Electrode for Sensing Fluoride Ion Activity in Solution

Frant, Martin S.; Ross, John W.

doi:10.1126/science.154.3756.1553

Cited by 659 publications

(203 citation statements)

References 2 publications

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“…This value is in satisfactory agreement with the value 2.0 eV reported by Fielder [9] and the value 2.08 eV reported by Chadwick et al [10]. [3][4][5][6] In the intermediate region the ionic conductivity increases, and the activation enthalpy decreases with increasing dopant concentration (see figs. 3 and 4).…”

Section: "Pure"laf 3 (Samples 1 and 2)supporting

confidence: 82%

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Ionic conductivity in tysonite-type solid solutions La1−xBaxF3−x

et al. 1984

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The ionic conductivity of single crystals of tysonite-type solid solutions Lal_xBaxFa_x(O • x • 0.095) has been studied parallel and perpendicular to the crystallographic c axis in the temperature range 293-1300 K. Three regions can be discerned in the compositional dependence of the ionic conductivity: (i) the "pure" crystal, in which at room temperature no exchange occurs between different types of anion sites in the tysonite structure; (ii) an intermediate region (0 < x < 7 X 10 -2) which reveals changes in both the conductivity activation enthalpy and the magnitude of the conductivity; (iii) a concentrated solid-solution region (x > 7 X 10-2), where fluoride ions interchange easily among the different anion sublattices. Diffusion coefficients calculated from ionic conductivity results, are in good agreement with those calculated from 19F NMR measurements. Using the present data, along with 19F NMR data, dielectric relaxation data and structural considerations, mechanisms governing the ionic conductivity are proposed.

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Section: "Pure"laf 3 (Samples 1 and 2)supporting

confidence: 82%

“…as electrode in a galvanic cell (ref. [1]), as solid membrane in a gas sensor [2] and as fluoride ion-selective electrode [3,4]. With the advance of microelectronic techniques to manufacture, for instance, ion-selective electrodes, a growing demand for suitable solid-state inner membrane comacts has emerged.…”

Section: Introductionmentioning

confidence: 99%

Ionic conductivity in tysonite-type solid solutions La1−xBaxF3−x

et al. 1984

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“…Fluoride is easily absorbed but is slowly excreted from the body, which can result in chronic poisoning, acute gastric and kidney disorders, dental and skeletal fluorosis and even death. Fluoride can be accurately determined using fluoride-ion selective electrodes [8], spectrophotometry [9], gas chromatography [10] and even colorimetrically using boronic acid chemistry [11,12], although such systems are poisoned by the presence of sugars such as by glucose or fructose. It is due to the well-known high affinity between diol containing compounds and the boronic acid moiety that has lead to the development of carbohydrate sensors [13][14][15][16][17][18][19] chromatographic materials [20] and many glucose sensors [21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Wavelength–Ratiometric Probes for the Selective Detection of Fluoride Based on the 6-Aminoquinolinium Nucleus and Boronic Acid Moiety

Badugu

Lakowicz

Geddes

2004

Journal of Fluorescence

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Herein we report a set of new water-soluble fluorescent probes (N -boronobenzyl-6-aminoquinolinium bromides, BAQBAs) sensitive to aqueous fluoride. These probes shows spectral shifts and intensity changes in the presence of fluoride, in a wavelength ratiometric and colorimetric manner, enabling the detection of fluoride concentrations at visible wavelengths, in the concentration range ≈1-300 mM. Although the sensing mechanism is different for fluoride as compared to the other halides, we have tested the utility of these probes towards the other halides, and the results reveal that the BAQBAs are in fact potential candidates towards the sensing of the all the halides, but in different concentration ranges. As the probes are based on the boronic acid moiety, which is a well-known fluoride and sugar chelator group, we have investigated the response of sugars (such as glucose and fructose, which are present in biological fluids and foodstuffs) as interferences in fluoride detection using these probes. Interestingly, the BAQBAs show a suppressed sugar response potentially allowing for the predominant fluoride sensitivity. In addition to physiological sugars, we also have assessed the response of aqueous halides as potential interferents, or indeed analytes to be sensed, and show that the new boronic acid containing probes respond well to aqueous fluoride in the presence of a high background of other species, such as in a biological cocktail of 50 mM Glucose, 50 mM aqueous Chloride and 5 mM Fructose.

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“…the fluoride specific ion electrode is more popular because of its speed than other methods. Selective electrode method introduced by Frant and Ross (1966) offer an electrochemical response which is proportional to the fluoride ion activity in sample.…”

Section: Sampling and Sample Preparation For Industrial Workersmentioning

confidence: 99%

Fluoride-induced impact of aluminium industrial power plant on plants and human inhabiting areas

Pandey

Kumar

Rani³

et al. 2014

Geofizika

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Fluorine is a highly reactive common element that does not occur in nature in the elemental state. It exists in the form of fluorides and accounts for about 0.3 g/kg of the Earth's crust. Generally, it is found in the form of a number of minerals like fluorspar, cryolite and fluor-apatite. Fluoride has both positive and negative effects on individual health. Fluoride, in the form of fluorspar and cryolite is distributed extensively in the lithosphere, and is renowned as the thirteenth most common among elements in the earth's crust. Hydrogen fluorides in gaseous form accumulate in the leaves of generally sensitive plants against a concentration gradient and therefore, considered as a most phytotoxic air pollutant and affects plants at extremely low concentration. As per our study, it is found that the fluoride impacts on fauna are in normal condition, but in coming times it may have adverse impact on fauna and flora of surroundings of Hindalco Industries Limited.

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Electrode for Sensing Fluoride Ion Activity in Solution

Cited by 659 publications

References 2 publications

Ionic conductivity in tysonite-type solid solutions La1−xBaxF3−x

Ionic conductivity in tysonite-type solid solutions La1−xBaxF3−x

Wavelength–Ratiometric Probes for the Selective Detection of Fluoride Based on the 6-Aminoquinolinium Nucleus and Boronic Acid Moiety

Fluoride-induced impact of aluminium industrial power plant on plants and human inhabiting areas

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