【摘要】 本文合成和鉴定了试剂4-甲基偶氮胂-TB,并对其测定稀土总量作了详细研究。用该试剂可不经分离直接测定球墨铸铁中的稀土,结果令人满意。更多还原

【Abstract】 The new reagent 4-methyiarsenazo-TB was synthesized and identified.Its color reaction with rare earth was studied spectrophotometrically.The absorbance of the method is 5.9×10⁴～9.5×10⁴.L.mol^-1·cm^-1,the method has good selectivity.In the phos- boric acid,Cu²⁺,Mg²⁺,Mn²⁺and Ca²⁺at mg levels do not interfer with the determina- tion of rare earth element.The proposed method was applied to the determination of rare earth in nodular cast iron without separation.The result was satisfactory.更多还原