Screening for ochratoxin A in blood by flow injection analysis

Area of Science:

• Analytical Chemistry
• Toxicology
• Biomedical Science

Background:

• Ochratoxin A is a mycotoxin found in food and can contaminate human sera.
• Accurate and rapid detection methods are crucial for monitoring exposure and health risks.

Purpose of the Study:

• To describe a novel micromethod for ochratoxin A detection in human serum.
• To evaluate its suitability for large-scale screening and animal studies.

Main Methods:

• Flow injection analysis (FIA) technique utilizing fluorescence measurement.
• A simple extraction procedure requiring minimal chemicals and 50 microliters of serum.
• Comparison with an established enzymic method using 1675 human samples and 147 standards.

Main Results:

• The method can distinguish samples with less than 10 ng/mL ochratoxin A.
• Analysis time is under 15 minutes per sample, enabling high throughput.
• High correlation observed between FIA and the enzymic method.

Conclusions:

• The developed micromethod is efficient and suitable for large-scale screening of ochratoxin A in human blood.
• It is also applicable for monitoring ochratoxin A levels in experimental animals.
• Further confirmatory analysis is recommended for samples exceeding a certain fluorescence threshold.