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报道了罗丹明乙二醛酰腙的合成及与三聚氰胺的反应。在pH 3.0的缓冲溶液中三聚氰胺对罗丹明乙二醛酰腙的荧光强度有增强作用,其增强程度与三聚氰胺的浓度成正比,据此建立了一种新的测定三聚氰胺含量的荧光分析法。该方法线性范围为0.5~10.0 mg/L,r=0.994,检出限为0.15 mg/L,样品测定的RSD为1.7%(n=7)。
The synthesis of rhodamine glyoxal hydrazone and its reaction with melamine were reported. In the pH 3.0 buffer solution, melamine could enhance the fluorescence intensity of rhodamine glyoxal hydrazone, and the degree of enhancement was proportional to the concentration of melamine. Therefore, a new fluorescence analysis method for the determination of melamine content was established. The linear range of this method was 0.5-10.0 mg / L with r = 0.994. The limit of detection was 0.15 mg / L. The RSD of the sample was 1.7% (n = 7).