The test is delivered without color scale and can be evaluated only
with the photometers PF-12!
Normally, the content of fluoride in surface and ground water is lower than 1 mg/l.
Permanent consumption of water containing more than 2 mg/l fluoride can cause a drinking water fluorese
(a stained discolouration of the tooth enamel). On the other hand a content of fluoride lower than
0.5 mg/l could lead to an increasing risk of caries. The optimal content of fluoride in drinking water
is about 1 mg/l. To avoid problems with caries in some countries the content of fluoride in drinking
water is artificially increased. However, WHO and EC drinking water regulations recommend a threshold
value of 1.5 mg/l F–.
In some European countries, the threshold value for mineral water is also
1.5 mg/l F–. For the suitability of water for the preparation of baby
food a threshold value of 0.7 mg/l F– is recommended. Natural mineral
waters with a fluoride content of more than 5 mg/l must be labelled with a warning. |