分光光度法同时测定硅石中的铁和铝

Simultaneous determination of aluminum and iron in silica samples by spectrophotometry

在邻二氮菲(Phen)、铬天青S(CAS)和十四烷基二甲基苄基氯化铵(TDMBA)的共同存在下,于pH 5～6的酸性介质中,铁、铝分别生成Fe-Phen和Al-CAS-TDMBA络合物,用同一份试液,在波长510 nm测定铁,在625 nm测定铝,两种络合物互不干扰。用该法可同时测定硅石中的铁和铝。

In the presence of the o-phenanthroline（Phen）,Chromazurol S（CAS） and tetradecyl methyl benzyl ammonium chloride（TDMBA）,iron and aluminum generate Fe-Phen and Al-CAS-TDMBA complexes,respectively in the acid medium（pH = 5~6）.In the same test solution,iron is determined at the wavelength of 510 nm and aluminum is measured at the wavelength of 625 nm,but the two types of complexes do not interfere with each other.The method has been used for simultaneous determination of iron and aluminum in silica samples with rapidness and convenience.