1-(2-吡啶偶氮)-2-萘酚对铈(Ⅲ)的萃取

1-（2-吡啶偶氮）-2-萘酚（简称PAN）是一种螯合萃取剂,常用于金属的分离和分析.PAN 对镧系元素的萃取,通常认为属于阳离子交换过程,即Ln3+水+（3+n）HL有（?）LnL3（HL）n有+3H+水（1）反应的平衡常数可表示为K=[LnL3（HL）n]有[H+]3水/[Ln3+]水[HL]3+n有=DLn [H+]3水/[HL]3+n有（2）在HClO4介质中,LN3+的络合程度可忽略不计,而且当其浓度很低时。

STUDY OF PHOTODISSOCIATION RATE OF NITROSYL RUTHENIUM NITRATES

Ruthenium belongs to the group of transition metals and shows one of the largest ranges of valence states. Its chemical behaviour is very complicated. In nitric acid media ruthenium mainly presents as a stable species of nitrosyl-ruthenium ion, RuNO2+,which can form a large number of complexes with many ligands, such as NO3-, NO2-,OH- and H2O,but most of these complexes are aquo-trinite complexes, namely RuNo-