الفهرس 
A comparative study of fluoride content in drinking water, soft drinks and fruit juices in Egypt and Qatar
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Abstract
The aim of this study was to determine the fluoride ion concentration in available types of bottled drinking water, fruit juices and soft drinks in Egypt and Qatar.The samples were classified in to two main groups.group {A} : Collected from various supermarkets and groceries which include the governorates of Cairo, Giza, Kalubia constitutes group (A) subdivided into: I - Bottled water (available in Cairo, Giza and kalubia).II -Fruit juices (available in Cairo, Giza and kalubia. III-Soft drinks (available in Cairo, Giza and kalubia group { B } : Collected from Doha, the capital of Qatar, are considered group (B) subdivided in to: I- Bottled water (available in Doha). II- Fruit juices (available in Doha).III-Soft drinks (available in Doha).The analysis of the samples was performed by one method using fluoride ion selective electrode and TISAB II. The result of this study showed that: The fluoride ion concentration in bottled water available in Qatar show little higher than those available in Egypt, because the main source of drinking water in Qatar is the desalinated sea water (the fluoride level of oceans ranges from 1.2 to 1.4 ppm) while the main source of drinking water in Egypt is mainly the artesian wells and River Nile which has fluoride content average 0.36 ppm and there was no statistically significant difference between the two groups. Fruit juices available in Egypt showed statistically significantly higher values of fluoride ion concentration than those available in Qatar.There was no statistically significant difference between the two groups (Egypt and Qatar) in fluoride content of soft drinks available. In the present study, it was found that the Schweppes (bottled water-Egypt) with fluoride content (0.412 ppm) and the Nestle (bottled water-Qatar) with fluoride content (0.855 ppm), have the highest fluoride content.While the Easy Mouzoo (cocktail juice-Egypt) has fluoride concentration of (0.195 ppm) and the Libbyes (guava juice- Lebanon) with fluoride concentration (0.250 ppm), have the highest fluoride concentration of fruit juices