Pesticide Residues (single residues) in Wheat Flour Proficiency Test

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Product Specification

Proficiency Test Information
Product Code Proficiency Test Matrix Approx. Size


Wheat Flour

100 g


2,4-DB, Ethephon, ETU, Fenbutatin oxide, Fosetyl Aluminium, Haloxyfop (free acid), MPPA, Phosphonic acid, PTU, Quizalofop (free acid)


These Pesticide Residues in Wheat Flour are not currently within scope of accreditation to ISO 17043

Test Description

This Fapas proficiency test can help evaluate your testing ability for pesticides within wheat.

This proficiency test is specifically for a range of pesticide residues that are generally determined using specific single-residue methods. Most pesticide residues are determined using multi-residue methods, that is ones in which potentially hundreds of compounds can be measured with a single extraction protocol and instrumental method, based on multi-stage mass spectrometry.  However, some pesticides are not very amenable to the generic multi-residue approach and still require more specific extraction regimes and chromatographic-mass spectrometric approaches.  This PT has a fixed list of such pesticides for determination by single residue methods.

Chlormequat, mepiquat and trinexapac-ethyl are plant growth regulators, with glyphosate being a broadspectrum systemic herbicide used routinely across the world.  Glyphosate is of key interest to the market at the moment, as the regulators decide how to proceed with the use of the herbicide and whether it should be banned. The residue definition to include its principal degradation products and metabolites, especially AMPA, means that methods are now being extended to include these related compounds. Testing proficiency is therefore needed to take advantage of this potential regulation change, where a large section of the global food supply chain would be affected.

Trinexapac-ethyl is a new addition to this proficiency test for 2022.

Fapas proficiency testing measures are invaluable for ensuring only high-quality test results are offered to your customers and regulators alike. This can be achieved with challenging test materials, which are enabled due to the real food matrices Fapas utilise. These challenging test materials can ensure effective areas of improvement are highlighted, with areas of importance available to ensure test results are detailed and accurate enough to satisfy your customers.

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