Fluoride contents in green tea beverages available in Bangkok.

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Published: Dec 26, 2005

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ยุทธนา ปัญญางาม
Department of Bichemistry, Faculty of Dentisry, Chulalongkorn University, Pratumwan, Bangkok 10330
พรศรี ปฏิมานเกษม
Department of Bichemistry, Faculty of Dentisry, Chulalongkorn University, Pratumwan, Bangkok 10330
ระวีวรรณ ปัญญางาม
Department of General Dentistry, Faculty of Dentistry, Srinakharinwirot University, Wattana, Bangkok 10110

Abstract

The objective of this study was to determine and compare the amount of fluoride contents in green tea beverages available in Bangkok. There were 60 kinds of green tea beverages manufactured by 16 companies and classified by containers into bottled, carton and canned types. The 5 samples from each kind were collected and fluoride concentrations were determined by the ion selective fluoride electrode. The differences of mean fluoride concentrations of 2 or more dependent samples were compared by Mann-Whitney U test and Kruskal-Wallis test respectively at 95% significant level. The results showed that the ranges of mean fluoride concentrations of 29 kinds of bottled type, 23 kinds of carton type and 8 kinds of canned type were 0.153:0.004 to 2.036+0.005, 0.155+0.001 to 2.582=0.008 and 0.380+0.001 to 1.644+0.005 ppm respectively. There were 11 kinds of green tea beverages (18.4%) had fluoride concentrations > 1 ppm. The mean fluoride concentrations between the same manufacturers and flavors but different containers were significantly different (p <.05). From these data, it was concluded that the ranges of mean fluoride concentrations of green tea beverages available in Bangkok were 0.153+0.004 to 2.582+0.008 ppm. It was recommended that people who lived in area having high fluoride contents in food and natural water sources should not intake more than 1 ppm fluoride containing green tea beverages to prevent excessive fluoride consumption.

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1.
ปัญญางาม ย, ปฏิมานเกษม พ, ปัญญางาม ร. Fluoride contents in green tea beverages available in Bangkok. Th Dent PH J [Internet]. 2005 Dec. 26 [cited 2024 Jul. 18];10(1-2):61-72. Available from: https://he02.tci-thaijo.org/index.php/ThDPHJo/article/view/212851
Issue
Vol. 10 No. 1-2 (2005): January - December 2005
Section
Original Article

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