摘要
报道了维生素B2在酸性溶液中的极谱氧化波及其应用．在0．12mol／L的硫酸溶液中，维生素B2在-0．04V（vs．SCE）处产生一个灵敏的吸附性氧化峰，其二阶导数波峰尖锐、对称，波高与0．025×10^-6～9．0×10^-6g／mL范围内的维生素B2呈线性关系，相关系数为0．997，检出限达0．020×10^-6g／mL对于5．0×10^-6g／mL的维生素B2平行进行11次测试，RSD为1．10％．极谱波的波高在室温下可以稳定8h．讨论了测定中干扰物质中的影响及机理包括循环伏安图，温度系数，表面活性剂的影响和电毛细管曲线．结果降低了检测下限．
Riboflavin produces a sensitive oxidation wave at -0. 04 V （vs. SCE） in sulfuric acid. The second derivative peak is sharp and symmetrical. The wave height shows a good linear relationship to the concentration of Vitamin Bz in the range of 0. 025 × 10^-6 -9.0× 10^-6 g/mL, the correlation coefficient is 0. 997, and the detection limit is 0. 020× 10^-6 g/mL. The relative standard deviation for 11 independent determination of 5.0× 10^-6 g/mL riboflavin is 1. 10 0%, The polarographic wave was stable in 8 h. The effects of interfering materials and the mechanism including cyclic voltammograms, temperature coefficient and electrocapillary curves were discussed. Compared with literatures data, the lower limit was reduced.
出处
《中南民族大学学报（自然科学版）》
CAS
2008年第2期1-3,共3页
Journal of South-Central University for Nationalities：Natural Science Edition
基金
湖北省自然科学基金资助项目(2005ABA001)
中南民族大学自然科学基金重点资助项目(YZY06001)
关键词
维生素B2
单扫描极谱法
氧化波
Riboflavin
single sweep polarography
oxidation wave
