摘要
报道了新显色剂邻磺酸基苯偶氮若丹宁（o-SBAR）的合成及其与钯显色反应的性能。在2.4mol· L^(-1)磷酸介质中,试剂与钯形成 1: 1的桔红色配合物,在 520nm波长处配合物有最大吸收,表观摩尔吸光系数为6.65×10~4,反应速度快,选择性高,应用于钯碳催化剂中钯的测定,结果满意。
In this paper the synthesis of o-sulphobenzenazorhodanine (o-SBAR) and spectrophotome-tric study on its reaction with palladium was reported. In H3PO4(1+1) medium, palladium forms an orange-red complex with o-SBAR which has an absorption maximum at 520nm. The apparent molar absorptivity is 6. 65×104L·mol-1·cm-1. Beer's law is obeyed for palladium in the range of 4-16μg/25ml. A considerable excess of alkali, alkaline-earth and non-ferrous metals does not interfere with the determination. The method is simple and rapid. It has been applied to the determination of palladium in catalysts with satisfactory results.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
1997年第4期155-157,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
光度法
钯
显色剂
SBAR
特效试剂
o-Sulphobenzenazorhodanine Spectrophotometry Palladium determination
