Congener Profile and Estimated Dietary Intake of Dioxins in Egyptian Food

Abstract

A total of 153 food samples grouped in 9 commodities (18 orange; 18 wheat; 18 vegetable oil; 18 tomato; 18 sesame; 18 potato; 18 rice and 9 dry bean) were collected from 9 different governorates in Egypt during 2015- 2016 and analyzed for polychlorodibenzo-p-dioxins (PCDDs), polychlorodibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (dl-PCBs), using High Resolution Gas Chromatography - High Resolution Mass Spectrometer (HRGC-HRMS). For PCDD/Fs, the most dominant congener in analysed samples was 1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin (OCDD), while (PCBs 118) congener was the more frequent dl-PCBs. The mean Toxic Equivalency (TEQ) concentration of ΣPCDD/Fs & dl-PCBs was descending arranged as following 0.9569, 0.1710, 0.1692, 0.1169, 0.0986, 0.0944, 0.0846, 0.0716 and 0.0440 pgWHO-TEQ2005/g w.w. in vegetable oil, orange, wheat, potatoes, onion, sesame, tomatoes, rice and dry