摘要
合成并用红外光谱和元素分析鉴定了吡啶偶氮氨类试剂：4-（5-硝基-2-吡啶偶氮）-1,3-二氨基苯（5-NO2-PADAB）,研究了该试剂与钯的显色反应。在0.36-2.04 mol/L HClO4介质中,钯与试剂形成1∶1的蓝色配合物,其最大吸收波长位于586 nm处。表观摩尔吸光系数为1.04×10^5L.mol-1.cm^-1,钯的质量浓度在0-1.2μg/mL范围内符合比尔定律。方法是目前测定钯的高灵敏和高选择性体系之一。
A new reagent 4- （5- nitro-2-pyridylazo） - 1,3-diaminobenzene （5- NO2 -PADAB） was synthesized and characterized by IR and elemental analysis. The color reaction of 5-NO2-PADAB with Palladium（ Ⅱ ） was studied. Pd reacts with 5-NO2-PADAB to form a blue complex with molor ratio of 1 ： 1 in a medium of 0.36 - 2.04 mol/L perchloric acid solution. Its apparent molar absorptivity is 1.04× 10^5 L·mol^-1 ·cm^-1 at the maximum absorption of 586 nm. Beer＇s law was obeyed in the concentration range of 0 - 1.2 μg/mL for Pd. The method has high sensitivity and selectivity. It has been applied to the determination of trace amounts of Pd in catalysts with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2008年第10期99-101,共3页
Chinese Journal of Analysis Laboratory
