摘要
从pH 3.0的水溶液中,在较大量的硫酸铵存在下,Pt(Ⅳ)以Pt(SCN)62-形式定量萃取入乙醇中。萃取体系中各试剂的适宜用量为硫氰酸铵溶液20 g.L-1,硫酸铵溶液300 g.L-1,乙醇0.30 mL.mL-1,按此条件可达到Pt(Ⅳ)与适量的Ni(Ⅱ),Cr(Ⅲ),Co(Ⅱ),Fe(Ⅱ),Mn(Ⅱ),Al(Ⅲ),Rh(Ⅲ)等离子分离。此方法已用于催化剂Ni-Pt/Al2O3试样分析中作为分离手段。对一件上述催化剂试样进行5次测定,测得铂的平均结果为w(Pt)0.104%,RSD为1.7%。
It was found that platinum(Ⅳ) was quantitatively extracted into ethanol in the form of Pt(SCN)6^2- in the presence of relatively large amount of ammonium sulfate from a solution of pH 3. 0. The optimum amounts of the reagent present in the extraction system were as follows: NH4 SCN 20 g · L^-1, (NH4)2 SO4 300 g · L^-1 ethanol 0. 30 mL · mL^-1. Under these conditions, Pt(Ⅳ ) was effectively separated from appropriate amounts of Ni( Ⅱ ), Cr(Ⅲ), Co(Ⅱ ), Fe( Ⅱ), Mn( Ⅱ ), Al( Ⅲ ) and Rh( Ⅲ ). This method has been applied to the analysis of Ni-Pt/ Al2O3 catalyst as a separation process, and 5 determinations of Pt( Ⅳ ) in a catalyst sample were performed giving an average result of w(Pt) 0. 104% with RSD of 1.7%.
出处
《理化检验(化学分册)》
CAS
CSCD
北大核心
2006年第4期240-242,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
萃取分离
Pt(Ⅳ)
乙醇
硫氰酸铵
硫酸铵
Extractive separation
Platinum(Ⅳ)
Ethanol
Ammonium thiocyanate
Ammonium sulfate