A rapid method for the determination of fluoride in silicate rocks |
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| Affiliation: | 1. Department of Environment and Health, Istituto Superiore di Sanità, Rome, Italy;2. Water Research Institute (IRSA-CNR), National Research Council, Monterotondo, Italy;3. Department of Mineralogy, Petrology and Applied Geology, University of Barcelona, Spain;1. University of Iceland, Reykjavík, Iceland;2. University of Kyoto, Kyoto, Japan;3. School of Earth Sciences, University of Bristol, Bristol, United Kingdom;4. University of Applied Sciences, Dusseldorf, Germany |
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| Abstract: | A rapid method for the analysis of fluoride in silicate rocks is described. The sample is heated in a stream of oxygen and superheated steam (pyrohydrolysis), and fluoride determined spectrophotometrically as the purple-blue double complex with the cerium chelate of alizarin fluorine blue (3-maminomethylalizarin-NN-diacetic acid). 5 p.p.m. F− can readily be determined using 1 g of sample. |
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