Abstract:In order to monitor the pollution degree of livestock and poultry farms to the surrounding soil environment, 50 livestock farms in Chongqing were selected as samples to analyze the soil around them. Add appropriate amount of nitric acid, hydrochloric acid, hydrofluoric acid, and perchloric acid to the fresh soil sample. They are digested at high temperature, and then the acid is removed, and the volume is adjusted to 50 mL. Finally, the arsenic (As) content was measured by hydride generation-atomic fluorescence spectrophotometer (WC-HG-AFS) with water as carrier. The results of atomic fluorescence spectrophotometry are as follows: within the concentration range of 5.000 mg·kg-1~100.000 mg·kg-1, the linear correlation coefficient R2=0.99997; the detection limit is 0.0742 mg·kg-1, the relative standard deviation of the sample (RSD) ) is 1.585%. The relative deviations of the analysis results of 5 parallel samples are 6.86%, 7.68%, 1.12%, 13.10%, 11.25%, which are all less than the allowable relative deviation of 25.84%. The relative errors of the standard recommended values are 2.3%, 1.9%, and 2.7%, which are all smaller than their corresponding relative tolerance limits of 14.1%, 9.8%, and 21.3%. Except for the 011 monitoring point, the As content in the soil of other breeding areas is even lower than the highest limit of As in the first-level standard specified in the Soil Environmental Quality Standard (GB 15618-1995), which is 15 mg·kg-1.