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空气中多次甲基多苯基从异氰酸酯(PAPI)的测定目前尚无方法。我们根据PAPI的分子结构,具有多苯基和多异氰酸酯根(-N=C=O)的特点,由于多苯环双键的共轭作用,加之苯环上有发色基团(-N=C=O)的取代。
There are currently no methods for the determination of multiple methylpolyphenyl isocyanates (PAPI) in air. According to the molecular structure of PAPI, we have the characteristics of polyphenyl and polyisocyanate (-N = C = O). Due to the conjugation of the double bond of polyphenyl and the chromophore on the benzene ring (-N = C = O).