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Abstract
Nickel is used in the production of margarine as a catalyst for hydrogenation. This may lead to the presence of its residues in the products and could cause allergic reactions. Therefore, monitoring of this metal in foods is essential for consumers. The described liquid sampling AAS procedure allows product control. Nickel was determined in 10 brands of margarine, and only in 3 samples its content was below the acceptable limit of 0.2 mg kg−1.