文獻(xiàn)還有在瓶子里擰上蓋子100度水浴40min的 = = 第一次做相關(guān)的實(shí)驗(yàn)完全沒經(jīng)驗(yàn)啊,大神們求解答啊,謝謝謝謝 |

鐵蟲 (初入文壇)

鐵蟲 (初入文壇)

鐵蟲 (初入文壇)

金蟲 (小有名氣)

金蟲 (小有名氣)

木蟲 (著名寫手)
木蟲 (著名寫手)

金蟲 (正式寫手)

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