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在聚乙烯醇存在下，银与２，４－二甲氧基苯基荧光酮（ＤＭＰＦ）及邻菲口罗啉形成离子缔合型异配位体配合物使ＤＭＰＦ的荧光熄灭。在ｐＨ为６．５～８．０的醋酸－醋酸铵或氨水－醋酸铵介质中，λｅｘ＝４００ｎｍ，λｅｍ＝５５０ｎｍ，体系的相对荧光强度最大，线性范围为：０～６００μｇ／Ｌ，检出限为０．０１１μｇ／ｍＬ。方法已用于阳极泥中银的测定，结果满意。
In the presence of polyvinyl alcohol, silver forms an ion-association heteroleptic complex with 2,4-dimethoxyphenylfluorone (DMPF) and o-phenanthroline to quench the fluorescence of DMPF. The relative fluorescence intensity of the system was the highest at λex = 400nm and λem = 550nm in acetic acid-ammonium acetate or ammonium acetate-ammonium acetate solution with the pH of 6.5 ~ 8.0. The linear range was from 0 to 600μg / L, Limit is 0.011 μg / mL. The method has been applied to the determination of silver in anode mud with satisfactory results.