比色法连续测定磷酸中铁、铝的含量

摘要

Samples were reacted with 7-iodo-8-hydroxylquinoline-5-sulfonic acid in the medium of acid to form metal-orgnic liand compounds,which were measured with colorimetry in 365 nm and 590 nm respectirely to determin ferric and aluminium.The methoal was precise,accurate,simple,rapid and could be determined successively.%比色法连续测定磷酸中铁、铝的含量，是在一定酸度条件下，试液中的Fe3+和Al3+与试铁灵(又名7-碘-8-羟基喹啉-5-磺酸)反应，生成金属-有机配位体络合物。分别在365 nm和590 nm波长下进行比色，求得磷酸中铁、铝的含量。本法精密度和准确度较好，具有简便、快速、连续测定的优点。