食品科学 ›› 2023, Vol. 44 ›› Issue (16): 237-242.doi: 10.7506/spkx1002-6630-20220614-145

• 成分分析 • 上一篇    下一篇

基于表面增强拉曼光谱和偶氮偶联反应对组氨酸的灵敏检测

关琦,颜贤仔,余莉莉,王翠萍,曾佩,张欢,王纯荣   

  1. (江西农业大学食品科学与工程学院,江西 南昌 330045)
  • 出版日期:2023-08-25 发布日期:2023-09-01
  • 基金资助:
    国家自然科学基金地区科学基金项目(31960500)

Sensitive Detection of Histidine Based on Surface-Enhanced Raman Spectroscopy and Azo-Coupling Reaction

GUAN Qi, YAN Xianzai, YU Lili, WANG Cuiping, ZENG Pei, ZHANG Huan, WANG Chunrong   

  1. (College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China)
  • Online:2023-08-25 Published:2023-09-01

摘要: 开发一种利用银枝晶作为表面增强拉曼光谱基底,结合偶氮偶联反应对组氨酸进行快速灵敏检测的方法。通过分别考察3-氨基苄胺、3-苯胺磺酸和2-氟-4-巯基苯胺(2-fluoro-4-mercaptoaniline,2-F-PATP)与组氨酸偶氮偶联反应得到衍生化产物的拉曼光谱发现:2-F-PATP对组氨酸的拉曼指纹图谱效果最好,对组氨酸检出限为10-21 mol/L。选择组氨酸偶氮偶联反应后的偶氮产物特征峰(1 387 cm-1和1 432 cm-1)进行定量分析,特征峰拉曼光谱强度与组氨酸浓度在一定范围内呈线性关系,相关系数R2分别为0.975 61和0.968 84。本方法可用于牛血清白蛋白、人血清白蛋白、α-乳白蛋白和苹果汁等的检测。本检测方法将表面增强拉曼光谱和偶氮偶联反应结合,具有灵敏度高、操作简便的特点,有良好的应用前景。

关键词: 表面增强拉曼光谱;银枝晶;偶氮偶联反应;组氨酸

Abstract: A method was developed for the rapid and sensitive detection of histidine using silver dendrimers as a substrate for surface-enhanced Raman spectroscopy in combination with azo-coupling reaction. The azo-coupling reaction of 3-aminobenzylamine, 3-anilinosulfonic acid or 2-fluoro-4-mercaptoaniline (2-F-PATP) with histidine was investigated. The Raman spectra of the resulting products revealed that 2-F-PATP gave the best Raman fingerprint for histidine, with a limit of detection (LOD) of 10-21 mol/L. The characteristic peaks (at 1 387 and 1 432 cm-1) of the azo-coupling product of histidine were selected for quantitative analysis, and the intensity of the characteristic peaks in the Raman spectra showed a linear relationship with histidine concentration in a certain range, with correlation coefficients (R2) of 0.975 61 and 0.968 84, respectively. This method can be used for the determination of bovine serum albumin, human serum albumin, α-lactalbumin and apple juice. The proposed method is sensitive and simple to use, and has good application potential.

Key words: surface-enhanced Raman spectroscopy; silver dendritic; azo-coupling reaction; histidine

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