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在０．２ｍｏｌ／ＬＨ２ＳＯ４－１０％乙醇介质中及紫外光照射条件下磷钼杂多酸光还原为磷钼蓝（λｍａｘ＝７８０ｎｍ）。据此建立了一个测定０．０５～２．０μｇ／ｍＬ磷的光化学分析新方法，并用于试样分析。探讨了光化学反应机理。
The phosphomolybdic heteropolyacid was photo-reduced to phosphomolybdic blue (λmax = 780nm) under the condition of 0.2mol / LH 2 SO 4 -10% ethanol and UV irradiation. A new photochemical method for the determination of phosphorus from 0.05 to 2.0 μg / mL was established and used for sample analysis. The photochemical reaction mechanism was discussed.