Related Experiment Video
Updated: Jun 21, 2025
Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
Published on: May 4, 2018
Highly sensitive antibiotic sensing based on optical weak value amplification: A case study of chloramphenicol
Lingqin Meng1, Lizhong Zhang2, Gengyu Liang2
1Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Shenzhen International Graduate School, Tsinghua University, Shenzhen City, Guangdong Province, China; Tsinghua Laboratory of Brain and Intelligence, Tsinghua University, Beijing, China.
This study introduces a novel, highly sensitive optical detection method for antibiotic residues in food. The technique uses optical weak value amplification for rapid and accurate identification of contaminants like chloramphenicol.
Area of Science:
- Analytical Chemistry
- Biosensing Technology
- Food Safety
Background:
- Antibiotic residues in animal-origin food pose a significant public health risk.
- Sensitive and rapid detection methods are crucial for monitoring food safety.
Purpose of the Study:
- To develop a novel, highly sensitive method for detecting small molecule antibiotics.
- To leverage optical weak value amplification for enhanced sensitivity in antibiotic detection.
Main Methods:
- Utilized optical weak value amplification combined with an indirect competitive inhibition assay.
- Employed chloramphenicol as a model compound for assay development.
- Validated the method's universality with gibberellin and tetracycline detection.
Main Results:
- Achieved a broad linear detection range up to 3.24 ng/mL for chloramphenicol.
- Demonstrated a high concentration resolution of 33.20 pg/mL.
- Successfully applied the method to detect other antibiotics and in real samples.
Conclusions:
- The proposed label-free optical sensing strategy offers a significant advancement in antibiotic detection.
- Optical weak value amplification enhances sensitivity for small molecule antibiotic detection in food safety applications.
