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This document, part of EN 13130, specifies an analytical procedure for the determination of caprolactam in the food simulants distilled water, 3 % w/v aqueous acetic acid, 15 % v/v aqueous ethanol and rectified olive oil. The level of caprolactam monomer determined is expressed as mg caprolactam/kg of food or food simulant. The method is appropriate for the quantitative determination of caprolactam in an approximate analyte concentration range of 1,5mg/kg to 30 mg per kilogram of food simulant. This method is also applicable to the determination of the specific migration of caprolactam sodium salt, PM/Ref No 14230, as caprolactam sodium salt instantaneously hydrolyzes to caprolactam when in contact with aqueous media. NOTE The method should also be applicable to other aqueous food simulants as well as to other fatty food simulants e.g. sunflower oil, a mixture of synthetic triglycerides and volatile substitutes for fat simulants.