Ochratoxin A in Roasted Coffee from French Supermarkets
Author Information
Author(s): Mariana Tozlovanu, Annie Pfohl-Leszkowicz
Primary Institution: Laboratory Chemical Engineering, Department Bioprocess & Microbial System, UMR CNRS/INPT/UPS 5503, ENSA Toulouse, France
Hypothesis
The study aims to analyze the presence of ochratoxin A (OTA) in roasted coffee and its transfer into coffee beverages using different analytical methods.
Conclusion
The study found that OTA levels in coffee are often underestimated due to analytical interferences, and the intake of OTA via coffee beverages can be significant.
Supporting Evidence
- OTA was detected in all coffee samples analyzed, with levels ranging from trace to 11.9 µg/kg.
- The study found that OTA recoveries from prepared beverages were similar across all methods used.
- Interferences from compounds like OTB and the formation of OP-OA during extraction led to underestimation of OTA levels.
Takeaway
This study looked at how much of a harmful substance called ochratoxin A is in coffee and how it gets into the coffee we drink. It found that sometimes we think there's less of it than there really is.
Methodology
The study used two validated methods for analyzing OTA in coffee: one with immunoaffinity column clean-up after alkaline extraction and another using toluene extraction under acidic conditions.
Potential Biases
There is a risk of underestimating OTA levels due to the formation of derivatives that are not recognized by OTA antibodies.
Limitations
The study's findings may be limited by the presence of interfering substances that affect OTA detection.
Digital Object Identifier (DOI)
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