Raman and UV spectra of radix astragali

A. Test Subjects The test subject is radix astragali (astragalus root)[25]. Chinese name: 黄芪(huang-qi). Radix astragali is a widely used medicinal herb in traditional Chinese medicine (TCM). It is often used to treat diabetes and cardiovascular diseases. The radix astragali samples are provided by a TCM pharmaceutical manufacturer. Radix astragalus is the main ingredient in one of their patent drugs. The radix astragali samples come from four different provinces, i.e., Inner Mongolia (north China), Sichuan (southwest China), Shanxi (northwest China), and Gansu (northwest China). Herbs from different regions could have slightly different medicinal effectiveness, due to different cultivation conditions, climate, and environment. B. Instrument Instruments: Both Raman and UV are used to profile the radix astragali samples. The Raman spectrometer used in this study is ProttezRaman-D3, manufactured by Enwave Optronics, US. The ultraviolet-visible absorption spectrum is generated by a T6 ultraviolet-visible spectrometer, manufactured by Purkinje General Instrument, China. Procedures: Each radix astragali sample is first processed in a high-speed grinder for 10 min at 25,000 rpm (round per minute). Every 3g of the ground powder is solved in 30 mL ethanol solution. Then, the mixture is stirred for 1 h at 100℃ with reflux. Let the mixture cool down and then filter it. Finally, test with Raman and UV spectrometers. The parameters for Raman are as follows. Laser wavelength: 785 nm. Laser power: 450mW. Exposure time: 5s. C. Dataset 160 radix astragali samples are tested. Each category (province) has 40 samples. The Raman and UV spectra are organized into two CSV (comma-separated value) files. Each row is one sample. The first column is the Y label (0-Inner Mongolia, 1-Sichuan, 2-Shanxi, 3-Gansu). The rest of the columns are Raman wavenumbers or UV wavelengths. Data file summary: 7044.txt - Raman X meaning: Raman shift /wavenumber X range: 100 ~ 4278 cm-1 Resolution: 2cm-1 7143.txt - UV X meaning: wave length X range: 200 ~ 800 nm Resolution: 1 nmA. 测试样本 本次测试的样本为黄芪（radix astragali，astragalus root），中文名称为黄芪（huáng-qí）。黄芪是中医药（Traditional Chinese Medicine，TCM）中应用广泛的药用草本，常被用于治疗糖尿病与心血管疾病。 该黄芪样本由一家中药制药企业提供，是其一款专利药物的核心成分。样本采自中国四个不同省份：内蒙古（中国北方）、四川（中国西南）、山西（中国西北）以及甘肃（中国西北）。由于种植条件、气候与环境存在差异，不同产地的药材药效可能存在细微区别。 B. 实验仪器 本研究采用拉曼（Raman）光谱与紫外（UV）光谱对黄芪样本进行表征。所用拉曼光谱仪为美国Enwave Optronics公司生产的ProttezRaman-D3型；紫外-可见吸收光谱则由中国Purkinje General Instrument公司生产的T6型紫外-可见分光光度计采集。 实验流程：首先将每份黄芪样本以25000转/分钟的高速研磨机研磨10分钟。称取3g研磨后的粉末溶于30mL乙醇溶液中，将混合液在100℃下回流搅拌1小时。待混合液冷却后进行过滤，最后使用拉曼与紫外光谱仪完成测试。拉曼测试参数如下：激光波长785nm，激光功率450mW，曝光时间5s。 C. 数据集 本次共测试160份黄芪样本，每个省份类别对应40份样本。 拉曼光谱与紫外光谱数据分别整理为两个CSV（comma-separated value，逗号分隔值）文件，每行代表一个样本。第一列为标签Y（0代表内蒙古，1代表四川，2代表山西，3代表甘肃），其余列分别为拉曼波数或紫外波长。数据文件说明如下： 7044.txt 为拉曼光谱数据：X轴含义为拉曼位移/波数，范围为100~4278 cm⁻¹，分辨率为2 cm⁻¹。 7143.txt 为紫外光谱数据：X轴含义为波长，范围为200~800 nm，分辨率为1 nm。