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Measurement of Fluoride Content in many Grands of Tea in Iraqi Markets | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 31, 6 B, 2013, Pages 167-173 PDF (432.09 K) | ||
| DOI: 10.30684/etj.31.6B.15 | ||
| Author | ||
| Thaer Nasser Daood AL-Saoor | ||
| Abstract | ||
| The fluoride contents in the infusions of (10) commercially available in the local market in Iraq of tea brands in leaf and bag forms was determined by a fluoride ion-selective electrode method. The effect of brewing time on fluoride release from tea was assessed. Results showed that fluoride release increased with increasing brewing time (3, 5 ,10 min). Fluoride level after 5 min brewing for green tea bags, black tea leaves and black tea bags was in the range of (80mg/kg),(122~309mg/kg)and(308~348 mg/kg) respectively .The WHO guideline for daily fluoride intake is( 2.00 mg) for children and ( 4.00 mg) for adults. Assuming that one consumes 4 cups of tea everyday (400 mL) and each cup uses (2.5 g ) of tea leaves, the daily fluoride intake from black tea leaves may be in the range ( 1.22 ~ 3.09 mg ). Similarly, intake from the green tea bags about (0.80 mg). Similarly, intake from the black tea bags may range from (3.01 ~ 3.45 mg ) . Thus according to the WHO recommendation for daily fluoride intake the black and green tea bags and black tea leaves are safe for all age groups . | ||
| Keywords | ||
| Fluoride Selective Electrode; Tea Infusion; Total Ionic Strength Adjustment Buffer | ||
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