容量法测定氧化钒中的各种价态钒  

Volumetric Determination of the Valence States of Vanadium in Vanadium Oxide

作　　者：徐本平[1] 易桂华[1] 钟华[1] 张爱萍[1] 徐亚筠[1] 庞万里[1] 

机构地区：[1]攀枝花钢铁究院检测中心,攀枝花617000

出　　处：《分析化学》2002年第11期1322-1324,共3页Chinese Journal of Analytical Chemistry

摘　　要：用NaOH溶液处理样品 ,分离V 然后以Fe 滴定测定之。定量加入过量的V 到上述残渣中并用H2 SO4溶解 ,用Fe 滴定 ,计算出V 、V 的含量。V 的测定是通过从总钒量中扣除V 、V 、V 的含量得到。V 、V 和V 的回收率均大于 96% ,其 8次测定结果的相对标准偏差分别为 :9.8%、0 .4 %、1 .2 % ;本法快速、简便 。Vanadium oxide sample was treated by NaOH solution to separate V(V), the V(V) separated from the sample was titrated by Fe(II). Then a quantification of V(V) was added in the residue for oxidizing the V(II) and V(III), and the mixture was dissolved by H2SO4 and titrated by Fe(II), the content of V(II), V(III) can be calculated. The V(IV) was obtained by reducing the content of V(II),V(III) V(V) in the total vanadium. The recovery of V(II),V(III),V(V) was > 96%; The relative standard deviation of V(II), V(III),V(V) was 9.8%, 0.4%, 1.2% respectively. The method is simple and fast. It has been applied to the determination of valence states of vanadium in the vanadic oxide sample with satisfactory results.

关 键 词：测定 氧化钒 钒 价态分析 容量法 

分 类 号：O655.2[理学—分析化学]