[Contamination and dietary exposure assessment of 2-chloropropanol esters in vegetable oils available on Zhejiang market during 2016-2020].

Objective: To investigate the occurrence data for 2-chloropropanol(2-MCPD) ester in edible vegetable oils purchased in Zhejiang Province during 2016-2020, and to estimate dietary exposures of 2-MCPD ester via vegetable oil.

Methods: A total of 404 samples of edible oils were collected from markets, stores, online shopping in Zhejiang Province, the occurrence of 2-MCPD ester was detected by gas chromatography mass spectrometry from 2016-2020. Data of vegetable oils consumption was obtained from the survey result of urban and rural residents in Zhejiang Province in 2008. The exposure levels of 2-chloropropanol ester was calculated for people aged 4-6, 7-10, 11-17, 18-59 and 60 years old and older from the consumption of vegetable oils.

Results: The detection rate of 2-MCPD esters in 404 samples was 82.7%(334/404) with the mean level of 0.32 mg/kg. Among them, the mean content of camellia oil was the highest with 1.23 mg/kg, followed by rice oil(0.69 mg/kg); sunflower oil, olive oil and soybean oil have relatively low average values, respectively with 0.11, 0.12 and 0.13 mg/kg. There are significant differences in 2-MCPD ester content in different types of edible oils of the same brand(P<0.05), the content of 2-MCPD ester in different brands of peanut oil was significant(P<0.05), but in different brands of corn oil was not statistically significant. Among the edible vegetable oil consumers, the average exposure of 2-MCPD esters in different age groups ranged from 0.21 to 0.69 μg/(kg·BW·d).

Conclusion: 2-MCPD esters pollution is widespread in vegetable oils, the severity of pollution was affected by the type and brand of the edible vegetable oil, and the intake of 2-MCPD esters was relatively high among people with high vegetable oil consumption and the general population of 4-10 years old.