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投稿时间:2022-12-13
投稿时间:2022-12-13
中文摘要: 为建立生物胺(biogenic amines,BAs)实时监测的比色传感方法,以功能性水凝胶为基底,将β-D-半乳糖五乙酸酯(β-D-galactose pentaacetate,β-D-GP)作为还原剂前体和氯金酸一起负载于功能性水凝胶上,BAs 能将β-D-GP 水解为还原性β-D-半乳糖,β-D-半乳糖进一步将氯金酸中的金离子(Au3+)还原为金纳米粒子(Au nanoparticles,AuNPs),导致颜色从无色变为紫红色,使用智能手机的图像处理软件获得试验体系红/绿/蓝(red/green/blue,RGB)数据,水凝胶的G 值用于量化BAs 的测定。进一步用紫外分光光度法验证该方法的可行性,并建立可视化探针。该文以酪胺(tyramine,Tyr)为模型,RGB 法和紫外分光光度法分别在酪胺浓度为2~200 μg/mL 和0.25~160 μg/mL 范围内呈现良好的线性相关性,相关系数R2大于0.980,且显色体系稳定,应用于发酵食品中生物胺的测定,其加标回收率在96.0%~124.0%。
Abstract:In this study,a colorimetric sensing method for real-time monitoring of biogenic amines(BAs)was established.With functional hydrogel as the base,β-D-galactose pentaacetate(β-D-GP)was used as the precursor of the reducing agent and loaded on the functional hydrogel together with chloroauric acid.BAs could hydrolyze β-D-GP to reducing β-D-galactose,and β-D-galactose could further reduce the gold ion(Au3+)in chlorauric acid to Au nanoparticles(AuNPs),resulting in a color change from colorless to purplish red.The image processing software of the smartphone was used to obtain red/green/blue(RGB)data of the test system,and the G value of the hydrogel was used to quantify the determination of BAs.The feasibility of this method was verified by ultraviolet spectrophotometry,and a visual probe was established.By using tyramine(Tyr)as the model,the RGB method and ultraviolet spectrophotometry showed a good linear correlation in the range of tyramine concentration of 2-200 μg/mL and 0.25-160 μg/mL,respectively,and the correlation coefficient R2 was greater than 0.980.The color system was stable,and it was applied to the determination of BAs in fermented food,with recovery efficiencies of 96.0%-124.0%.
文章编号:202414020 中图分类号: 文献标志码:
基金项目:云南省科技厅科技计划项目(202002AE320006)
作者 | 单位 |
李宏1,2,陈骏飞3,史巧3,汤回花3,王馨蕊3,刘毕琴3,李秋兰2,王艺洁2,杨德志2,杨亚玲2* | 1.云南农业大学,云南 昆明 650221;2.昆明理工大学 生命科学与技术学院,云南 昆明 650500;3.云南省农业科学院 农产品加工研究所,云南 昆明 650221 |
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