Abstract：The redox titration was the common method for the determination of vanadium,in which, N-phenyl-o-aminobenzoic acid was used as indicator,and the content of vanadium was titrated using ammonium ferrous sulfate(FAS) standard solution. In national standard and industrial standard, ferrous was calibrated mainly with reference materials or standard solutions such as spectroscopically pure vanadium pentoxide, ammonium meta-vanadate, potassium dichromate and potassium permanganate. Based on the difference study of FAS calibration, its influence on the determination of vanadium was investigated. It was found that, when ammonium meta-vanadate or vanadium pentoxide was used as reference material, the calibration of solution and the determination of vanadium content in vanadium compounds had the same chemical reaction. The error caused by the color change potential of indicator and the difference of stoichiometric potential would be partially offset and decreased. Compared with ammonium meta-vanadate (or vanadium pentoxide), the calibration results of FAS were lower when potassium permanganate and potassium dichromate were used, so the determination results of vanadium were also lower.
曾繁武，宋明明，陈彦博，孙铁军，丁文英，姜雪莲，贾威铭，仇进国. 不同基准物质及标准滴定溶液标定亚铁时对测定钒含量的影响[J]. 冶金分析, 2013, 33(10): 69-72.
ZENG Fan-wu, SONG Ming-ming, CHEN Yan-bo, SUN Tie-jun DING Wen-ying,JIANG Xue-lian,JIA Wei-ming,QIU Jin-guo. Effect of various reference materials and standard titration solution on the determination of vanadium content during the calibration of ferrous. , 2013, 33(10): 69-72.
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