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合成了新试剂二安替比林邻乙氧基苯基甲烷（ＤＡｏＥＭ），研究了它和Ｖ（Ⅴ）的显色反应。在Ｈ３ＰＯ４介质中，Ｍｎ（Ⅱ）和吐温２０协同作用下，ＤＡｏＥＭ和Ｖ（Ⅴ）生成橙色产物，λｍａｘ＝４８０ｎｍ，ε＝１．４×１０６Ｌ·ｍｏｌ－１·ｃｍ－１，Ｖ（Ⅴ）质量浓度在４～６０μｇ／Ｌ符合比尔定律。用于钢样和中草药中Ｖ（Ⅴ）的测定，结果与原子吸收法结果一致，５次测定结果的ＲＳＤ在１．８％～３．１％。
The new reagent diatopin - 2 - o - ethoxyphenylmethane (DAoEM) was synthesized and its color reaction with V (V) was studied. In H3PO4 media, DAoEM and V (V) produced orange products with the maxima of λ = 480nm and ε = 1.4 × 106L · mol-1 · cm-1 under the synergistic effect of Mn (Ⅱ) and Tween- Ⅴ) The concentration of 4 ~ 60μg / L is in accordance with Bill’s law. It was used for the determination of V (Ⅴ) in steel samples and Chinese herbal medicine. The results were in good agreement with the results of atomic absorption spectrometry. The RSDs of the five determinations were between 1.8% and 3.1%.