论文部分内容阅读
络合滴定法由于简便、快速、准确度也高,因而广泛地应用于工业分析的许多领域.三元络合物由于稳定性增加,反应条件宽容,显色对比度增大,应用于络合滴定中,扩大了应用范围,改善了实验条件,并使滴定终点敏锐;由于许多三元络合物有疏水性和可萃性,因而很易把沉淀分离、溶剂萃取和络合滴定结合起来,提高了络合滴定的选择性.这使络合滴定的长处得以发扬,缺点得以克服,因而使络合滴定的发展有了新的改观.现从以下三个方面介绍三元络合物在络合滴定中的应用.
Complexometric titration is widely used in many fields of industrial analysis due to its simplicity, rapidness and high accuracy. Ternary complexes are used in complexometric titration due to their increased stability, tolerable reaction conditions and increased color contrast , Widen the range of applications, improve the experimental conditions and make the endpoint of the titration sharp. Due to the hydrophobicity and extractability of many ternary complexes, precipitation separation, solvent extraction and complexometric titration are easy to combine and increase The selectivity of the complexed titration.This makes the merits of titration to carry forward the strengths and weaknesses to be overcome, so that the development of complexed titration has been a new look.Considering the following three aspects of ternary complexes in the complex Titration in the application.