高压密封消解样品,采用石墨原子吸收光谱法测定企鹅珍珠贝中镉的含量。在优化的试验条件下,镉浓度在0.3~5.0μg/L与吸光度呈良好线性关系,相关系数r=0.9993,检出限为0.1511μg/L,测得企鹅珍珠贝中镉含量为8.52 mg/kg,测定结果RSD均小于5%(n=6),平均回收率结果为106.3%(n=4)。该方法简便、快速,灵敏度高,准确性好,结果令人满意。 High-pressure sealed samples were digested, and the content of cadmium in penguin pearl shell was determined by graphite atomic absorption spectrometry. Under the optimal conditions, the concentration of cadmium was linearly correlated with absorbance at a concentration of 0.3 ~ 5.0μg / L, the correlation coefficient was 0.9993, the detection limit was 0.1511μg / L, and the content of cadmium in pearl penguin was 8.52 mg / kg The RSDs were less than 5% (n = 6) and the average recovery was 106.3% (n = 4). The method is simple, rapid, sensitive, accurate and satisfactory.