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A minimalist fluorescent MOF sensor array for Baijiu identification
Xiaofang Liu1, Jing Zhang1, Yi Ma2
1Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400044, PR China. luosteel@cqu.edu.cn.
A novel metal-organic framework (MOF) sensor array utilizing rare-earth elements offers rapid and accurate identification of Baijiu. This fluorescence-based method successfully distinguished 16 Baijiu brands and 11 organic molecules.
Area of Science:
- Materials Science
- Analytical Chemistry
- Chemical Sensing
Background:
- The beverage industry, particularly Baijiu production, requires robust quality control and authentication methods.
- Current analytical techniques for Baijiu may be time-consuming or require complex sample preparation.
- Developing rapid, sensitive, and selective sensors is crucial for the beverage market.
Purpose of the Study:
- To develop a minimalist fluorescence metal-organic framework (MOF) sensor array for the identification of Baijiu.
- To investigate the use of rare-earth-modified MOFs for creating unique fluorescence fingerprints.
- To establish a pattern recognition method for accurate Baijiu discrimination.
Main Methods:
- Synthesis of Europium (Eu) and Terbium (Tb) doped MOFs (Eu-MOFs and Tb-MOFs).
- Utilizing fluorescence spectroscopy (excitation at 325 nm, detection 400-700 nm) to analyze interactions with Baijiu components.
- Employing pattern recognition techniques to analyze fluorescence intensity changes and generate unique fingerprints/heat maps.
Main Results:
- Eu-MOFs and Tb-MOFs displayed distinct fluorescence characteristics affected by organic molecules in Baijiu.
- The sensor array accurately identified 11 different organic molecules based on their unique fluorescence fingerprints.
- A linear relationship was established between fluorescence intensity and ferulic acid concentration across different ranges.
- 16 different brands of Baijiu were identified with 100% accuracy.
Conclusions:
- The developed MOF sensor array provides a highly effective and rapid method for Baijiu authentication.
- The sensor's sensitivity and selectivity demonstrate significant application potential in the food and beverage industry.
- This minimalist fluorescence sensor offers advantages in maneuverability and response time for quality control.
