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Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...

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[Automating the solid phase extraction for the determination of ochratoxin A].

C Hinkel¹, I Kölling-Speer, K Speer

¹Institut für Lebensmittelchemie, Technische Universität Dresden, Bergstraße 66, D-01062, Dresden, Christian.Hinkel@chemie.to dresden.de.

Mycotoxin Research

|April 23, 2013

Summary

This summary is machine-generated.

Automated solid phase extraction (SPE) significantly reduces sample preparation time for determining ochratoxin A (OTA) in roasted coffee. This validated method offers a faster, reliable approach for mycotoxin analysis in various food products.

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Area of Science:

Food Chemistry
Analytical Chemistry
Mycotoxicology

Context:

Mycotoxin ochratoxin A (OTA) analysis in foodstuffs often involves lengthy sample preparation using solid phase extraction (SPE).
Roasted coffee is a common commodity where OTA contamination is a concern.
Reducing sample preparation time is crucial for routine analysis.

Purpose:

To evaluate an automated SPE system for cleaning up roasted coffee samples for ochratoxin A determination.
To validate the automated SPE method according to "Concept '98" standards.
To assess the applicability of the method for other matrices like liquorice roots, ginger, and valerian.

Summary:

An automated SPE system was successfully employed to shorten the preparation time for ochratoxin A (OTA) analysis in roasted coffee.
The method achieved a limit of detection (LOD) of 0.2 μg/kg and a recovery rate of 92%, meeting validation criteria.
OTA levels in roasted coffee samples ranged from the LOD to 3.4 μg/kg, and the method was also applied to liquorice, ginger, and valerian.

Impact:

Provides a significantly faster and efficient method for OTA determination in roasted coffee.
Enables quicker quality control and safety assessment of coffee and potentially other food products.
Facilitates routine monitoring of ochratoxin A contamination in the food industry.