摘要
在H3PO4介质中，抗坏血酸存在下，超痕量钒能灵敏地催化KBrO3氧化甲基绿褪色。研究了该催化褪色反应的最佳条件及动力学参数，建立了一种测定超痕量钒的新方法。该法的线性范围为0～1．00ng／mL，检出限为5．20×10^-12g／mL。方法可用于芹菜和小麦中钒的测定。
Abstract： A new spectrophotometric method for the determination of trace amount of Vanadium was developed. It is based on the catalytic effect of trace vanadium on the discoloring oxidation of methyl green by KBrO3 in the presence of Vc in the medium of H3 PO4 . The optimum conditions of the catalytic reation have been studied. The linear range of V（Ⅴ） is 0 - 1.00 ng/10 mL, and the detection limit is 5.20 × 10^-12 g/mL. The method has been used for the detemaination of trace Vanadium in celery and wheat with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2005年第10期40-43,共4页
Chinese Journal of Analysis Laboratory
关键词
钒
催化光度法
甲基绿
Vanadium
catalytic spectrophotometry
methyl green
