FDA Elemental Analysis Manual for Food a

文章名：GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRIC DETERMINATION OF LEAD AND CADMIUM EXTRACTED FROM CERAMIC FOODWARE（石墨炉的） This method describes procedures for using graphite furnace atomic absorption spectroscopy (AAS) to quantitatively determine lead and cadmium extracted by acetic acid at room temperature from the food-contact surface of foodware. The method is applicable to food- contact surfaces of silicate-based materials (earthenware, glazed ceramicware, decorated ceramicware, decorated glass, and lead crystal glass) and is capable of determining lead concentrations greater than approximately 0.005–0.020 μg/mL and cadmium concentrations greater than approximately 0.0005–0.002 μg/mL, depending on instrument design. This method also describes quality control procedures to check for contamination and matrix interference and a specific analytical sequence of measurements that demonstrates proper instrument operation during the time period in which sample solutions are analyzed.