| 基于电子鼻和HS-GC-MS联用技术对当归及其混伪品气味差异分析 |
| 投稿时间：2024-09-26 修订日期：2024-11-10 点此下载全文
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| 中文摘要:目的：基于电子鼻和顶空-气质联用（HS-GC-MS）联用技术，探究当归及其3种混伪品的气味差异及其物质基础。 方法：以当归、东当归、欧当归及独活为研究对象，利用电子鼻和HS-GC-MS技术分别从总体气味和具体挥发性成分两个方面进行分析，通过化学计量法筛选品种间的差异性成分，通过相关性分析探寻传感器响应值与差异性成分间的相关性规律。 结果：当归及其混伪品间整体气味、挥发性成分种类及含量明显不同。电子鼻的检测结果经主成分分析（PCA）后能较好区分当归及其混伪品；采用HS-GC-MS共鉴别出烯烃类、酯类、芳香类、醛类等58个成分，且不同品种样品之间化合物相对质量分数差异明显。以变量重要性投影（VIP）＞1为标准筛选出的23个差异性挥发成分与电子鼻传感器做Person相关性分析，结果表明差异性气味产生的物质基础主要为P-伞花烃、庚醛、糠醛、莰烯、水芹烯等。 结论：电子鼻技术结合化学计量学可区分当归及其混伪品，结合HS-GC-MS技术揭示了当归及其混伪品的气味特征及差异，可为当归的真伪鉴别提供新的思路和方法。 |
| 中文关键词:当归 混伪品 电子鼻 HS-GC-MS 挥发性成分 |
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| Odor Difference Analysis of Angelicae Sinensis Radix and its Adulterants Based on Electronic Nose and HS-GC-MS Technology |
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| Abstract:Objective：To investigate the odor disparity difference of Angelicae Sinensis Radix and its three adulterants and the material basis of odor formation using Electronic Nose and headspace gas chromatography-mass spectrometry (HS-GC-MS) Technology. Method: Taking Angelicae Sinensis Radix , Angelica acutiloba Kitagawa，Levisticum officinale Koch，and Angelicae Pubescentis Radix as the research objects, the overall odor and specific volatile components respectively by using the electronic nose and HS-GC-MS technology. Chemometrics was used to select species-specific components, and correlation analysis was used to explore the correlation between sensor response values and species-specific components. Result：There were significant differences in the overall odor, the types and contents of volatile components between Angelicae Sinensis Radix and its adulterants. The principal component analysis (PCA) of the detection results of the electronic nose could distinguish the samples of Angelicae Sinensis Radix and its adulterants. A total of 58 components, such as olefins, esters, aromatics and aldehydes, were identified by HS-GC-MS, and the relative mass fractions of compounds among different varieties of samples were obviously different. The Person correlation analysis between 23 different volatile components screened by the variable importance projection (VIP) > 1 and the electronic nose sensor shows that C2 (m-Cymene)， C7 (Heptanal), C8 (Furfural), C17Camphene), and C18 (alpha-Fellandrene) constituted the primary material basis for the differing odors. Conclusion：Electronic nose technology combined with chemometrics can distinguish Angelicae Sinensis Radix and its adulterants, and the combination of HS-GC-MS technology reveals the odor characteristics and differences, which can provide new ideas and methods for the authenticity identification of Angelicae Sinensis Radix. |
| keywords:Angelicae Sinensis Radix adulterants electronic nose HS-GC-MS volatile componen |
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