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molecular sensor could protect people against a potential carcinogen: fluoride

Used in adequate amounts, fluoride makes teeth stronger and assists in the treatment of the osteoporosis. But when you consume excessive amounts, can be converted into a carcinogen that causes cancer in bone, lung and bladder. For its positive properties, fluoride is added frequently to the public water supply or water table salt and the vast majority of toothpastes (dentifrices) for adults commercially produced. Determine

the level of fluoride, either in the water, consumer products or in the human body has been an important and attractive challenge for scientists. To respond, a researcher at the University of Florida has developed a molecular sensor that changes color when you add a sample containing fluoride. When designing a suitable sensor, the laboratory has achieved an extraordinary sensitivity "nanomolar" to the fluoride, which means it can detect a number of one ten thousandth of a milligram of fluoride per liter of water. This makes it one of the most sensitive sensors of fluoride are known to date.