共查询到20条相似文献,搜索用时 140 毫秒
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无机离子交换剂以其选择性、耐热及抗辐照性很高一直受到重视.但由于它的交换过程缓慢,使其应用受到了限制,为了克服这一障碍,本文把十分之几微米的无机离子交换剂[Ti(HPO_4)_2·1/2H_2O]微晶粘结成球,以减低对流体阻力,同时大大增加交换表面.用这种交换剂研究了H~+-Li~+和Li~+-H~+互交换的动力学;同时,根据交换剂的几何模型,解出了相应界面条件的扩散方程.实验显示了在这种无机离子交换剂中的交换速度比在001×20的聚苯乙烯凝胶磺酸型阳离子交换树脂中的快3.5倍,它可能为提高无机离子交换剂的传质功能提供了新途径. 相似文献
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用水合五氧化二锑分离放射性母子体的研究─—一个新的~(201)Pb—~(201)T1发生器的制备 总被引:1,自引:0,他引:1
本文研究了无机离子交换剂—水合五氧化二锑(Sb2O5·nH2O)的制备,并用它分离了放射性母子体,制备了一个新的201Pb—201Tl放射性发生器。结果表明,末发生器具有高效、快速、简便的特点,此外还讨论了离子交换反应的机理。 相似文献
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本文报道一种新的无机离子交换剂—微晶形焦磷钒酸锡的合成条件,物理—化学性质和应用研究。表明它是一种表现离子交换容量大(3.17mmmol/g)、热和化学稳定性好、对Ag(Ⅰ)、Cu(Ⅱ)、Pb(Ⅱ)、Bi(Ⅲ)、及Zr(Ⅳ)具有较高的选择性的多功能基阳离子交换剂。 相似文献
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S. Malja K. Schomacker E. Malja 《Journal of Radioanalytical and Nuclear Chemistry》2000,245(2):403-406
The production of 90Y by 90Sr-90Y generator was studied. 90Sr was adsorbed on a column with Aminex A-5 resin. The daughter radionuclide 90Y was eluted with 0.7M -hydroxyisobutyrate (-HIB, pH 5.4). Radionuclidic, radiochemical and chemical purities were >98% and yield >85%. After converting into chloride form 90YCl3-solution (pH:1) was used for preparing injectable yttrium citrate and labeling some other radiopharmaceuticals. Furthermore, a fast ITLC-method for the determination of 90Sr in 90Y-eluate was developed. 相似文献
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W. Czysz und A. Emr 《Fresenius' Journal of Analytical Chemistry》1965,214(3):206
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No-carrier-added 90Y was separated from 90Sr via colloid formation of 90Y in basic media. The mixture was passed through glass wool or membrane filter. The filtrate contained 90Sr, while 90Y was retained on glass wool/membrane filter. Yttrium-90 was extracted with 0.1 M HCl. Contamination of 90Sr was <0.0001%. More than 98% labeling yield of 90Y-EDTMP was confirmed by paper chromatography. 相似文献
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Klaus Brodersen 《Fresenius' Journal of Analytical Chemistry》1958,163(2):136
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A. Kurtenacker 《Fresenius' Journal of Analytical Chemistry》1962,187(1):40-41
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A remarkable extraction chromatographic method for the preparation of90Y of high radiochemical purity has been developed. The generator consists of silica gel coated crown ether. It functions as a strong adsorber for90Sr and in the meantime high purity of90Y is eluted with a dilute solution of picric acid after a suitable period. The experiments indicated that DC18C6 coated silica gel is better than that of DB18C6 coated. The extraction capacity of strontium on 3.8% DC18C6 coated silica gel is 5.6 mg Sr/g silica gel. Yttrium is obtained with more than 95% milking yield with radionuclide purity greater than 99.9%. The extraction chromatographic generator does not change its characteristics even after 5 elutions. 相似文献
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