J9九游会AG

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索氏提取器

索氏(shi)提(ti)取(qu)(qu)(qu)(qu)器(qi)(qi),又称脂(zhi)(zhi)肪(fang)抽(chou)(chou)取(qu)(qu)(qu)(qu)器(qi)(qi)或(huo)脂(zhi)(zhi)肪(fang)抽(chou)(chou)出器(qi)(qi)。索氏(shi)提(ti)取(qu)(qu)(qu)(qu)器(qi)(qi)是由(you)提(ti)取(qu)(qu)(qu)(qu)瓶、提(ti)取(qu)(qu)(qu)(qu)管(guan)、冷凝(ning)器(qi)(qi)三部分(fen)组成的,提(ti)取(qu)(qu)(qu)(qu)管(guan)两侧分(fen)别有虹吸管(guan)和连接(jie)管(guan),各部分(fen)连接(jie)处要严(yan)密(mi)不能(neng)漏气(qi)。提(ti)取(qu)(qu)(qu)(qu)时,将待测样品(pin)包在脱脂(zhi)(zhi)滤纸包内,放(fang)入提(ti)取(qu)(qu)(qu)(qu)管(guan)内。提(ti)取(qu)(qu)(qu)(qu)瓶内加(jia)入石(shi)(shi)油醚,加(jia)热提(ti)取(qu)(qu)(qu)(qu)瓶,石(shi)(shi)油醚气(qi)化,由(you)连接(jie)管(guan)上升进入冷凝(ning)器(qi)(qi),凝(ning)成液(ye)体(ti)滴入提(ti)取(qu)(qu)(qu)(qu)管(guan)内,浸提(ti)样品(pin)中的脂(zhi)(zhi)类物(wu)质。待提(ti)取(qu)(qu)(qu)(qu)管(guan)内石(shi)(shi)油醚液(ye)面达到一定高度,溶(rong)有粗脂(zhi)(zhi)肪(fang)的石(shi)(shi)油醚经虹吸管(guan)流(liu)入提(ti)取(qu)(qu)(qu)(qu)瓶。流(liu)入提(ti)取(qu)(qu)(qu)(qu)瓶内的石(shi)(shi)油醚继续被加(jia)热气(qi)化、上升、冷凝(ning),滴入提(ti)取(qu)(qu)(qu)(qu)管(guan)内,如此循(xun)环往复,直到抽(chou)(chou)提(ti)完全为止。 

从固体(ti)物(wu)质(zhi)中萃取(qu)(qu)化合物(wu),在实验(yan)室(shi)多采用索氏提(ti)(ti)取(qu)(qu)器(qi)(脂肪提(ti)(ti)取(qu)(qu)器(qi))来提(ti)(ti)取(qu)(qu)。索式提(ti)(ti)取(qu)(qu)器(qi)就是(shi)利(li)用溶(rong)剂(ji)回流及虹吸原理,使(shi)固体(ti)物(wu)质(zhi)连续不断地被纯(chun)溶(rong)剂(ji)萃取(qu)(qu),既节约溶(rong)剂(ji),萃取(qu)(qu)效率又(you)高(gao)。 

萃(cui)(cui)取(qu)(qu)前(qian)先(xian)将固(gu)(gu)体(ti)(ti)物(wu)(wu)质研(yan)碎,以增(zeng)加(jia)固(gu)(gu)液接(jie)触的(de)(de)面积。然(ran)后,将固(gu)(gu)体(ti)(ti)物(wu)(wu)质放在(zai)滤纸包内(nei),置于提(ti)取(qu)(qu)器(qi)中(zhong),提(ti)取(qu)(qu)器(qi)的(de)(de)下端与盛有(you)浸(jin)出(chu)溶(rong)(rong)(rong)剂的(de)(de)圆(yuan)底(di)烧(shao)瓶(ping)相连(lian)(lian),上面接(jie)回(hui)流冷凝(ning)(ning)管(guan)(guan)(guan)。加(jia)热圆(yuan)底(di)烧(shao)瓶(ping),使溶(rong)(rong)(rong)剂沸(fei)腾,蒸气通过连(lian)(lian)接(jie)管(guan)(guan)(guan)上升,进入(ru)到(dao)冷凝(ning)(ning)管(guan)(guan)(guan)中(zhong),被(bei)冷凝(ning)(ning)后滴入(ru)提(ti)取(qu)(qu)器(qi)中(zhong),溶(rong)(rong)(rong)剂和固(gu)(gu)体(ti)(ti)接(jie)触进行萃(cui)(cui)取(qu)(qu),当(dang)提(ti)取(qu)(qu)器(qi)中(zhong)溶(rong)(rong)(rong)剂液面达到(dao)虹(hong)吸(xi)管(guan)(guan)(guan)的(de)(de)最高处时,含有(you)萃(cui)(cui)取(qu)(qu)物(wu)(wu)的(de)(de)溶(rong)(rong)(rong)剂虹(hong)吸(xi)回(hui)到(dao)烧(shao)瓶(ping),因而萃(cui)(cui)取(qu)(qu)出(chu)一部分物(wu)(wu)质。然(ran)后圆(yuan)底(di)烧(shao)瓶(ping)中(zhong)的(de)(de)浸(jin)出(chu)溶(rong)(rong)(rong)剂继续蒸发、冷凝(ning)(ning)、浸(jin)出(chu)、回(hui)流,如此重复(fu),使固(gu)(gu)体(ti)(ti)物(wu)(wu)质不断为纯的(de)(de)浸(jin)出(chu)溶(rong)(rong)(rong)剂所萃(cui)(cui)取(qu)(qu),将萃(cui)(cui)取(qu)(qu)出(chu)的(de)(de)物(wu)(wu)质富集(ji)在(zai)烧(shao)瓶(ping)中(zhong)。液-固(gu)(gu)萃(cui)(cui)取(qu)(qu)是利(li)用(yong)溶(rong)(rong)(rong)剂对固(gu)(gu)体(ti)(ti)混(hun)合物(wu)(wu)中(zhong)所需成分的(de)(de)溶(rong)(rong)(rong)解(jie)度(du)大,对杂(za)质的(de)(de)溶(rong)(rong)(rong)解(jie)度(du)小来达到(dao)提(ti)取(qu)(qu)分离(li)的(de)(de)目(mu)的(de)(de)。