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纳米金粒子具有独特的物理、化学特性及较好的生物相容性,是目前现有的纳米材料中应用和研究最多的材料之一,其在诸多领域如生物传感器、表面电化学分析、免疫分析、药物传递以及治疗等方面都具有广阔的应用前景。纳米金具有极高的消光系数和强烈的粒子间距效应,其在分散状态下呈红色,变为交联团聚状态后呈蓝色,依据该特性建立了各种各样的纳米金比色快速检测方法。由于纳米金比色法具有操作简便、成本低廉、结果肉眼可见且灵敏度较高等优点,近年来在分析化学尤其是快速检测领域发展迅速,许多影响食品安全的有害物质可通过直接或间接作用影响纳米金的聚合状态,从而使纳米金比色法在食品安全检测中的应用成为可能。本文综述了纳米金比色法的原理及其在食品安全各类污染物中的检测应用,并总结了该方法面临的问题,提出了将来的发展方向。
Nano-gold particles have unique physical and chemical properties and good biocompatibility. They are one of the most applied and studied materials in the current nanomaterials. They are widely used in many fields such as biosensors, surface electrochemical analysis, immunization Analysis, drug delivery and treatment have a broad application prospects. Nano-gold has a very high extinction coefficient and a strong effect of particle spacing, which is red in the dispersed state, turned blue after the cross-linked aggregation, based on the characteristics of the establishment of a variety of rapid detection of gold nano color method. In recent years, the rapid development of analytical chemistry, especially rapid detection, many of the harmful substances that affect food safety can affect the performance of nano-particles through direct or indirect action. Because nano-gold colorimetric method has the advantages of simple operation, low cost, visible macroscopic and high sensitivity, Gold polymerization state, so that nano-gold colorimetry in food safety testing possible. This review summarizes the principle of nano-gold colorimetry and its application in the detection of various food safety pollutants. It also summarizes the problems faced by this method and puts forward the future development direction.