简介：从有有势力反的马尾藻类海草tenerrimum(圣)的乙醇摘录的多酚过敏效果被学习通过列层析优化分离过程。三的吸附和解吸附作用特征广泛地使用了吸附物：宏多孔的树脂，硅石胶化，和polyvinylpolypyrrolidone(PVPP)，非常分别地被评估并且为多酚的准备分离的优化学习了。这些吸附物上的静态的操作显示出多孔的树脂有的那个宏在三吸附物之中的最好的吸附和解吸附作用能力。有包装的列也是的多孔的树脂进行了优化参数例如的宏的动态吸附和解吸附作用：与在方括号显示出的最佳的价值，摘录答案的集中(4次冲淡了)，pH价值(67)，吸附速度(3BVh−1,床volumes/per小时)，乙醇(80%)的集中，elution速度(3BVh−1)和elution体积(7BV)。那么优化的色析法的过程从粗略的多酚给了62.43%的纯净，提供简历的大规模准备的一个有希望的基础在在测试上面的进一步的可伸缩之上的活跃多酚。

简介：LigninservesasoneofthemostimportantmolecularfossilsfortracingTerrestrialOrganicMatters(TOMs)inmarineenvironment.Extractionandderivatizationofligninoxidationproducts(LOPs)arecrucialforaccuratequantificationoflignininmarinesediment.Herewereportamodificationoftheconventionalalkalinecupricoxide(CuO)oxidationmethod,themodificationconsistinginasolidphaseextraction(SPE)andanovelon-columnderivatizationbeingemployedforbetterefficiencyandreproducibility.Inspikingblanks,recoverieswithSPEfortheLOPsarebetween77.84%and99.57%withrelativestandarddeviations(RSDs)rangingfrom0.57%to8.04%(n=3),whilethosewithtraditionalliquid-liquidextraction(LLE)arefrom44.52%to86.16%withRSDsbeingfrom0.53%to13.14%(n=3).Moreover,thereproducibilityisgreatlyimprovedwithSPE,withlesssolventconsumptionandshorterprocessingtime.Theaverageefficiencyofon-columnderivatizationforLOPsis100.8%±0.68%,whichissignificantlyhigherthanthoseofin-vialorin-syringederivatization,thusresultinginstilllessconsumptionofderivatizingreagents.LignininthesurfacesedimentssampledfromthesouthofYangtzeRiverestuary,China,wasdeterminedwiththeestablishedmethod.Recoveriesof72.66%to85.99%withstandarddeviationlessthan0.01mg/10gdryweightareobtainedexceptforp-hydroxyben-zaldehyde.ThelignincontentΣ8(producedfrom10gdrysediment)intheresearchareaisbetween0.231and0.587mg.S/VandC/Vratios(1.028±0.433and0.192±0.066,respectively)indicatethattheTOMsinthisregionareoriginatedfromamixtureofwoodyandnonwoodyangiospermplants;thehighvaluesof(Ad/Al)vsuggestthattheTOMshasbeenhighlydegraded.

简介：高纯净的N2被用来在离子交换树脂的离子纯化期间增加活动阶段流动率。这被执行改进同位素分离和纯化的效率，并且满足快速的multiple-collector-inductively联合的血浆团spectrometry(MC-ICPMS)的效率要求分析。为Cu同位素分离，我们的结果以煤气的流动率显示了那>60mL/min，色析法的山峰拓宽了的分离和恢复率减少了到<99.2%。在另一方面，在Cu山峰的重要变化都没以20mL/min的煤气的流动率被观察，恢复率决心是>99.9%。Cu同位素比率，由标准样品的括方法测量了，同意了在内的引用数据一???牡浡?????????祳据牡潢慮整???????????????ò作？？