荧光铜纳米团簇用于食品和环境中Cr2O72-的检测研究
Fluorescent copper nanoclusters for the detection of Cr2O72-in food and environment
赵干 1杨丽娜 1向晖 1贺诗雨 1刘洪林1
作者信息
- 1. 合肥工业大学食品与生物工程学院,安徽合肥 230601
- 折叠
摘要
重金属离子污染问题是食品和环境安全领域的一个重要课题,因此迫切需要开发科学灵敏的检测方法.文章使用4,6-二氨基-2-巯基嘧啶(DAMP)作为配体,在温和条件下,仅通过简单的搅拌,在10 min之内合成一种发射波长为590 nm的新型铜纳米团簇(copper nanoclusters,CuNCs).鉴于该团簇对于重铬酸根离子(Cr2O72-)高度的灵敏性和抗干扰能力,将其作为荧光探针,实现了对Cr2O72-的特异性和灵敏性检测,最低检出限为0.7 μmol/L.通过加标回收试验,验证其在饮用水和湖水实际样品中对Cr2O72-的荧光检测能力,荧光变化显著,其加标回收率在94.3％～108.2％之间,相对标准偏差(relative standard deviation,RSD)均低于5％.结果表明该荧光探针对食品和环境中的Cr2O72-具有良好的检测效果.
Abstract
Heavy metal ion contamination is an important issue in the field of food and environmental safety,so it is urgent to develop scientific and sensitive detection methods.In this paper,using 4,6-diamino-2-mercaptopyrimidine(DAMP)as a ligand,a novel copper nanoclusters(CuNCs)emitted at 590 nm was synthesized by simple stirring within ten minutes in mild conditions.In view of its high sensitivity and anti-interference ability to dichromate ion(Cr2O72),the cluster was used as a fluores-cent probe to achieve the specificity and sensitivity detection of Cr2O72-,with the minimum detection limit of 0.7 μmol/L.The fluorescence detection ability of Cr2O72-in actual samples such as drinking water and lake water was verified by the labeling recovery test.The fluorescence changed significant-ly,and the labeling recovery rate was in the range of 94.3％-108.2％with its relative standard devia-tion(RSD)lower than 5％.The results show that the fluorescent probe has a good prospect for the detection of Cr2O72-in food and environment.
关键词
食品安全/环境安全/重金属污染/铜纳米团簇(CuNCs)/重铬酸根离子(Cr2O72-)/荧光检测Key words
food safety/environmental safety/heavy metal contamination/copper nanoclusters(CuNCs)/dichromate ion(Cr2O72-)/fluorescence detection引用本文复制引用
基金项目
国家自然科学基金资助项目(21874034)
出版年
2024
NETL
NSTL
万方数据