采用红外光谱鉴别天然胶乳掺假的分析与处理

在天然胶乳中按不同比例掺入木薯粉或面粉，制备掺假天然胶乳，采用傅里叶转换红外光谱进行表征和分析。 结果表明：在天然胶乳中掺入木薯粉或面粉，红外光谱在3 500～4 000 cm-1波段出现指纹区，掺入量越高，指纹区的波动幅度越大；在木薯粉或面粉的特征谱带，随着掺入量的增大，吸收强度增强。

Analysis and processing of identifying adulterated natural latex with infrared spectroscopy

In different proportions of dry rubber of natural latex, prepared samples by mixing tapioca or flour into natural latex. Characterized structures of the above different samples by Fourier transform infrared spectroscopy (FTIR), and made a comparison analysis. The results showed that, under test conditions: after latex was mixed with different dosage of tapioca or flour, there were fingerprint regions of infrared spectra in 3500-4000 cm-1 band, and the higher of the doping amount, the volatility of the fingerprint regions were higher; with the increase of doping amount, absorption intensity enhanced in infrared feature bands of tapioca or flour.