Radiochemical Determination of Total Rare Earths by Liquid-Liquid Extraction

McCown, J.J.; Larsen, R.P.

doi:10.1021/ac60176a042

Cited by 30 publications

(10 citation statements)

References 7 publications

(1 reference statement)

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“…However, rare earths are not easily determined by a standard method owing to their chemical and physical similarity, their typically low concentrations, and their complex emission and absorption spectra. The ICP-AES technique for rare earth determination has superseded the use of earlier techniques, such as neutron activation analysis (24)(25) and isotope dilution mass spectrometry (26), with respect to high specificity, high sensitivity, excellent detection capability, high precision and accuracy, and complete element cover.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for the Direct Determination of 28 Analytes in a Ce Matrix Without Chemical Separation Using CCD Detector-based ICP-AES

Airan¹,

Sengupta²

2015

At.Spectrosc.

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Section: Introductionmentioning

confidence: 99%

A Novel Approach for the Direct Determination of 28 Analytes in a Ce Matrix Without Chemical Separation Using CCD Detector-based ICP-AES

Airan¹,

Sengupta²

2015

At.Spectrosc.

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“…However, the selective determination of these metal ions is complicated by the similarity of their chemical properties and the fact that they all exist primarily as trivalent cations in solutions 9 . Available methods for low level determination of rare earth metal ions in solution include spectrophotometry, inductive coupled plasma-atomic emission spectroscopy, isotope dilution mass spectroscopy, neutron activator analysis, x-ray florescence spectrophotometry [10][11][12][13][14] . These methods are either time consuming, involving multiple analysis or too expensive for most of the analytical laboratories.…”

Section: Introductionmentioning

confidence: 99%

Potentiometric Sensors for Pr(III) Based on N-N᾽o‐Phenylene‐bis(salicylideneimine) Using Epoxy Resin and PVC as Binding Materials

Harish¹,

Verma²,

Kapoor

2011

Journal of Chemistry

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Praseodymium(III) ion selective electrodes have been prepared usingN-N᾽o-phenylene-bis(salicylideneimine) as a suitable electro-active material. Several membranes comprising of varying compositions of electro-active material with epoxy resin and polyvinylchloride (PVC) as binding materials were prepared. However the one with composition 50% Schiff᾽s base and 50% binder was found to exhibit best performance. The sensor with epoxy resin as binder presents a linear dynamic range of 1.0×10-6to 1.0×10-1M with a Nernstian slope of 19.9 mV/decade. The sensor has a quick response time. (less than 10 s). The reproducibility of the electrode is about 6 months without any considerable, noticeable potential divergence. The sensor is effective in pH range of 3.00-8.62. In case of PVC as binding material; the results are compared for same composition of electro-active material. The sensor presents a linear dynamic range of 1.0×10-6to 1.0×10-1M with a slope of 14.0 mV/decade. The response time of the sensor is found to be 20s with a reproducibility of 4 months. The sensor is effective in pH range of 2.97-8.90. Effect of internal solution was studied and both the electrodes could satisfactorily be used in partially non-aqueous medium. Selectivity coefficients for both the electrodes have been determined by FIM (fixed interference method) with respect to many rare earth metal ions, alkali & alkaline earth metal ions and some transition metal ions. Both the electrodes were successfully employed as indicator electrode in the potentiometric titration of Pr(III) ions with oxalic acid and EDTA.

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“…A number of instrumental techniques such as spectrophotometry [3,4] inductively coupled plasma mass spectrometry (ICP-MS) [5,6], ICP-AES [7], isotope dilution mass spectrometry [8 -10], neutron activation analysis [11,12] and X-ray fluorescence spectrometry [13] etc. are commonly used for low-level determination of rare-earth ions in solution.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Nd(III) Sensors: Novel Macrocyclic Compounds for Potentiometric Determination of Neodymium

Singh

Jain

2010

Electroanalysis

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Conductometric studies on the complexation properties of two newly synthesized lariat ethers viz 1,5-di(cyanoethane)-2,4 : 7,8 : 13,14-tribenzo-1,5-diaza-9,12-dioxacyclopentadeca-2,7,13-triene (L 1 ) and 1,5-di(cyanoethane)-2,3,4-pyridine-7,8 : 13,14-dibenzo-1,3,5-triaza-9,12-dioxa cyclopentadeca-2,7,13-triene (L 2 ) towards various metal ions in acetonitrile solutions revealed the formation of 1 : 1 ligand metal complexation. These compounds were explored as neutral ionophores for the fabrication of Nd 3þ selective and sensitive membrane coated graphite electrodes (CGEs). Among all the electrodes prepared, CGEs with membrane composition L 1 (5%) : NaTPB(3%) : NPOE (57%) : PVC (35%) and L 2 (5%) : NaTPB(3%) : NPOE (53%) : PVC (39%) showed best performance. Both the electrodes showed Nernstian response towards Nd 3þ ions over a wide concentration range with detection limits 3.8 Â 10 À8 mol L À1 and 1.6 Â 10 À8 mol L À1 respectively. These electrodes showed a fast response time of < 15 s and could be used over a period of three months without significant divergence in their characteristics. The proposed electrodes revealed very good selectivity for Nd 3þ ions over several ions. However, higher concentration of Co 2þ , La 3þ , Pr 3þ and Yb 3þ caused some interference. The potentiometric response of these electrodes was excellent in the range of pH 3.5 to 7.6 and they could tolerate up to 20% (v/v) nonaqueous media in the test solutions. These electrodes were used successfully as indicator electrode in the potentiometric titration of Nd 3þ against EDTA and also in the quantitative determination of Nd 3þ ions from binary mixtures and water samples.

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Radiochemical Determination of Total Rare Earths by Liquid-Liquid Extraction

Cited by 30 publications

References 7 publications

A Novel Approach for the Direct Determination of 28 Analytes in a Ce Matrix Without Chemical Separation Using CCD Detector-based ICP-AES

A Novel Approach for the Direct Determination of 28 Analytes in a Ce Matrix Without Chemical Separation Using CCD Detector-based ICP-AES

Potentiometric Sensors for Pr(III) Based on N-N᾽o‐Phenylene‐bis(salicylideneimine) Using Epoxy Resin and PVC as Binding Materials

Highly Selective Nd(III) Sensors: Novel Macrocyclic Compounds for Potentiometric Determination of Neodymium

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