镀铬泥渣中铬的原子吸收测定

DETERMINATION OF THE ATOMIC ABSORPTION OF CHROMIUM IN CLAY SLAGS OF PLATE CHROMIUM

在1%的硫酸介质中,以亚硫酸钠作还原剂及干扰抑制剂,以十二烷基硫酸钠为敏化剂,对镀铬泥渣中总铬进行火焰原子吸收测定。消除了大量铜、镍、铁、镁等共存元素的干扰。方法精密度≤±2%,回收率95-102%。方法稳定、准确,操作简便、快速。

A method of the determination of Cr in clay slags of plate Cr by air-acetylene flame AAS had been developed,Tests showed that,in 1% sulfuricacid medium,using sodium sulfite as reducer and sodium dodecyl sulfate asinterference-suppression agents,could dispel the interfereneial effects of a lotof Cu,Ni,Fe,Mg,etc,which commonly occur in samples.The percentage ofrecovery of Cr is 95 to 102%.The precision is≤±2%.This method is stable,accuratd ane rapid.