排序方式: 共有11条查询结果,搜索用时 31 毫秒
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离子色谱法测定水中的氯酸根 总被引:3,自引:0,他引:3
介绍了用抑制型离子色谱法测定水中的氯酸根,并用该法对游泳池水,自来水及已分解的次氯酸钠溶液中的氯酸根含量进行了测定,结果较为满意。 相似文献
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聚苯乙烯超临界流体脱挥研究 总被引:5,自引:0,他引:5
经实验研究,确定了聚苯乙烯超临界流体脱挥的优化操作条件:温度为343K,压力为18MPa,CO2与PS的投料比为2.0~3.0LCO2/h·gPS。在该条件下脱挥3h,可使聚苯乙烯中的挥分含量从1%降至0.2% 相似文献
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Two 1D coordination polymers [Ln2(dpdc)3(tpy)2·H2O]n [Ln=Nd 1, Yb 2, H2dpdc=2,2’-biphenyldicarboxylic acid and tpy= 2,2’:6’,2’’-terpyridine] and one dinuclear complex Er2(dpdc)2(Hdpdc)2(tpy)2 3 were obtained via hydrothermal reactions and determined by X-ray diffraction analysis. The crystal structure data of 1 and 2 revealed that two coordination polymers were isostructural and possessed a 1D chain framework consisting of eight-coordinated Ln(III) centers. In the asymmetric unit, the two Er(III) ions in 3 were both nine-coordinated and had similar coordination environments. The Er(III) ions were bridged by dpdc2-ligands into dinuclear structures. The complexes were also characterized by IR spectra and thermogravimetric analysis. The solid fluorescence of 1 and 3 was also investigated at room temperature. 相似文献
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β—环糊精及其某些衍生物对酚的包合作用 总被引:2,自引:0,他引:2
以几种简单酚为例,用吸收光谱法、核磁共振光谱法以及药绵荧光I1/I3比率探针法比较研究了β-环糊精(β-CD)、羟乙基-β-环糊精(HEβCD)及三甲基-β-环糊精(TMβCD)与这些简单酚间的相互作用。结果研究表明,就这种相互作用的机理而言,主要是酚的羟基与CD8腔口间的氢键作用,同时苯酚或取代苯酚类对环糊精及其衍生物的空腔起空间调节器作用。 相似文献
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以 Cd (Ⅱ)-Cadion和 Cd (Ⅱ)-Cadion 2B为探针,比较了离子表面活性剂,离子.非离子混合表面活性剂,a-,β,r-环糊精及表面活性剂和β-环糊精对探针体系的增效作用,探讨了这些增效试剂增效作用的机理和特点。 相似文献