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中药无花果

 
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lin91957
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PostPosted: Tue 9:14, 15 Mar 2011    Post subject: 中药无花果

中药无花果及其口服液中微量元素硒的测定
#183;58’七、加置回收率精密称定果实或叶子各0.5g或精密量取口服浓10ml,分别添加0.05pg硒,按上述方法操作,结果见表1。八、样品分析取样品,按上述方法测定,结果见表2,3。每次测定均需做随行标准曲线,萁相荧系数r不得小于0.999寰1回收率实验结果(n=6)样品I1服谴粜宴叶子徭加罱(】1g)研牧量平均】司收率CV%(ng)()50.2--$1.810052.741.一462口B.280d1.一45.400.B9.B寰2同一批号的样品测定结果古硒盘平均值邶(m1)cv口服霞891218—20.270.20280.240.290.寰3不同批号的祥品谢定结果(n=4)九、稳定性试验按上述方法制各样品测定液,置暗处。分别在0,1,2,3,4和12h测定荧光强度,实验结果表明,卒品在4h内测定基本稳定,12h测定变化较大。讨论一、实验结果表明无花果的叶子中含硒量最高,果实次之。因此无花果属一种能浓集硒的植物其抗癌作用与含硒量存在某种相关性【““。二、Se!与DAN反直生成的苤硒脑,在水溶液申不稳定,故在如入DAN试液后,操作虚尽基在暗处进行,并尽快转入环己烷中,比较稳定。另外·消化温度不宜过高,时间不宜过长’消侣至终点后,应立即停止加热,否则会使硒挥发而损失。三,奉法测定结果的误差小于国家技术监督局批准的《茶叶成份分析标准物质*中规定的Se=0.041±O.010·C·V=24%的误差【5_。‘
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