Abstract
Background: Fluoride is characterized by high toxicity, especially in prolonged exposures. Some plants including Rosemary can higher of accumulate up to 20 000 times this element concentration in the environment. Consumption of highly fluoridated rosemary can contribute fluorosis and other body dysfunctions. Aims: This study aims to evaluate and optimize the extraction procedure of fluorides from the dried leaves of the plant, and compare the fluoride levels in collected samples. Methodology: nine of Rosemary samples from different countries including Libya, southern Serbia, Vojvodina and Istria were investigated in this study. Fluoride levels was determined potentiometrically using the calibration curve, via fluoride-selective electrode method based on lanthanum fluoride monocrystal. The sensitivity of the method was defined on the basis of 3SD criteria 3 using excel software.
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