Rare Earth Ion Selective Electrodes: II. Europium and Praseodymium Compound Membranes

Suzuki, Yasuo; Itoh, Hisako; Nakano, Taisuke

doi:10.1007/978-1-4613-3406-4_113

Cited by 5 publications

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“…Only a few reports arefound in the literature on the preparation of rare-earth ISEs. These electrodes are either based on solid-state sensors of rare-earth oxide , or rare-earth compound membrane types or contain conventional liquid ion exchange membranes derived from dinonylnaphthalenesulfonic acid, bis(2-ethylhexyl)phosphoric acid, and tributyl phosphate . Some of those electrodes are reported to be highly sensitive to particular rare-earth ions but often suffer from the lack of selectivity and range of linearity required for the practical determination of individual rare-earth ions in a multicomponent solution.…”

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confidence: 99%

Samarium(III)-Selective Electrode Using Neutral Bis(thiaalkylxanthato)alkanes

et al. 1996

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Samarium(III)-selective electrodes constructed on the basis of bis(alkylxanthato)alkanes and bis(thiaalkylxanthato)alkanes are described. As a class, both types of compounds showed quantitative responses toward Sm-(III) ion. Among the ionophores tested in this work, the neutral carrier, 1,4-bis(3-thiapentylxanthato)butane, provided an ion-selective electrode almost ideal for determination of Sm(III) in aqueous solution. This electrode exhibits a Nernstian slope of 20 mV per concentration decade, with a detection limit of 5.0 × 10 -7 M Sm(NO 3 ) 3 . Acceptable selectivity was obtained for Sm(III) determination against many of the transition, alkali, alkalineearth, and some of the lighter rare-earth metal ions. Only Cu(II) and Fe(III) interfere seriously.

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Samarium(III)-Selective Electrode Using Neutral Bis(thiaalkylxanthato)alkanes

et al. 1996

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“…They mixed Ce(IV) oxide with araldite and epoxy adhesive homogeneously and then coated the mixture on the copper plate of the electrode body. Suzuki et al [2] prepared rare earth ion selective electrodes with europium and praseodymium compound membranes. The response behavior of electrode membranes of Eu(I1) Nb oxides and Eu(1I)B oxides and Pr60,, toward lanthanides was reported.…”

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confidence: 99%

Rare earth ion selective electrodes

Zhang

Wang

1993

Electroanalysis

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The System Boron-Oxygen

Heller

1986

B Boron Compounds

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earlier literature cited therein. All formulas including radicals are written according to IUPAC nomenclature [1). Boron Oxides The Boron Monoxide Radical, [BO)"The [BO)" radical is one of the fundamental species appearing as intermediates in oxidation reactions. Hot-pressed B4C was oxidized in wet nitrogen and/or wet air atmosphere at a water vapor pressure of 1.5 to 20 kPa and in dry air of 900 up to 1400·C. The oxidation of B 4 C by water vapor and dry air at 900·C results in a weight loss; hence, it is assumed that the formation of [BO]" (and/or HB02) seems to be the major reaction. The oxidation rate of B 4 C by water vapor at 900·C could be expressed by surface chemical reaction-controlled kinetics with an apparent activation energy of 200 kJ/mol [2).In the reaction of molecular oxygen with crystalline a-boron powder, oxygen atoms in concentrations exceeding the thermodynamical equilibrium value (above an inert surface) by four to seven orders of magnitude were observed. By the use of the resonance fluorescence of oxygen atoms between 350 and 1000 ·C, the proposed mechanism of the reaction is: ( Boron ignition and combustion with its surrounding atmosphere was studied by timeresolved emission spectroscopy in the range of 0.2 to 5.5 Ilm. In one experiment, boron powder was burned in an oxygen atmosphere with initiation by a pyrotechnic device. The energy transfer by the hot gases led to a glowing phase of the boron particles, which then changed to a high-temperature combustion and ended in a second glowing phase. The two glowing phases emitted continuous emission spectra, and the burning phase emitted the bands of [BO]" and [B02]". Another experimental setup was used to feed boron particles into a hot oxidizing atmosphere, which was provided by a propane-air flame. The reaction was observed by high-speed cinematography and time-resolved emission spectroscopy. The flame contained a small amount of background radiation, and the emitted bands Of [BO]

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Rare Earth Ion Selective Electrodes: II. Europium and Praseodymium Compound Membranes

Cited by 5 publications

References 2 publications

Samarium(III)-Selective Electrode Using Neutral Bis(thiaalkylxanthato)alkanes

Samarium(III)-Selective Electrode Using Neutral Bis(thiaalkylxanthato)alkanes

Rare earth ion selective electrodes

The System Boron-Oxygen

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