The RRS intensity was enhanced greatly when Co(Ⅱ) reacted with PAN to form cation chelate complex which further reacted with SDBS to form an ion-association complex in a pH=9.

4,Raloxifene reacts with Evans blue and forms an ion-association complex.

This paper introduced the application of ion-association complex for the Solid-Phase Reflection Spectrophotometry which is used in Silver analysis.

A highly sensitive spectrophotometric method was developed for the determination of trace amounts of Iodine based on the oxidation of I~- to I_3~- by IO_3~- and the further reaction of I_3~- with acridine red to form the ion-association complex [AO][I_3]in dilute phosphoric acid solution.

8 KHC_(8)H_(4)O_(4)-HCl buffer solution, in the presence of gum arabic and polyvinyl alcohol ,IO~-_3 oxidated I~- to produce I~-_3, then I~-_3 reacted with methylene blue to form an ion-association.

The formation of an ion-association among As-Sb-Mo blue and rhodamine B is well distributed in aqueous solution as a steady system under the existence of polyvinyl alcohol .

It bases on the fact that in acetic acid medium, Hg2+ ion can catalyze the substitute reaction of CN ligand in [Fe(CN)6]4-by 2,2'-bipyridyl (bipy), and the resultant [Fe(bipy)3]2+ cation can react with FinBr4 anion of tetrabromofluorescein (HFinBr4) to form ion association complex [Fe(bipy)3]2+[(FinBr4)2]2- which can emit phosphorescent signal on filter paper substrate.

Study on flotation separation of cadmium(Ⅱ) by ionic associated system;

The method was based on the NFLX can reacted with Zn(SCN)4~2- and formed ion associate deposition, so the content of NFLX can be determined indirectly by FAAS.