【摘要】 <正> 依来铬蓝黑B是一种金属指示剂,在pH1.95～12.20的Britton-Robinson缓冲溶液中产生一良好的还原波。在氨性缓冲溶液中,当溶液的pH在9.5～11.3时,依来铬蓝黑B也产生一明晰波。该波高与汞柱高的平方根成正比;波高随pH的变化不大;当pH为10.9时,E_1/2=-0.45V（相对汞池阳极）;E_1/2随pH的增加而负移,?E_1/2/?pH=-61mV,平均极限电流与滴下时间的对数解析斜率?lg?/?lgt=0.17;经循环伏安法更多还原

【Abstract】 The polarographic behaviour of Eriochrome Biue Black B and its complex with magne-sium ion was investigated. The experimental data showed that the complex of magn-sium ion with the dye exists in ratio 1: 1.The apparent stability constants under diffe-rent experimental conditions were calculated from the heights of polarographie waves.更多还原