Abstract: Objective To investigate the levels of seven phthalate esters（PAEs） in crayfish and sea shrimp sold in Tianjin,and to conduct pollution characteristics and health risk assessment. Methods From April to July 2023,a total of 96 samples of sea shrimp and 96 samples of crayfish were collected in the circulation links of 16 districts under the jurisdiction of Tianjin. The content of PAEs in the samples was determined using ultra performance liquid chromatography-tandem mass spectrometry（UPLC-MS/MS）,and the data were analyzed. Results Totally 7 kinds of PAEs were detected in crayfish,and the concentration ranged from 0.001 to 11.4 mg/kg. The detection rate of DEHP was the highest（49.0%）,and the overall detection rate of PAEs was 75.0%. Four types of PAEs,including diethyl phthalate（DEP）,dibutyl phthalate（DBP）,diisobutyl phthalate（DIBP）,and DEHP,were detected in sea shrimp at concentrations ranging from 0.001 to 2.67 mg/kg. The detection rate of DEHP was the highest（30.2%）,and the overall detection rate of PAEs was 34.4%. The content and species of PAEs in crayfish were significantly higher than those in sea shrimp. The health risk assessment calculated that the hazard quotients（HQ） values of monomer PAEs in two types of aquatic products were both <1,and the carcinogenic risk（R） values were both <1×10^-6. Conclusion The pollution of PAEs in crayfish and sea shrimp sold in Tianjin should be paid attention to,and their health risks are within an acceptable range. Overall,the situation is safe.

Key words: Phthalate esters, Shrimp aquatic products, Pollution characteristics, Health risk assessment