食品科学 ›› 2025, Vol. 46 ›› Issue (4): 260-267.doi: 10.7506/spkx1002-6630-20240909-068

• 安全检测 • 上一篇    

基于PCN-225荧光分析法快速检测猪肉和牛奶中盐酸多西环素、甲硝唑和磺胺二甲嘧啶含量

介明沙,朱阿美,朱冰,蓝晟恺,和家新,岳晓月,赵电波   

  1. (1.郑州轻工业大学食品与生物工程学院,河南 郑州 450001;2.冷链食品加工与安全控制教育部重点实验室,河南 郑州 450001)
  • 发布日期:2025-02-07
  • 基金资助:
    国家自然科学基金青年科学基金项目(32402244);河南省科技攻关项目(242102111057;232102111061)

Rapid Quantitation of Doxycycline Hydrochloride, Metronidazole and Sulfadimidine in Pork and Milk Using PCN-225 Fluorescence Assay

JIE Mingsha, ZHU Amei, ZHU Bing, LAN Shengkai, HE Jiaxin, YUE Xiaoyue, ZHAO Dianbo   

  1. (1. College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China; 2. Key Laboratory of Cold Chain Food Processing and Safety Control, Ministry of Education, Zhengzhou 450001, China)
  • Published:2025-02-07

摘要: 为探索一种简便、快捷、灵敏检测猪肉和牛奶中的盐酸多西环素(doxycycline hydrochloride,DOX)、甲硝唑(metronidazole,MTZ)和磺胺二甲嘧啶(sulfadimidine,SM2)的方法,本研究合成锆基卟啉金属有机框架PCN-225荧光探针,利用其构建荧光传感器,测定DOX、MTZ和SM2这3 种抗生素的浓度。首先,对PCN-225的形貌、结构和性能进行表征优化,并采用荧光光谱、紫外-可见吸收光谱等对PCN-225的传感机理进行分析;其次,对PCN-225检测3 种抗生素(DOX、MTZ和SM2)的传感性能进行研究。结果显示,本方法对DOX、MTZ和SM2表现出优异的选择性和灵敏度,检出限分别为4.70、5.30 nmol/L和4.84 nmol/L。最后,使用本研究建立的传感方法对市售猪肉和牛奶DOX、MTZ和SM2进行检测,回收率在94.7%~110.8%之间,相对标准偏差均不高于1.1%。由此可见,本方法在以简单、高效、灵敏和快速的方式检测DOX、MTZ和SM2方面表现出了巨大潜力。

关键词: 金属有机框架;盐酸多西环素;甲硝唑;磺胺二甲嘧啶;荧光检测

Abstract: To explore a simple, rapid and sensitive method for the detection of doxycycline hydrochloride (DOX), metronidazole (MTZ) and sulfadimidine (SM2) in pork and milk, a porphyrinic zirconium metal-organic framework (MOF) material, PCN-225, was synthesized as a fluorescence probe and used to construct a fluorescence sensor to determine the concentrations of DOX, MTZ and SM2. First, the morphology, structure and properties of PCN-225 were characterized and optimized, and the sensing mechanism of PCN-225 was analyzed by fluorescence spectroscopy and ultraviolet-visible (UV-Vis) absorption spectroscopy. Second, the sensing performance of PCN-225 for detecting the three antibiotics was studied. The results showed that the developed method showed excellent selectivity and sensitivity for the detection of DOX, MTZ and SM2, with detection limits of 4.70, 5.30 and 4.84 nmol/L, respectively. Finally, the sensor was used to detect DOX, MTZ and SM2 in pork and milk. The recovery rates ranged from 94.7% to 110.8%, with relative standard deviations (RSDs) not higher than 1.1%. In conclusion, this method shows great potential for the detection of DOX, MTZ and SM2 in a simple, efficient, sensitive and rapid manner.

Key words: metal-organic framework; doxycycline hydrochloride; metronidazole; sulfadimidine; fluorescence detection

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