在表面活性剂存在下应用碱性染料-杂多酸缔合物于微量磷的测定有许多文献报道。文献进行了多种碱性染料的筛选,认为孔雀绿最好,并应用于河水中痕量磷的测定,我们研究了非离子表面活性剂,钼磷杂多酸和碱性染料孔雀绿在硫酸介质中形成离子缔合物的条件,并发现当适量的柠檬酸存在下可允许较大量的钨的存在,为三氧化钨及以钨为基体的样品中直接进行痕量磷的测定提供了可能性。三氧化钨中磷的测定多用铍作载体沉淀磷与基体分离,再以正丁醇-氯仿萃取,钼蓝光度法测定,此法手续烦琐,且铍污染环境。而不经分离基体钨直接测定三氧化钨中的磷还未见文献报道。我们用柠檬 The use of basic dyes in the presence of surfactants-heteropolyacid complex in the determination of trace amounts of phosphorus has been reported in the literature. Literature for a variety of basic dyes screening, that the best malachite green, and applied to the determination of trace amounts of phosphorus in the river, we studied the non-ionic surfactant, molybdenum phosphorus heteropoly acid and basic dye malachite green in sulfuric acid The conditions for the formation of ion-association species in the medium and the discovery that a larger amount of tungsten is allowed to exist in the presence of the appropriate amount of citric acid provide the possibility of direct trace phosphorus determination in tungsten trioxide and tungsten-based samples Sex. Determination of phosphorus in tungsten trioxide use beryllium as the carrier to precipitate phosphorus and matrix separation, and then n-butanol - chloroform extraction, molybdenum blue photometry method, this method is cumbersome procedures, and beryllium pollution of the environment. However, the direct determination of phosphorus in tungsten trioxide without separating the matrix tungsten has not been reported in the literature. We use lemon