本文采用直接进样原子吸收光谱法测定贻贝标准物质中的Pb、Cd和Cu。首先将样品配制成悬浮液,然后直接注入石墨原子化器进行分析。由于不经样品消解,分离和富集等操作,节省了大量时间,文章讨论了基体改进效应和酸度影响。当Pb、Cd和Cu含量分别为2.02,4.98和7.46μg/g时,相对标准偏差分别为8.2％、4.2％和7.5％;加入回收率处于93～115％之间。最后与酸溶样法和标准值进行了对照,得到了一致结果。 In this paper, direct injection atomic absorption spectrometry was used to determine the contents of Pb, Cd and Cu in mussel. Samples were first prepared as a suspension and then directly into a graphite atomizer for analysis. As a result of the sample digestion, separation and enrichment and other operations, saving a lot of time, the article discussed the effect of matrix improvement and acidity. The relative standard deviations (RSDs) were 8.2%, 4.2% and 7.5% when the contents of Pb, Cd and Cu were 2.02, 4.98 and 7.46 μg / g, respectively. The recoveries were between 93 and 115%. Finally, compared with the acid-dissolving method and the standard value, we got the same result.