等离激元增强拉曼光谱食用合成色素快速检测系统设计

基于等离激元增强拉曼光谱技术，研制出适合现场分析检测的食用合成色素快速检测系统，适用于饮料、肉制品、蜜饯等食品中合成色素的快速检测。检测系统的硬件部分主要由双CPU(ARM和FPGA)主控板、样品前处理模块(含有增强粒子施加装置)、半导体激光光源、光谱数据采集模块构成;软件部分控制样品前处理模块自动运行，并可读取被测样品的拉曼谱图。利用快速检测系统对三种实际样品(蜜饯、汽水、火腿肠)中的食用合成色素胭脂红、柠檬黄、诱惑红进行检测，以验证该系统在食用合成色素检测中的性能。样品检测结果的相对标准偏差小于±5%，表明此检测系统具有良好的灵敏度和重现性，且检测时间短，能够满足食品中合成色素现场快速检测的要求。

Design of Raman Spectroscopy Rapid Detection System for Synthetic Edible Pigment Based on PERS

Based on Plasmon-enhanced Raman Spectroscopy (PERS)technology,the detection system for rapid field determina-tion of synthetic edible pigments in food,such as beverage,meat productsand preserves,is presented.The hardware framework of this detection system is mainly composed of double central control chips (ARM and FPGA),a sample pretreatment module (con-taining a nanoparticle giving device),a laser diode source,and a spectral data acquisitioning module;Besides,the software can run the sample pretreatment module automatically while receiving the Raman spectrogram.To verify its performance in edible synthetic pigments,the rapid detection system was applied to determine carmine,citrine,allure red in three actual samples (i.e. preserves,sodas,sausage).The relative standard deviations of the sample detection were in the range of ±5%,which indicated that the system developed in this paper have the advantage of favorable sensitivity,excellent repeatability and short testing time. Thus,it meets the requirements for rapid field determination of synthetic pigments in food.