摘要
在聚乙烯醇 (PVA )存在下 ,钌与钼酸盐和乙基罗丹明B(ERB)形成有色离子缔合物 .最佳反应条件为[HClO4 ]=1.2mol·L-1,[MoO2 -4 ]=6 .8× 10 -4 mol·L-1,[ERB]=3.2× 10 -5mol·L-1,w(PVA ) =0 .0 8% .缔合物的最大吸收位于 5 75nm ,表观摩尔吸光系数ε =2 .32× 10 6L·mol-1·cm-1.钌量在 0～ 2 4μg·L-1范围内服从比耳定律 ,体系至少稳定 2 4h ,检测限 0 .76 μg·L-1(n =12 ) .缔合物的组成比为ERB∶RuMo =3∶1.考察了 41种共存离子的影响 ,仅Si(Ⅳ ) ,Ge(Ⅳ ) ,Os(Ⅷ ) ,Au(Ⅲ )有干扰 .本法已用于某些岩矿和冶金产品中钌的测定 ,结果满意 .
Ruthenium with molybdate and ethylrhodamine B to form ionassociation complex in the presence of polyvinyl alcohol(PVA).The optimum conditions are [HClO 4]=1.2?mol·L -1 ,[MoO 2- 4]=6.8×10 -4 ?mol·L -1 ,[ERB]=3.2×10 -5 ?mol·L -1 and 0.08% PVA.The maximum absorption of the ion association complex is at 575?nm.Its apparent molar absorptive coefficient is 2.32×10 6 L·mol -1 ·cm -1 ,and it is stable for at least 24?h.Beer's law is obeyed in the range of 0～24?μg·L -1 for ruthenium.The limit of detection is 0.76?μg·L -1 ( n =12).The molar ratio of the main components in the ion association was found to be ERB∶RuMo=3∶1.Tolerance limits for 41 various ions were tested.Large amounts of other common metals were tolerated.The method was used for determination of ruthenium in some ores and metallurgical products with satisfactory results.
出处
《云南大学学报（自然科学版）》
CAS
CSCD
2000年第2期134-136,共3页
Journal of Yunnan University(Natural Sciences Edition)
