بقايا المبيدات الحشرية الكلورية في بعض عينات الخضروات في الأسواق المحلية مدينة المرج /ليبيا

Abstract

The study aims to reveal the Pesticide Residues of Chlorine in Some Vegetable Samples at Libyan Markets. This study was conducted on a group of vegetable samples (pepper, tomato, zucchini and cucumber) in Al-Marj city, in three cases (without washing - washed - when peeling). Twenty two samples of vegetables were carried out. These samples were collected randomly from markets at Al-Marj city. Analysis of samples was carried out by using dry incineration and then titration with silver nitrate. In this method, the reagents were used: as a guide of calcium chromate at a concentration of 1.0 percent, calcium oxide free of chlorides, acetic acid, 200 ml of concentrated acetic acid was diluted with 800 ml of distilled water, silver nitrate at a concentration of 0.05 calibres by dissolving 8.5 g of silver nitrate in Water, dilute the solution per liter. The concentration of this solution was verified by titrating it with a standard solution of sodium chloride . The chloride concentration was calculated from the volume and titration of the used silver nitrate solution by the relationship: N1 X V1 = N2 X V2. The study found that there are pesticide residues of chlorine, which exceed what the World Health Organization recommended in terms concentration. Recommendations and findings have been made in this study