Abstract This work presents a study involving the determination of Cd, Cr and Pb in ceramic tableware by graphite furnace atomic absorption spectrometry (GF AAS) using a simple and practical slurry sampling method. A central composite design (CCD) was used to optimize the slurry sampling conditions. The obtained results were confronted by the ultrasonic acid decomposition, evaluating the instrumental parameters relevant to the accuracy and precision. In addition, recovery measurements of the analytes were performed and ranged between 90% and 111% for both methods. The concentrations obtained were in the range from 0.04 to 184; 67 to 1395 and 42 to 5305 μg g−1 for Cd, Cr and Pb, respectively. These concentrations were higher for some ceramic samples, which may be related to the raw material used for their manufacture and also due to the pigment used during the decoration process. In addition, the leaching study observed concentrations in the range from 0.07 to 1.68; 0.1 to 5.0 and 0.6 to 46.3 μg g-1 for Cd, Cr and Pb, respectively, and there is a possibility of migration of these toxic metals from the ceramic materials to the food.

中文翻译：

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石墨炉原子吸收光谱法测定陶瓷餐具中Cd、Cr、Pb的制样方法评价

摘要 本研究采用石墨炉原子吸收光谱法 (GF AAS)，采用简单实用的浆料取样法测定陶瓷餐具中的 Cd、Cr 和 Pb。中心复合设计 (CCD) 用于优化浆料采样条件。将所得结果与超声酸分解进行对比，评估与准确度和精密度相关的仪器参数。此外，还对分析物进行了回收率测量，两种方法的回收率都在 90% 到 111% 之间。获得的浓度范围为 0.04 至 184；Cd、Cr 和 Pb 分别为 67 至 1395 和 42 至 5305 μg g-1。对于某些陶瓷样品，这些浓度更高，这可能与用于制造它们的原材料有关，也与装饰过程中使用的颜料有关。此外，浸出研究观察到的浓度范围为 0.07 至 1.68；Cd、Cr 和 Pb 分别为 0.1 至 5.0 和 0.6 至 46.3 μg g-1，这些有毒金属有可能从陶瓷材料迁移到食品中。