The monitoring of fluoride in ambient air by fluoridation rate candles |
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Authors: | P.C. Leung A.E. Perras |
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Affiliation: | Ontario Ministry of the Environment, Northwestern Region, Thunder Bay, Ont. P7E 2V6 Canada |
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Abstract: | The determination of fluoridation rate provides a relatively inexpensive time-average surveillance method for monitoring atmospheric fluorides in specific areas. The fluoride is collected by the reaction with calcium oxide coating on a filter paper strip during the exposure of the candle to ambient air. The collected fluorides are then extracted from the exposed filter paper into a buffer solution and subsequently determined by ion selective electrode. |
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