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目的:研究硫磺熏蒸前后党参红外光谱的特征变化规律,为党参药材的质量控制提供鉴别依据。方法:对党参药材以不同比例的硫磺进行熏蒸,采用傅里叶变换红外光谱法对熏蒸前后的党参药材、党参醇提物和党参水提物进行红外图谱及二阶导数图谱分析。结果:对于党参药材、党参醇提物和党参水提物3种分析对象来说,其各自的未熏党参与硫磺熏蒸党参在红外光谱上的差别并不明显,而通过具有高分辨力的二阶导数光谱分析后,可得到明显的差别变化。二阶导数光谱显示,对于党参药材,硫磺熏蒸前后的吸收峰在1 500~1 600 cm-1峰强变化比较明显,而对于党参醇提物和水提物来说,在1 500~1 600,1 715 cm-1处峰强变化明显,且随熏蒸党参硫磺用量的不同峰强有各自的变化规律。结论:利用硫磺熏蒸前后党参红外光谱的变化规律,可快速、高效地鉴别党参是否经过硫磺熏蒸处理,为党参药材的质量控制提供鉴别依据。
Objective: To study the characteristics of the changes of the infrared spectrum of Codonopsis before and after sulfur fumigation, and to provide the basis for the quality control of Codonopsis pilosula. Methods: Radix Codonopsis pilosula was treated with different proportions of sulfur, and Fourier transform infrared spectroscopy (FTIR) was used to analyze the Codonopsis pilosula before and after the fumigation. Results: For the three kinds of analysis objects, such as Codonopsis pilosula, Codonopsis pilosula extract and Codonopsis pilosulae, the differences of their non-smoked party participating in sulfur fumigation Codonopsis in the infrared spectrum were not obvious, After the derivative of spectral analysis, significant differences can be obtained. The second-order derivative spectra showed that the peaks at 1 500 ~ 1 600 cm-1 before and after sulfur fumigation varied significantly for the Codonopsis pilosula, while for the ethanol extract and water extract of Codonopsis pilosula, , The peak intensity at 1 715 cm-1 changed obviously, and the variation of the peak intensity with sulfur consumption of Codonopsis pilosula had its own variation. Conclusion: The change rule of Codonopsis before and after sulfur fumigation can quickly and efficiently identify whether Codonopsis pilosula fumigated through sulfur fumigation, to provide the identification basis for the quality control of Codonopsis pilosula.