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钨的高灵敏显色反应的研究:W(V)-SCN-RhB(I)-动物胶体系 总被引:8,自引:0,他引:8
研究了用罗丹明B(RhB)和硫氰酸盐作显色剂,动物胶为分散剂.W(V)-SCN-RhB(I)三元配合物在水相直接测钨的方法,试验表明,方法有避免使用有毒有机溶剂、体系稳定、灵敏度高的优点,在用于测定自来水中痕量钨时,简便快速,结果满意. 相似文献
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《Composite Interfaces》2013,20(7-9):709-729
The controlled integration of organic and inorganic components confers superior mechanical properties onto natural bone. The present work adds to the continuing efforts of designing a natural bone-like structure. In this study, the hydroxyapatite (HAP) impregnated polymeric composites of polyacrylamide (PAM) and the same with gelatin have been synthesized by a suspension polymerization method in order to study their blood compatibility, water sorption behavior, and mechanical properties; and network parameters, such as average molecular weight between crosslinks (M c), crosslink density (q) have been calculated. Both, HAP–PAM and PAM–gelatin–HAP composites were characterized using techniques like Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) studies, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The composites were also evaluated for their mechanical properties like compressive strength and modulus (E). 相似文献
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过渡金属离子与明胶相互作用的研究 总被引:3,自引:0,他引:3
利用荧光猝灭法,研究了pH值10.0,不同温度下,Mn^2+,Co^2+,Ni^2+,Hg^2+与明胶的相互作用。计算了猝灭常数、螯合平衡常数和结合位点数。紫外光谱和显微红外光谱的测定结果表明,Mn^2+,Co^2+,Ni^2+与明胶分子中的酰胺键发生了作用。确定了猝灭机理。计算得出的热力学函数表明,在Mn^2+,Co^2+,Ni^2+对明胶荧光的猝灭过程中,熵效应起着重要的作用。 相似文献
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