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Chinese Journal of Organic Chemistry >

0 251017

DOI: https://doi.org/10.6023/cjoc202507024

ARTICLE

Application of an Intelligent Integrated Platform Based on “OFF-ON” Fluorescent Probe in Salmon Freshness Monitoring

  • Sun Xiaofei ,
  • Zhang Haiyuan ,
  • Li Juan ,
  • Ma Ji ,
  • Wang Ruoxi ,
  • Zhong Keli ,
  • Li Xuepeng ,
  • Liang Tianyu ,
  • Tang Lijun ,
  • Li Jianrong
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  • aBohai University, College of Food Science and Engineering, College of Chemistry and Materials Engineering, Institute of Oceanography,National and Local Joint Engineering Research Center for Storage, Processing and Safety Control Technology of Fresh Agricultural Products Liao Ning 121013;
    bFoshan University, Guangdong Provincial Key Laboratory of Food Intelligent Manufacturing,GuangDong, 528225;
    cNational University of Singapore, College of Science, Department of Food Science and Technology, Singapore, 117542

Received date: 2025-07-19

  Revised date: 2025-09-07

  Online published: 2025-10-15

Supported by

National Natural Science Foundation of China Youth Science Fund Project (32201948); Open Fund of Guangdong Provincial Key Laboratory of Food Intelligent Manufacturing (2022B1212010015, GPKLIFM-KF-202410); Local Innovative Sub-project of the Local Cooperation Project of the National Scholarship Council of China and Liaoning Provincial Department of Education (202308210400); Guangdong Province Open Fund for Key Laboratory of Aquatic Product Processing and Safety (GDPKLAPPS2404); the Scientific Research Fund of Liaoning Provincial Education Department (No. LJ212510167023).

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Abstract

Fish freshness is closely related to food safety and human health. Therefore, it is of great significance to develop a rapid, simple, non-destructive and intuitive fish freshness detection method. Herein, an “OFF-ON” fluorescent probe PTD was successfully synthesized by using thiophenealdehyde and 2,4-thiazolidinedione through Knoevenagel condensation. The probe had dual recognition capability of colorimetric and fluorescence for amines in solution, with high sensitivity (1.20 μM) and fast response speed (3 s). The prepared PTD-loaded indicator label exhibited dual-channel response to the salmon freshness, with the daylight color changing from orange to earth-yellow and the fluorescence shifting from bright orange to flesh pink. By utilizing smartphone software and the indicator label, an intelligent integrated detection platform was constructed, which could automatically output the total volatile basic nitrogen (TVB-N) value of salmon. Under room temperature condition, its accuracy and reliability were confirmed by the Chinese national standard method. This study is expected to provide new ideas for portable intelligent detection fields and offer a smart reading tool for assessing fish freshness to merchants, consume

Key words： Fluorescent probe; indicator label; intelligent integrated platform; freshness

Cite this article

Sun Xiaofei , Zhang Haiyuan , Li Juan , Ma Ji , Wang Ruoxi , Zhong Keli , Li Xuepeng , Liang Tianyu , Tang Lijun , Li Jianrong . Application of an Intelligent Integrated Platform Based on “OFF-ON” Fluorescent Probe in Salmon Freshness Monitoring[J]. Chinese Journal of Organic Chemistry, 0 : 251017 . DOI: 10.6023/cjoc202507024

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