Determination of gadolinium in sodium borate glasses

Reisfeld, R.; Biron, Ehud

doi:10.1016/0039-9140(70)80056-x

Cited by 18 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are many methods for the low-level Gd monitoring in solution. Most of them are spectroscopic methods such as spectrofluorimetry (Reisfeld and Biron 1970;Taketatsu and Sato 1978;Berg, Mainka, and Ache 1989;Hu et al 1997), spectrophotometry (Mori et al 1992), ICP-AES (Normann et al 2000), Novel Gadolinium Optical Sensor 191 ICP-MS (Behrens 1995;Cao, Yin, and Li 1999;Hennebruder et al 2004;Isnard et al 2005), LC (Winget and Lindstrom 1971), electron spin resonance (ESR) (Moyer and McCarthy 1969;Miyake and Imoto 1996;Miyake, Kanamaru, and Imoto 1986), laser-based multistep resonance ionization MS (Blaum et al 2002), phosphorescence (Gong and Zhang 1997), and some neutron activation methods (Marsh and Allie 1969;Jinno et al 1979). These methods have either low sensitivity, are time-consuming, involving multiple sample manipulations, or are too expensive for most analytical laboratories.…”

Section: Introductionmentioning

confidence: 99%

Design of a Novel Gadolinium Optical Sensor Based on Immobilization of (Z)-N′-((Pyridine-2-yl) Methylene) Thiophene-2-carbohydrazide on a Triacetylcellulose Membrane and Its Application to the Urine Samples

Zare-Dorabei¹,

Norouzi²

2009

Analytical Letters

View full text Add to dashboard Cite

In this work, for the first time we report a highly selective and sensitive Gd(III) optical sensor based on immobilization of (Z)-N 0 -((pyridine-2-yl) methylene) thiophene-2-carbohydrazide (PMTC) on a triacetylcellulose membrane. This optode exhibits a linear range 5.0 Â 10 À8 to 2.0 Â 10 À5 M of Gd(III) ion concentration with a detection limit of 1.1 Â 10 À8 M. The response time of the newly designed optode was within 1-2 min, depending on the Gd(III) ion concentration. The response of the sensor is independent of the pH solution in the range of 2.0-9.0. It manifests advantages of low detection limit, fast response time, and most significant, very good selectivity with respect to a number of lanthanide ions (La, Ce, Sm, and Eu ions). The proposed sensor could be successfully regenerated with a thiourea solution. Its response was reversible and reproducible (RSD less than 1.3%). This optode was applied to the determination of Gd(III) in synthetic and real samples.

show abstract

Section: Introductionmentioning

confidence: 99%

Design of a Novel Gadolinium Optical Sensor Based on Immobilization of (Z)-N′-((Pyridine-2-yl) Methylene) Thiophene-2-carbohydrazide on a Triacetylcellulose Membrane and Its Application to the Urine Samples

Zare-Dorabei¹,

Norouzi²

2009

Analytical Letters

View full text Add to dashboard Cite

show abstract

“…A systematic study of the luminescent characteristics of glasses containing rare earths was done in this laboratory. [1][2][3][4][5][6][7][8] There has been considerable spectroscopic investigation involving europium activated phosphors for several reasons.…”

Section: Introductionmentioning

confidence: 99%

Transition probabilities of europium in phosphate glasses

Reisfeld¹,

Velapoldi²,

Boehm³

et al. 1971

J. Phys. Chem.

View full text Add to dashboard Cite

Absorption, excitation, and emission spectra of europium have been measured in metaphosphate glasses, The oscillator strengths of the transitions of the 7Fo and 'F1 levels are calculated and compared with the values for aqueous solutions. The intensities and half-bandwidths of fluorescence from the SDo levels are compared with those of silicate glasses and aqueous solutions. The influence of the crystal fields of the glass 013 the hypersensitive AJ = 2 transition is discussed. The point symmetry of Eu in phosphate glass was found to be C,. The broadening of the spectral lines in glasses and aqueous solutions has been attributed to a multiplicity of sites with the same symmetry and various crystal field parameters.

show abstract

“…Associative clustering of rare earth ions to form new crystallographic sites in CaF2 is found to occur at high dopant concentrations in numbers much greater than that predicted by statistical arguments. In the CaF2:Er3+ fluoride compensated system, where the extra positive charge accompanying an Er3+ substitution into the lattice is charge compensated by an interstitial fluoride ion, several sites have been observed on the basis of their unique crystal field splittings of the Er3+ electronic levels (5). Sites containing two or more rare earth ions can be identified on the basis of their strong concentration dependence, complex fluorescence transients, and energy upconversion.…”

mentioning

confidence: 99%