排序方式: 共有5条查询结果,搜索用时 10 毫秒
1
1.
2.
3.
分光光度法同时测定两个干扰组分的研究 Ⅰ.多波长数据线性回归法及其应用于同时测定微量锰和锌的探讨 总被引:26,自引:0,他引:26
根据在不同波长下两个有色配合物的摩尔吸收率的差异,本文提出用分光光度法同时测定两个干扰组分的“多波长数据线性回归法”.并以微量锰、锌的同时测定为例,考察了方法的可靠性.在非离子表面活性剂TritonX-100存在下,以5-Br-PADAP为显色剂,在540~584nm间,选择十五个波长测量吸光度,以本法处理,当锰∶锌量在1∶10至10∶1时,直线相关系数均大于O.998,回收率为95~120%,回归直线斜率和截距相对波动小于17%.在DDTC等隐蔽剂存在下,直接测定了自来水中锰和锌的含量,获得满意的结果.为两个干扰组分的同时测定提供了一个简便、准确、可靠的新方法. 相似文献
4.
分光光度法同时测定两个干扰组份的研究 I.多波长数据线性回归法及其应用于同时测定微量锰和锌的探讨 总被引:9,自引:0,他引:9
In this paper, a linear regression method of multiwavelength data is proposed. The method, based on the difference of molar absorptivity between two coloured chelates at murti-wavelengths, can be applied to simultaneous spectrophotometric determination of two-interfering-component systems in the visible region. As an example, the availability as well as the optimum condition for simultaneous determination of Mn and Zn with 5-Br-PADAP in the presence of nonionic surfactant Triton X-100 have been studied. Measure the absorbance at 15 wavelengths over the range of 540-584 nm and treat the data with the suggested method, the linear correlation coefficients (γ) are found to be 0.998 in the synthetic mixtures containing microamounts of Mn and Zn with the concentration ratio from 1:10 to 10:1. The recoveries of both elements are 95-120% with the relative standard deviations (N=5) less than 17%. the method has been successfully used for direct determination of Mn and Zn in tap water. The new method proposed in this work is simple, fast and can be used for the analysis of two-interfering-component systems. 相似文献
5.
研究了在有机胶凝剂中掺杂的席夫碱化合物的结构和性质. 实验发现, 虽然席夫碱分子单独不能在有机溶剂中形成凝胶, 当其与一种胶凝剂N,N’-双十八烷基-L-Boc-谷氨酸混合时, 它们在二甲基亚砜或甲苯中形成透明的有机凝胶. 与相应的溶液相比, 观察到在有机凝胶中的荧光增强现象, 并且这一增强与席夫碱的结构有密切关系. 在二甲基亚砜的有机凝胶中, 观察到带有长烷基链的席夫碱具有诱导手性. 表明通过凝胶的形成, 胶凝剂的手性能传递到带有长链的席夫碱上. 相似文献
1