【摘要】 合成了新试剂二安替比林对乙氧基苯基甲烷,并研究了与V（Ⅴ）的显色反应。在磷酸介质中和Mn（Ⅱ）-乳化剂OP的作用下,显色反应的产物为橙黄色,ε为2.90×10⁶,λ_max=450nm,测定V（Ⅴ）的线性范围为4～32μg·L^-1。用于中草药中微量V（Ⅴ）的测定,结果满意。更多还原

【Abstract】 The synthesis of the chromagenic reagent diantipyryl（-p-ethoxy-）phenyl methane （DA-p-EM） is reported in this paper. In the presence of Mn（ I ） ion and OP, DA-p-EM reacts with vanadium（ V ） to form an orange yellow complex with its λ_max at 450nm and an molar absorptivity of 2. 9×10⁶L ·mol^-1-1 ·cm^-1. Beer’s law holds in the range of 4³2μg ·L^-1 of vanadium. The proposed method has been applied to the determination of vanadium in Chinese herbs with satisfactory results.更多还原