Sensitive Aflatoxin B1 Determination Using a Magnetic Particles-Based Enzyme-Linked Immunosorbent Assay

Area of Science:

• Analytical Chemistry
• Biotechnology
• Food Safety

Background:

• Aflatoxin B1 is a toxic contaminant requiring sensitive detection methods.
• Conventional immunoassays can be time-consuming and may lack optimal sensitivity.
• Magnetic particle-based assays offer potential advantages in speed and efficiency.

Purpose of the Study:

• To develop and optimize a magnetic particle-based enzyme-linked immunosorbent assay (mp-ELISA) for Aflatoxin B1 determination.
• To investigate the impact of antibody type and immobilization on magnetic beads.
• To establish optimal assay parameters for enhanced sensitivity.

Main Methods:

• Development of a competitive immunoassay using magnetic particles.
• Immobilization of anti-Aflatoxin B1 antibodies onto magnetic particle surfaces.
• Optimization of parameters including antibody type, tracer concentration, and incubation time.

Main Results:

• Successfully developed a sensitive magnetic particle-based ELISA (mp-ELISA).
• Investigated and optimized antibody immobilization and selection.
• Achieved a limit of detection (LOD) of 1 ppt for Aflatoxin B1.

Conclusions:

• The developed mp-ELISA is a sensitive and viable alternative for Aflatoxin B1 determination.
• Optimized antibody immobilization and assay conditions enhance detection capabilities.
• The method provides highly sensitive detection at the parts per trillion level.