三聚氰胺溶液的荧光光谱实验研究

对三聚氰胺溶液和含三聚氰胺的奶粉溶液在紫外光激励下产生的荧光光谱进行了实验研究.讨论了其产生机理和谱线特性,并对奶粉溶液和含三聚氰胺奶粉溶液的荧光光谱进行了纵坐标比值变换分析.结果表明,三聚氰胺溶液在波长为240 nm左右的紫外光激励下能产生较强的荧光,荧光峰分别位于350 nm和370 nm附近;在同一波长紫外光激励下,含三聚氰胺奶粉溶液与奶粉溶液的荧光光谱相比,荧光主峰位置由328 nm变为350 nm,其他荧光峰的位置基本保持不变,荧光相对强度在370 nm处最大.

Experimental Research on Fluorescence Spectra of Melamine Solution

The fluorescence spectra of melamine-water solution and milk powder-water solution mixed with melamine excited by UV-light were studied experimentally. The emission mechanism and the spectral characteristic were discussed, and the fluorescence spectra were analyzed and calculated by ordinate ratio transformation. The result shows that the melamine-water solution exhibits an obvious fluorescence peak nearby 350 nm and 370 nm with the optimal excitation wavelength of 240 nm. Compared with milk powder-water solution, the fluorescence peak location of milk powder-water solution mixed with melamine, excited by UV-light with same wavelength, changes from 328 nm to 350 nm. The other peak locations are basically changeless, and the relative fluorescence intensity of 370 nm is the maximum one.