Fe(Ⅲ)-二苯胺磺酸钠-过氧化氢体系测微量铁

STUDY ON THE DETERMINATION OF TRACE IRON BY THE REACTION SYSTEM OF Fe( I , Ⅲ)-DIPHENYLAMINE SULFONATE-H2O2

在Fe(Ⅲ)-二苯胺磺酸钠-过氧化氢反应体系中,引入不同酸度的乙酸钠盐酸缓冲液作为反应介质,探讨了pH2.61和pH4.30条件下测定铁离子的试验条件与方法特性.反应介质的酸度是控制该体系完全反应的基本条件,适当选择反应介质的酸度,既可保持本体系足够的灵敏度,又易控制反应条件.

It is found that the use of acetate buffer medium makes the catalytic photometric determination of traces iron by the reaction system of Fe( I , Ⅲ)-diphenylamine sulfonate-H_2O_2 easier to control while still keeping a sufficiently high sensitivity. The reaction may be carried out either at pH 2. 6 or at pH 4. 3.