Micro-determination of fluoride in biological samples by pyrohydrolysis and flow-injection analysis using a fluoride ion-selective electrode.
نویسندگان
چکیده
منابع مشابه
Determination of Fluoride in Various Samples and Some Infusions Using a Fluoride Selective Electrode
Introduction Fluoride (F−) is an important anion, present in various environmental, clinical and food samples. Small amounts of fluoride are vital for the human organism, but it is toxic in larger amounts. For adults the lethal dose is 0.20–0.35 g F− per kg body weight. Fluoride is widely used in various branches of industry and some fluoride compounds are formed as by-products in certain proce...
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The accuracy, precision, and reproducibility of a rapid method for determination of fluoride in wine, using a fluoride selective ion electrode, were established by a collaborative study involving 12 laboratories, 5 in Europe and 7 in the United States. The laboratories assayed 6 Youden pairs of fluoride-fortified, red and white wine samples with fluoride concentrations ranging from 0.2 to 3.0 m...
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Flow injection analysis (FIA) system incorporating a fluoride ion-selective electrode (FISE) as detector is described. Laboratory-built cascade flow cell equipped with FISE and reference electrode is used for flow injection potentiometric determination of Fe(III) based on monitoring of the formation of FeF2 in acid solution. Under optimized flow conditions (4.0 mL min–1, 300 μL samples, 10–5 mo...
متن کاملMeasurements with fluoride ion selective electrode
Where E0 is the standard electrode potential, R is the universal gas constant, T is the absolute temperature, z is the number of moles of electrons transferred in the cell reaction or halfreaction, F is the Faraday-constant, and cox and cred are the concentrations of the oxidized and reduced forms of the component. The potential of the hydrogen electrode is declared to be 0.000 V at all tempera...
متن کاملDetermination of fluoride in black, green and herbal teas by ion- selective electrode using a standard-addition method
Tea leaves are very rich in fluoride, since tea plants take up fluoride from the soil and accumulate in its leaves. Some of this fluoride is released into the infusion, which is drunk as tea. Fluoride in tea could be beneficial for the prevention of dental caries, but it may result in excessive intake and lead to enamel fluorosis. The purpose of this work was to determine the fluoride levels in...
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ژورنال
عنوان ژورنال: Nippon Eiseigaku Zasshi (Japanese Journal of Hygiene)
سال: 1991
ISSN: 0021-5082,1882-6482
DOI: 10.1265/jjh.45.1061