Abstract:To solve the uneven detection of mineral elements in some infant formula food，this study used the dry method，wet method，microwave method，and reconstitution-microwave method to digest and detect samples.The results showed that the data quality of the dry method was the worst. As compared with the microwave method，the content of copper，iron，potassium，magnesium，manganese，and sodium of the wet method had no significant difference（P＞0.05），and the relative standard deviation（RSD）of the detection results of some mineral elements（copper，iron，potassium，sodium，phosphorus，and zinc）was decreased but did not meet the expectations. The detection by the microwave method showed that after the samples were reconstituted，the content of most elements was low when samples were reconstituted with water，especially that of iron，and the RSD was relatively large. However，when samples were reconstituted with 5% nitric acid，the content was not significantly higher or lower，but the RSD was significantly reduced. Therefore，the detection of mineral elements in infant formula food by the microwave method after the reconstitution of samples with 5% nitric acid can solve the problem of uneven detection of mineral elements in samples.