Determination of Additives and their Breakdown Products in Extractants

Determination of Additives and their Breakdown Products in Extractants 

In addition to these considerations, there is also the rather more estoeric possibility of reaction between the extracted additive or its degradation products with a component of the extractant liquid to form compounds of different toxicology to the original additive. This factor should particularly be taken into account when dealing with edible oil types of extractants where distinct possibilities exist for reaction between migrated additives and components of the oil. 

Examples of the possibility of a degradation of an additive and its effect on the design of the analytical procedure are supported next by means of an example, i.e., the antistatic additive lauric diethanolamide which has been used in foodgrade polyolefin and polystyrene formulations. Lauric diethanolamide upon migration 

In fact any of this additive which extracts from a polymer into distilled water at 60 °C is hydrolysed fairly completely within a few days. The analytical problem, resolves itself, therefore, into the determination of traces of DBA degradation product in the presence of relatively small concentrations of lauric diethanolamide. A method for the determination of lauric diethanolamide and DBA in the aqueous and alcoholic extraction liquids of the British Plastics Bederation (BPB) test conditions and in liquid paraffin is described next. 

These methods are considered here in some detail as they illustrate the amount of method development that is sometimes required to achieve the required analysis. 

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