1936年,Ferrell等用电势法研究硫氰酸鋅体系,认为溶液中有ZnSCN~+絡离子,其稳定常数为K_1=50。1953年Frank等用极譜法証明溶液中有Zn(SCN)~+,Zn(SCN)_2,Zn(SCN)_3~-和Zn(SCN)_4~=四种络合物,其稳定常数为K_1=3,K_2=7,K_3=1,K_4=20。1956年等再用电势法研究这一体系,証明溶液中有Zn(SCN)~+和Zn(SCN)_3~-二种絡合物,其稳定常数为K_1=34,K_3=152。1957年等用分光光度法研究在不同离子 In 1936, Ferrell et al. Used potential method to study the zinc thiocyanate system and found that there is ZnSCN ~ + complex ion in the solution with the stability constant of K_1 = 50. In 1953, Frank et al demonstrated polarography of Zn (SCN) ~ The stability constants for the four complexes are K_1 = 3, K_2 = 7, K_3 = 1, K_4 = 20.1956, Zn_4, Zn_4, Zn_4, Zn_4, Years and so on, and then use potential method to study this system, proving the solution has Zn (SCN) ~ + and Zn (SCN) _3 ~ - two complexes, the stability constant K_1 = 34, K_3 = 152. 1957 Use spectrophotometry to study different ions