[High sensitive ELISA for detection of atrazion]

Area of Science:

• Environmental Chemistry
• Analytical Chemistry
• Immunotechnology

Background:

• Atrazine is a widely used herbicide.
• Accurate detection methods are crucial for monitoring environmental contamination.
• Existing methods may have limitations in sensitivity or practicality.

Purpose of the Study:

• To establish a highly precise Enzyme-Linked Immunosorbent Assay (ELISA) for atrazine detection.
• To optimize reaction conditions for indirect-ELISA.
• To compare the performance of the developed ELISA with High-Performance Liquid Chromatography (HPLC).

Main Methods:

• Optimization of indirect-ELISA reaction conditions, including antigen-carrier protein conjugate concentration, primary antibody concentration, organic solvent, and secondary antibody-enzyme conjugate concentration.
• Detection of actual environmental samples using the established ELISA.
• Comparative analysis of ELISA and HPLC methods.

Main Results:

• A robust standard curve for indirect-ELISA was established with a high coefficient of determination (R²=0.9958).
• The limit of detection (LOD) was determined to be 1.972 ng/ml.
• The percent recovery for actual samples ranged from 80% to 120%, indicating good accuracy.
• The ELISA demonstrated higher sensitivity than HPLC in the low concentration range (0-6 ng/ml).

Conclusions:

• The developed ELISA method exhibits excellent specificity and high precision for atrazine detection.
• The ELISA is a viable alternative to large-scale instrumentation for testing real atrazine samples.
• This method offers a practical and sensitive approach for atrazine monitoring.