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Resonance light scattering method for detecting kanamycin in milk with enhanced sensitivity
Chengke Wang1, Chengen Wang2, Qingqing Wang3
1College of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, 212013, China. wangck@ujs.edu.cn.
Analytical and Bioanalytical Chemistry
|February 8, 2017
Summary
A new resonance light scattering (RLS) method detects kanamycin using aptamers and gold nanoparticles. This sensitive approach offers a promising tool for kanamycin detection in food safety applications.
Area of Science:
- Analytical Chemistry
- Biotechnology
- Nanotechnology
Background:
- Kanamycin is an antibiotic requiring sensitive detection methods.
- Existing methods like UV-visible spectroscopy have limitations in sensitivity.
- Food safety necessitates reliable antibiotic residue detection.
Purpose of the Study:
- To develop a highly sensitive and selective method for kanamycin detection.
- To utilize aptamer-functionalized gold nanoparticles for enhanced detection.
- To apply the method for real-world samples like milk.
Main Methods:
- Developed a resonance light scattering (RLS) assay.
- Employed kanamycin-specific aptamers for molecular recognition.
- Utilized gold nanoparticles (GNPs) as signal enhancers.
- Induced GNP aggregation via NaCl for signal amplification.
Main Results:
- Achieved sensitive kanamycin detection in the range of 10–600 nM.
- Established a limit of detection (LOD) as low as 1 nM.
- Demonstrated superior sensitivity compared to UV-visible spectroscopy.
- Successfully detected kanamycin in milk samples with satisfactory accuracy.
Conclusions:
- The developed RLS method offers high sensitivity and selectivity for kanamycin.
- This aptamer-GNP based assay is a valuable tool for food safety analysis.
- The method provides a sensitive and practical approach for antibiotic residue monitoring.
