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In this study, the profile of etoxazole in whole citrus, peel and pulp samples collected from Chongqing, Guangdong and Anhui provinces was monitored and their dietary risk to human had also been assessed. The final residual levels and distributions of etoxazole in citrus samples were detected by using an ultra-performance liquid chromatography coupled with tandem mass spectrometry (UPLC-MS/MS). The results showed that final concentrations of etoxazole in whole citrus, peel, and pulp were ranged at 0.012–0.174, 0.010–0.637, and 0.010–0.011 mg kg−1, respectively. The assessment of dietary risk suggested that chronic dietary risk of etoxazole in whole fruit and peel were 0.010–0.197% and 0.035–0.951%, respectively. Our findings indicated that the chronic risk of daily consumption of citrus fruit is acceptable at recommended dosage. • The profile of etoxazole in whole citrus, peel and pulp samples was monitored. • The dietary risk of etoxazole in citrus samples to human had been assessed. • Etoxazole residue distributions were peel > whole citrus > pulp. • The chronic risk of daily consumption of citrus is acceptable at recommended dosage. [ABSTRACT FROM AUTHOR]

In the karst areas of southwest China, soil fluoride levels are higher than in China (478 mg kg−1) and world (200 mg kg−1). High levels of F in the environment might pose a health risk to humans. The comprehensive exposure risk must be studied in this area. Herein, samples of crops and soil were collected from Bijie City, a typical karst area in southwest China, to investigate the pollution level and evaluate the comprehensive F exposure risk. The single-factor index (P Fw) and the geological accumulation index (I geo) were used. The hazard index (HI) was applied to assess exposure risk from multiple exposure routes. The results revealed that there is considerable F contamination in soil and crops in the study area. Average soil total fluorine (Ft) was 1139.13 mg kg−1, and soil water soluble F (Fw) was 3.792 mg kg−1. In corn, rice, wheat, and potatoes, F contents were 1.167–9.585, 1.222–6.698, 1.587–9.976, and 1.797–9.143 mg kg−1, respectively. The mean values of HI were 4.45 and 2.42 for children and adults, respectively, > 1, showing potential health risk exists. Youngsters are at a greater exposure risk than adults. From the results of contribution ratios of different exposure routes for health risk, the major exposure risk was determined to be from soil exposure. Based on this, we suggest that risk managers mainly strive to control the soil fluoride level and implement the risk education and communication. [Display omitted] • Serious soil F contamination exists in the Bijie area. • Comprehensive health risk assessment of F conducted for local residents. • Children are more prone to F exposure than adults. • Major F exposure risk is from soil. [ABSTRACT FROM AUTHOR]