Pd-3,5-diBr-PADAP-SDS显色体系的研究  

Study of Pd-3,5-diBr-PADAP-SDS colour system

作　　者：胡守坤[1] 易蓉[1] 张韧 

机构地区：[1]四川大学化学系

出　　处：《天然气化工—C1化学与化工》1992年第6期43-46,共4页Natural Gas Chemical Industry

摘　　要：系统地研究了在阴离子表面活性剂十二烷基硫酸钠存在下,在磷酸介质中,Pd与3,5-diBr-PADAP形成配合物的条件。配合物的λmax为631nm,表观摩尔吸收系数为4.96×104L·mol1·cm-1,配合物的组成比[Pd]:[HR]=1:1,钯含量在0～24μg/10ml范围内服从比尔定律,稳定性好,至少能稳定1 4h,从而建立了测定微量钯的新方法,并已用于催化剂中钯含量的测定,得到了满意的结果。The optimum conditions on complex formation of Pd(Ⅱ) with 2-(3,5-dibromo-2-pyridylazo) -5-diethyl-aminophenol in the presence of SDS and in the medium of phosphoric acid have been systematically studied.The apparent molar absorptivity of complex was measured (4.96×10~4L· mol^(-1)·cm^(-1)).The molar ratio of complex was determined [(Pd)]:(HR)=1:1].It obeys the Beer's law when the content of palladium is in the range of 0～24μg/mol,and has a better stability (at least 14 hours),hence establishing a new method for determination of trace palladium.This method has been applied to determine Pd in the Pdcarbon catalyst with satisfactory results.

关 键 词：SDS 分光光度法 偶氮染料 钯 

分 类 号：O614.824[理学—无机化学]