排序方式: 共有3条查询结果,搜索用时 6 毫秒
1
1.
2.
The ionic conductivity of the solutions formed from 1-n-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]) or 1-n-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) and different molecular solvents (MSs) were measured at 298.15 K. The molar conductivity of the ionic liquids (ILs) increased dramatically with increasing concentration of the MSs. It was found that the molar conductivity of the IL in the solutions studied in this work could be well correlated by the molar conductivity of the neat ILs and the dielectric constant and molar volume of the MSs. 相似文献
3.
某红外干扰烟幕材料中镁、铝、铜元素的含量直接影响其干扰性能。化学滴定法是测定金属元素含量的传统方法,但这种方法过程繁琐、冗长,只能依次测定,且在铝和铜同时存在下无法对镁元素定量分析。建立了一种采用浓硝酸消解样品,对消解液过滤、稀释后直接用电感耦合等离子发射光谱(ICP-OES)法测定某红外干扰烟幕材料中镁、铝、铜元素含量的方法。当Mg、Al、Cu的分析线选择279.5、167.0和324.7 nm时,其检测限分别达到0.013、0.040和0.025μg/mL,且样品测定的加标回收率均在102%~105%,相对标准偏差在1.0%~3.0%(n=8),表明方法的准确度和精密度均良好。还对方法的总标准偏差进行了溯源,并与络合滴定法结果进行了比较。显著性检验表明两种方法的结果无显著性差异,但ICP-OES法更简便、快速,并能对三种元素同时测定,因此可完全替代传统的化学滴定法。 相似文献
1