CAJ | 학술논문

在硫酸-磷酸介质中,未经分离除去高浓度的Fe(Ⅲ),以二苯碳酰二肼作显色剂,与Cr(Ⅵ)形成有色配合物,在波长540nm处有最大吸收峰,显色程度与Cr(Ⅵ)含量成正比,Cr(Ⅵ)含量在0~50μg·(50mL)-1范围内呈良好的线性关系,摩尔吸光系数为4.0×105L·mol-1·cm-1.将方法应用于工业品硝酸铁中微量铬的测定,相对标准偏差为4.06%(n=6),加标回收率在91.5%~105.2%之间.
재류산-린산개질중,미경분리제거고농도적Fe(Ⅲ),이이분탄선이정작현색제,여Cr(Ⅵ)형성유색배합물,재파장540nm처유최대흡수봉,현색정도여Cr(Ⅵ)함량성정비,Cr(Ⅵ)함량재0~50μg·(50mL)-1범위내정량호적선성관계,마이흡광계수위4.0×105L·mol-1·cm-1.장방법응용우공업품초산철중미량락적측정,상대표준편차위4.06%(n=6),가표회수솔재91.5%~105.2%지간.
@@@@In sulfuric acid and phosphoric acid medium, after removal of high concentration of Fe ( Ⅲ ) without separation, diphenylcarbazide formed a colored complex with Cr( Ⅵ ) and it had a maximum absorption peak at wavelength of 540nm. The color degree was directly proportional to content of Cr ( Ⅵ ) and the content of Cr ( Ⅵ ) showed a good linear relationship between 0~50 μg/50mL. Molar absorption coefficient was 4.0×105L · mol-1 · cm-1. The method was applied to determine trace chromium in industrial ferric nitrate and the relative standard deviation was 4.06% (n=6), the recovery rate was 91.5%~105.2%.