OBJECTIVE To establish a method for determination of heavy metals and harmful elements in Periplaneta americana, and conduct analysis according to international and domestic heavy metal limit standards. METHODS The contents of five heavy metal elements including Cd, As, Pb, Hg and Cu in 13 batches of samples were determined by ICP-MS. RESULTS Five elements showed good linearity within the test ranges (r≥0.999 2), with recovery rate ranging from 88.5％ to 117.0％ (RSD was 0.45％-3.96％). According to international and domestic standards, the unqualified rates of 13 batches of samples were between 7.69% and 100%, and the unqualified rate varied greatly. CONCLUSION The method established in this study can accurately determine the contents of heavy metals and harmful elements in Periplaneta americana. Among them, it is common for Cu to exceed the standard due to large difference in the set limits, and most standards do not require it. There are regulations on the limit of Pb, but the set value is relatively wide, and the limit can be appropriately lowered. The limits of Cd, As and Hg in the international standards have little difference compared with the domestic standards, and the unqualified rates are similar. It is considered that the limits of the three elements are feasible. It is necessary to establish a targeted standard for the limit of heavy metals and harmful elements in Periplaneta americana.
Key words
Periplaneta americana L. /
heavy metal /
harmful element /
ICP-MS
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