【摘要】 本研究利用傅里叶变换红外光谱（Fourier Transform Infrared Spectroscopy;FT-IR）和二阶导数红外光谱（Second Derivative Spectroscopy;SD-IR）技术对不同产地的陈皮进行差异化分析。FT-IR结果表明,所有样品的伸缩振动在3 400～3 429cm^-1（—OH）、2 925 cm^-1（C—H）、1743 cm^-1（C=0）等区域存在共有吸收峰,表明其含羟基化合物、烷基链及酯类/酮类成分（如橙皮苷衍生物）。其中S5、S12和S13分别在3 427～3 429 cm^-1、1 242 cm^-1及536 cm^-1处具有特征峰,可实现初步区分。SD-IR通过放大峰强差异和低波数区独有峰,如S6的1 606 cm^-1、S8的816 cm^-1;结合峰强差异,如S2在1 647 cm^-1的高峰强和S1在2 925 cm^-1的强峰,实现了其余产地的精准鉴别。该研究证实,FT-IR结合SD-IR可为陈皮产地溯源及质量控制提供高效、无损的分析手段。更多还原

【Abstract】 This study used Fourier Transform Infrared Spectroscopy（FT-IR） and Second Derivative Infrared Spectroscopy（SD-IR） to differentiate citrus peels（Chenpi） from various geographical origins.The FT-IR results revealed common absorption peaks of stretching vibrations across all samples at 3 400～3 429 cm^-1（—OH）,2 925 cm^-1（C—H）,and 1 743 cm^-1（C=O）,indicating the presence of hydroxyl compounds,alkyl chains,and ester/ketone components（e.g.,hesperidin derivatives）.Notably,S5,S12,and S13 distinctive fingerprint regions with characteristic peaks at 3 427～3 429 cm^-1,1 242 cm^-1,and 536 cm^-1,respectively,enabling preliminary differentiation from other samples.The SD-IR technique amplified peak intensity variations and identified unique low-wavenumber peaks(e.g.,1 606 cm^-1 for S6 and 816 cm^-1 for S8),while leveraging differential peak intensities(e.g.,S2’s strong peak at 1 647 cm^-1 and S1’s prominent peak at 2 925 cm^-1) to achieve precise discrimination among remaining samples.This work demonstrates that the combination of FT-IR and SD-IR provides an efficient,non-destructive analytical approach for origin tracing and quality control of ChenPi.更多还原