Quantification of Ochratoxin A in 90 spice and herb samples using the ELISA method

Area of Science:

• Food Safety
• Analytical Chemistry
• Mycotoxicology

Background:

• Herbs and spices are popular alternative medicines but risk mycotoxin contamination.
• Accurate detection of mycotoxins like Ochratoxin A is crucial for consumer safety.

Purpose of the Study:

• To quantify Ochratoxin A in herbs and spices using a competitive direct ELISA kit.
• To analyze Ochratoxin A concentration levels using Principal Component Analysis (PCA) based on various factors.
• To assess the safety of herb and spice samples concerning Ochratoxin A contamination.

Main Methods:

• Solid-liquid extraction with 70% methanol for sample preparation.
• Quantification of Ochratoxin A using a competitive direct ELISA kit (Veratox for Ochratoxin).
• Analysis of results using Principal Component Analysis (PCA) to classify concentration levels.

Main Results:

• The ELISA method demonstrated high accuracy and precision with LOD (0.43-0.58 µg/kg) and LOQ (1.45-1.95 µg/kg) values.
• 73.33% of herb and spice samples were below the maximum residue limit (MRL) for Ochratoxin A.
• 26.67% of samples exceeded the MRL for Ochratoxin A, indicating potential health risks.

Conclusions:

• The developed method is effective for detecting and quantifying Ochratoxin A in herbs and spices.
• A significant portion of tested samples exceeded regulatory limits for Ochratoxin A.
• Continuous monitoring of mycotoxins in these products is essential to ensure consumer safety.