Direct determination of micro aluminum in vanadium pentoxide by sensitivity-enhancing phenylfluorone spectrophotometry
YI Jing1, YAN Wen-bin*1, XU Hui1, HE Xin-bo1,2, GAO Feng1, ZHANG Chuan-bao1
1. School of Chemistry and Chemical Engineer,Jishou University,Jishou 416000, China; 2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Abstract：Trace aluminum in vanadium pentoxide was directly determined by phenylfluorone spectrophotometry without separation of matrix. The determination conditions, the sensitivity-enhancing of surfactant, the interference of iron and matrix vanadium in the determination of aluminum and the elimination method were investigated. The results showed that, the sensitivity-enhancing effect of color reaction was best when nonionic surfactant Tween-80 was used as the sensitizer. The interference of iron in vanadium pentoxide in the determination of aluminum could be eliminated using sodium tartrate. The absorbance of coloring system showed linearity to the concentration of vanadium, thus the interference of matrix vanadium was corrected by plane simulation equation. The calculation values of aluminum after correction were consistent with the theoretical values. The relative deviation was within ±2%, indicating that this method was feasible. The proposed method was applied to the analysis of actual sample. The found results of aluminum were consistent with those obtained by national standard method. The principle and calculation of this method were relatively simple. it was not only applicable for laboratory, but also applicable for industrial process analysis.
易静,颜文斌,徐辉,何新波,高峰,张传宝. 增敏苯基荧光酮光度法直接测定五氧化二钒中微量铝[J]. 冶金分析, 2013, 33(8): 33-37.
YI Jing, YAN Wen-bin, XU Hui, HE Xin-bo, GAO Feng, ZHANG Chuan-bao . Direct determination of micro aluminum in vanadium pentoxide by sensitivity-enhancing phenylfluorone spectrophotometry. , 2013, 33(8): 33-37.
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