Fluoride content of tap water and commercially bottled drinking water in Amphur Muang,Khon Kaen (original) (raw)

Khon Kaen University Dental Journal วิทยาสารทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่น, 2011

Abstract

The purpose of this study was to determine the fluoride content in the tap water from four water supplies and 83 brands of commercially bottled drinking water in Amphur Muang,Khon Kaen.The Fluoride assay was performed using the fluoride ion analyzer ( Orion Model EA 940 ionalyzer,electrode Orion model 94-90). Each sample was analyzed twice at 25 degree celcius and the average of measurement was calculated.The rasults showed that the mean fluoride contents in tap water and in commercially bottled drinking water were 0.075 ± 0.030 ppm (CI 95% = 0.028-0.122) and 0.086 ± 0.114 ppm,respectively.The mean fluoride contest in 29 brands produced in Amphur Muang district was 0.062±0.054 ppm(CI 95% = 0.063-0.136). By considering 70 brands of general drinking water was 0.073±0.101 ppm and that in mineral water was 0.155±0.152 ppm. When the commercially bottled drinking water was classified into 3 groups by their fluoride levels: 79 brands (95.2%) had less than 0.3 ppm fluoride; 3 brands (3.6%) between 0.3 and 0.6 ppm and 1 brand (1.2%) greater than 0.6 ppm. In conclusion,most of the fluoride concentration in tap water ans commercially bottled drinking waters surveyed in this study was less than 0.3 ppm which was considered too low to cause dental fluorosis.Dentists, however,should be aware of both the age of child patients and the fluoride concentrations of the drinking water when prescribing fluoride supplements. Key words : Fluoride / Tap water ? Bottled drinking water

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