【摘要】 <正> 对溴偶氮胂〔2-(2-胂酸苯偶氮)-7-(4-溴苯偶氮)-1,8-二羟基萘-3,6-二磺酸〕是一种高灵敏的显色剂。本文研究了稀土-对溴偶氮胂-曲拉通X-100三元络合物的显色条件。试验证明,稀土-对溴偶氮胂形成的络合物在710nm波长处有最大吸收,该反应属于β型反应。采用双峰双波长光度法测定稀土总量的灵敏度(ε_双=2.45×10~5)比相同条件下的单波长光度法灵敏度(ε_单=1.98×10~5)提高1.24倍。采用PMBP萃淋树脂分离,简化了分离手更多还原

【Abstract】 The colour reaction of ternary complex rare earth-p-bromoarsenazo-triton X-100 was studied spectrophotometrically after extraction-chromatographic separation using PMBP-containing resin, The sensitivity of the complexes of rare earths is very near toε=2. 45×10~6. A new method was suggested for the determination of total amount of RE in water.更多还原