普洱茶(熟茶)发酵过程翻堆样的红外光谱分析

摘要

对普洱茶发酵过程翻堆样的红外图谱进行识别,并结合茶多酚的变化对吸收蜂进行分析.结果表明,红外图谱中1 240,1 150 cm -1附近的吸收峰相对强度与茶多酚含量相关,1 320,1 640cm-1附近吸收峰强度与多酚氧化产物含量相关；T1640/T1240,T1640/T1150,T1320/T1240,T1320/T1150透过率相对强度比反映了多酚及其氧化产物相对含量的变化趋势,可为普洱茶发酵程度的判断提供参考.%The IR spectra of pu-erh tea sample in the different stages of fermentation were identified, combined with analysis on absorption peak changes of tea polyphenols (TPs). It was showed that the relative intensity of absorption peak near the 1 240, 1 150 cm" , in the infrared spectrum, associated with the content of TPs, and the relative intensity of absorption peak near the 1 320, 1 640 cm-1 associated with the content of polyphenol oxidation products. The transmittance ratio on T1640/T1240, T1640/ T1150,T1320/T1240, T1320/T1150 reflected the trends of relative content of TPs and their oxidation products , which can provide a reference for the judgment of pu-erh tea fermentation .