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在002mol/LH2SO440%乙醇介质中及紫外光照射条件下,钼同多酸光还原生成钼多蓝(λmax=760nm);于相同条件,有PVA存在,钼多蓝和RDB反应,生成稳定的红紫色缔合物,最佳条件:在002mol/LH2SO4-20×10-5mol/LRDB-005%PVA-40%乙醇介质中及光照10min。钼浓度在10-7～10×10-5mol/L范围内与吸光度呈线性关系,据此建立了一个测定钢中微量钼的光化学分析新方法。
In 002mol / LH2SO440% ethanol medium and UV irradiation conditions, the molybdenum polyacid was light reduction of molybdenum blue (λmax = 760nm); under the same conditions, the presence of PVA, molybdenum and blue RDB reaction to generate a stable red Purple association materials, the best conditions: in 002mol / LH2SO4-20 × 10-5mol / LRDB-005% PVA-40% ethanol medium and light 10min. Molybdenum concentration in the range of 10-7 ~ 10 × 10-5mol / L and absorbance showed a linear relationship, thus establishing a new method for the determination of trace molybdenum in the photochemical photochemical analysis.