Classification of Pericarpium Citri Reticulatae (Chenpi) age using surface-enhanced Raman spectroscopy. (15th May 2023)

• Record Type: Journal Article
• Authors: Dai, Guoyu; Wu, Longxiang; Zhao, Jianhua; Guan, Qiunong; Zeng, Haishan; Zong, Ming; Fu, Manqin; Du, Caigan
• Is Part Of: Food chemistry. Volume 408(2023)
• Publication Date: 2023-05-15
• Subjects: Pericarpium Citri Reticulatae -- Chenpi -- Raman spectroscopy -- Chemical fingerprinting -- Storage age; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2022.135210
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Pericarpium Citri Reticulatae (Chenpi) is commonly used with tea, food, alcoholic beverage and herbal medicine, and its quality is determined by its storage age. Raman spectroscopy is a laser technology for molecular fingerprinting, and the Raman spectra of Chenpi with enhancement of silver nanoparticles were characterized by the major peaks at 600, 730, 990, 1370, 1607, and 1742 cm −1 . Using a Raman spectrometer we can predict the storage age of Chenpi up to 30 years old with over 90 % accuracy from its Raman spectra. Abstract: Pericarpium Citri Reticulatae (PCR) is used in food and medical herbal formula, and its quality is determined by its age. Raman spectroscopy is a laser technology for molecular fingerprinting. The feasibility of using surface-enhanced Raman spectroscopy (SERS) to determine the PCR age was investigated. The Raman peaks were acquired using a Raman spectrometer with a 785 nm diode laser and were analyzed using principal component analysis (PCA) followed by linear discriminant analysis (PCA–LDA). There were six major peaks at 600, 730, 990, 1370, 1607, and 1742 cm −1 in the SERS spectra, and their intensity, especially the peak at 1607 cm −1, was inversely correlated with the PCR age. The different ages of PCR could be correctly classified with over 90 % accuracy by using PCA-LDA based on the SERS spectra. In conclusion, a Raman spectrometer may be used as a novel method to identify the age of PCR products.