Brominated flame retardants (BFRs) are used in industrial and domestic materials, including furnishings, electrical and electronic equipment and building insulation, in order to delay the onset of fire. This proficiency test is specifically for Polybrominated diphenyl ethers (PBDEs), one of several groups of BFRs that have been found to escape into the environment and to enter the food chain. They have received much worldwide concern due to their presence and toxicity and are listed as persistent organic pollutants under the Stockholm Convention. It is therefore important to highlight areas of improvement within your current testing arrangement to ensure potentially high levels of these compounds are highlighted and quantified.Cod liver oil is commonly taken as a dietary supplement and is packed full of nutrients. It is one of the best sources of omega 3 fatty acids, and it contains relatively high levels of vitamin A and vitamin D. As such effective testing practises are required to highlight high levels of these compounds within the product. Ensuring the medicine works by safeguarding product quality and protecting consumers from potentially unsafe levels of this contaminant.Fapas proficiency testing should be used to underpin your ongoing quality assurance methods. Through the use of real food matrices, direct comparisons to your routine analysis methods can be made.