[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f1sRUJOANxxAZP9pMR38VdilQuXjngJa-Jv4yaamvBvc":3},{"id":4,"source":5,"question":6,"options":7,"answer":8,"related":9,"type":113,"origin":114,"createTime":121},93877608,"v1","在有机试剂中,一般三氯甲烷对游离生物碱的溶解度较大",[],[],[10,23,33,43,53,63,73,83,93,103],{"id":11,"source":5,"question":12,"options":13,"answer":18,"related":19,"type":20,"origin":21,"createTime":22},87746876,"将酸性提取液调pH至强碱性产生的沉淀为( )",[14,15,16,17],"黄酮类","生物碱","酸性成分","脂类",[],[],0,null,"2023-06-29T00:51:06+08:00",{"id":24,"source":5,"question":25,"options":26,"answer":31,"related":32,"type":20,"origin":21,"createTime":22},87746877,"某生物碱碱性很弱,几乎呈中性,氮原子的存在状态可能为()",[27,28,29,30],"仲胺","伯胺","酰胺","叔胺",[],[],{"id":34,"source":5,"question":35,"options":36,"answer":41,"related":42,"type":20,"origin":21,"createTime":22},87746878,"从生物碱水提取液中分离出季铵碱可采用()",[37,38,39,40],"碱化后乙醚萃取","碱化后三氯甲烷萃取","碱化后正丁醇萃取","碱化后丙酮萃取",[],[],{"id":44,"source":5,"question":45,"options":46,"answer":51,"related":52,"type":20,"origin":21,"createTime":22},87746879,"生物碱在植物体内大多数以什么状态存在()",[47,48,49,50],"游离状态","苷的形式","有机酸盐","无机酸盐",[],[],{"id":54,"source":5,"question":55,"options":56,"answer":61,"related":62,"type":20,"origin":21,"createTime":22},87746880,"吸附色谱法分离生物碱常用的吸附剂是( )",[57,58,59,60],"氧化铝","活性炭","聚酰胺","硅胶",[],[],{"id":64,"source":5,"question":65,"options":66,"answer":71,"related":72,"type":20,"origin":21,"createTime":22},87746881,"用氧化铝薄层色谱法分离生物碱时,化合物的Rf 值大小取决于( )",[67,68,69,70],"酸性大小","碱性大小","分子大小","极性大小",[],[],{"id":74,"source":5,"question":75,"options":76,"answer":81,"related":82,"type":20,"origin":21,"createTime":22},87746882,"生物碱在自然界分布最多的是()",[77,78,79,80],"菌类","双子叶植物","裸子植物","单子叶植物",[],[],{"id":84,"source":5,"question":85,"options":86,"answer":91,"related":92,"type":20,"origin":21,"createTime":22},87746883,"生物碱不具有的特点是( )",[87,88,89,90],"N原子多在环内","分子中含N原子","分子中多有苯环","具有碱性",[],[],{"id":94,"source":5,"question":95,"options":96,"answer":101,"related":102,"type":20,"origin":21,"createTime":22},87746884,"生物碱的沉淀反应在以下何种溶液中进行( )",[97,98,99,100],"中性","酸性","碱性","有机溶剂中",[],[],{"id":104,"source":5,"question":105,"options":106,"answer":111,"related":112,"type":20,"origin":21,"createTime":22},87746885,"若将中草药中所含生物碱盐类及游离生物碱都提取出来,应选用的溶剂为()",[107,108,109,110],"乙醇","水","三氯甲烷","乙醚",[],[],3,{"courseName":115,"courseImg":116,"workName":117,"workId":118,"count":119,"courseId":120},"天然药物化学","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdb3a5eb6177bf85ad556cb52c242afa2.jpg","生物碱二","work_28347803",146,"0d5b7b3c9b5a9e0f37e40770a532eb34","2023-07-08T22:32:19+08:00"]