论文部分内容阅读
在用光度法测铬的显色剂中,迄今为止最理想的仍是二苯偕肼,但试剂与络合物的稳定性较差。要改善二苯偕肼的分析性能,就要合成与研究二苯偕肼的衍生物,从中发现性能更好的显色剂。然而有关这方面的工作比较少,早年虽合成过二萘偕肼及各种带硝基的二苯偕肼衍生物,但它们都不能用于铬的光度测定。以后还合成过苯环上带氯的、带磺酸
Among the chromogenic reagents for the photometric determination of chromium, diphenylhydrazine hydrate is still the best so far, but the stability of the reagents and complexes is poor. To improve the analytical performance of diphenylhydrazine, it is necessary to synthesize and study the derivative of diphenylhydrazine, from which it is found that a better performance of the developer is obtained. However, relatively little work has been done in this area. In the early years, although dinaphthalene hydrazide and various benzodiazepine derivatives with nitro groups were synthesized, none of them can be used for the photometric determination of chromium. After the synthesis of benzene ring with chlorine, with sulfonic acid