摘要
目的实现化妆品中苯甲酸与山梨酸两种常见防腐剂的现场快速检测,提高检测效率和现场检测能力。方法使用便携式拉曼光谱仪,以银纳米粒子作为表面增强拉曼光谱(surface enhanced raman spectroscopy,SERS)的增强基底,检测化妆品中的苯甲酸和山梨酸钾。结果苯甲酸和山梨酸分别在1157 cm^(-1)和871 cm^(-1)处具有特征拉曼谱峰,同时进一步研究表明,苯甲酸和山梨酸的浓度与其特征拉曼谱峰强度线性相关,故可实现定量检测,用传统液相色谱法确证,定量结果一致。结论该SERS方法具有简单、快速、高效等优点,有望实现防腐剂的现场快速检测。
Objective:To achieve rapid on-site detection of benzoic acid and sorbic acid,two common preservatives in cosmetics,and improve detection efficiency and on-site detection capabilities.Methods:A portable Raman spectrometer which used silver nanoparticles as the enhancement substrate for surface enhanced Raman spectroscopy(SERS)was used to detect benzoic acid and potassium sorbate in cosmetics.Results:Benzoic acid and sorbic acid had characteristic Raman peaks at 1157 cm^(-1)and 871 cm^(-1),respectively.Further research showed that the concentrations of benzoic acid and sorbic acid were linearly correlated with the intensity of their characteristic Raman peaks,making quantitative detection possible.This was confirmed by traditional liquid chromatography,and the quantitative results were consistent.Conclusion:This SERS method has the advantages of simplicity,speed,and efficiency,and is expected to achieve rapid on-site detection of preservatives.
作者
张雯
杨莹
庞贝妮
ZHANG Wen;YANG Ying;PANG Bei-Ni(Shanghai Institute of Quality Inspection and Technical Research,National Institute of Quality Inspection and Research on Cleaning Product in Shanghai,Shanghai 200233,China)
出处
《实验室检测》
2024年第2期5-9,共5页
Laboratory Testing
关键词
表面增强拉曼光谱
便携式拉曼光谱仪
防腐剂
现场快速检测
surface enhanced Raman spectroscopy
portable Raman spectrometer
preservative
on-site rapid detection
作者简介
通信作者:庞贝妮,硕士,中级工程师,研究方向:微生物检测。E-mail:pangbn@sqi.org.cn;张雯,硕士,助理工程师,研究方向:仪器分析。E-mail:zhangwen@sqi.org.cn
