In this study, samples from five foods groups were analyzed: pasta, bread, breakfast cereals, chocolate wafers and biscuits. All products were purchased in national supermarket chains from the provinces of Alicante and Murcia (Spain) and were analyzed for t-As and i-As contents. The products under analysis were: 5 pasta samples, 3 bread samples, 2 breakfast cereals with chocolate, 2 chocolate wafers, and 4 biscuits, making a total of 16 products (in triplicate).