The aim of this work was to determine the total concentration and the effect of in vitro digestion on the bioaccessible fraction of aluminium (Al) in 35 different cereal-based baby food samples and estimate the exposure to this element considering the consumption of this product. Total Al content was determined by inductively coupled plasma optical emission spectrometry after oxidative microwave digestion. An in vitro digestion method was applied and optimized to evaluate the bioaccessible fraction. The methods performance was efficient for both approached analysis and presented limits of detection and quantitation of 53 μg kg^-1 and 89 μg kg^-1, respectively. Total concentration and bioaccessibility varied according to the product composition (rice, oat, wheat, barley, corn, multicereal and fruit). Multicereals and fruit-based (plum) cereals presented the highest total Al concentrations (8.82 mg kg^-1 and 7.49 mg kg^-1, respectively), whilst lower values were observed for corn and rice flour cereals (0.92 mg kg^-1 and 1.09 mg kg^-1, respectively). The bioaccessible fraction varied from 1.5% to 10.4% in the evaluated samples. Exposure to Al was estimated and compared with the Provisional Tolerable Weekly Intake (PTWI) of 2 mg kg^-1 body weight. The results showed that the daily consumption of three portions of cereals contributes up to 10.48% of the PTWI, when considering the total Al concentration reported in this study.

这项工作的目的是确定35种不同谷类婴儿食品样品中总浓度以及体外消化对铝（Al）生物可及部分的影响，并考虑到该产品的消耗量来估算该元素的暴露量。氧化微波消解后，通过电感耦合等离子体发射光谱法测定总铝含量。应用了体外消化方法并对其进行了优化，以评估生物可及级分。方法的实施是有效的两个接近分析并呈现检测和53定量限微克千克^-1和89微克千克^-1， 分别。总浓度和生物利用度根据产品成分（大米，燕麦，小麦，大麦，玉米，多谷物和水果）而异。多谷物和水果基（李子）谷物的总Al含量最高（分别为8.82 mg kg ^-1和7.49 mg kg ^-1），而玉米和米粉谷物的Al含量较低（0.92 mg kg ^-1和1.09）分别为mg kg ^-1）。在评估的样品中，生物可利用分数从1.5％到10.4％不等。估计铝的摄入量，并将其与2 mg kg ^-1的暂定每周耐受摄入量（PTWI）进行比较体重。结果表明，考虑到本研究报告的总铝含量，三份谷物的每日消费量占PTWI的比例高达10.48％。