Establishment of Qualitative and Quantitative of Fluorescent Whitening Agents in plastics

The maximum excitation wavelength and emission wavelength of fluorescent whitening agents in plastics were measured and qualitative method was built with fluorescent method.In the test,optional conditions for quantitative determination of fluorescent whitening agent OB were as following:The excitation wavelength was 369 nm,emission wavelength was 435 nm.The fluorescence positively linear correlated with concentration of OB when the concentration was 0.12~6.0 mg/L.These results showed that fluorescent method was simple and efficient method to qualitative and quantitative determination of fluorescent whitening agents in plastics.