Multielement Determination of Rare Earth Elements by Liquid Chromatography/Inductively Coupled Plasma Atomic Emission Spectrometry

Sawatari, Hideyuki; Asano, Takaaki; Hu, Xincheng; Saizuka, Tomoo; Itoh, Akihide; Hirose, Akio

doi:10.1246/bcsj.68.898

Cited by 10 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7 Before the analysis, the rock and sediment samples were digested, as mentioned later. The analytical results are summarized in Table 4, together with the certified values.…”

Section: Chromatographic Retention Behaviors Of Major Elementsmentioning

confidence: 99%

“…The LC/ICP-AES measurement system, which was developed in the present laboratory, was used in the experiment in similar manner to the previous experiment. 7 The test solution for the chromatogram measurements was prepared so as to match the concentrations of the major elements with those in the digested rock sample solution, in which Li was also added, because LiBO 2 was used for fusion of the samples.…”

Section: Chromatographic Retention Behaviors Of Major Elementsmentioning

confidence: 99%

See 1 more Smart Citation

Multielement Determination of Rare Earth Elements in Geochemical Samples by Liquid Chromatography/Inductively Coupled Plasma Mass Spectrometry

Itoh

Hamanaka

et al. 1999

ANAL. SCI.

Self Cite

View full text Add to dashboard Cite

Recently, inductively coupled plasma mass spectrometry (ICP-MS) has been increasingly used for trace elements in various samples because ICP-MS generally provides much better detection limits by 2 -4 orders of magnitude for most elements.1 However, it is noted here that since matrix effects are often serious in ICP-MS, ICP-AES is still useful for the determination of major, minor and some trace elements, when the concentrations of these analyte elements are higher than 1 µg/ml in the analysis solution. In addition, ICP-AES provides better analytical precision than does ICP-MS. Thus, it is desirable to use ICP-MS and ICP-AES, depending on the concentration levels of the analyte elements as well as analytical purposes.The concentrations and distribution patterns of rare earth elements (REEs), for example in rock samples, generally provide important information about the geochemical evolution and origins of magmatic rocks. Thus, REEs in geological or geochemical samples, such as rocks, sediments and soils, have been determined by neutron activation analysis, inductively coupled plasma atomic emission spectrometry (ICP-AES), and thermal-ionization mass spectrometry. 1 The present authors previously reported on the determinations of REEs in rock samples 2,3 and rare earth ores 4 by conventional ICP-AES with pneumatic nebulization. In addition, we explored the combined LC (liquid chromatography)/ICP-AES system as the analytical method for the determination of REEs in rock samples and REE oxides, where a monochromator system for single-element detection 5,6 and a polychromator system for simultaneous multielement detection 7 were employed. In these LC/ICP-AES systems, the main purpose of using LC was to separate the coexisting diverse elements and REEs in rock and other samples so as to eliminate interelement spectral interferences.Recently, ion chromatography combined with ICP-MS was applied to the determination of REEs. 8 The present authors also reported a LC/ICP-MS system for the chromatographic determination of REEs.9 Since ICP-MS generally provides much better detection sensitivities for REEs than does ICP-AES 10,11 , the analytical results for REEs obtained by the LC/ICP-MS system appeared to be more reliable than those by the LC/ICP-AES system. 9,12 Thus, in the present experiment the determination of REEs in geological samples has been investigated in more detail by the LC/ICP-MS system. Furthermore, ICP-AES and the LC/ICP-AES system were also used for determining the matrix elements and for investigating the separation efficiencies of the matrix elements from REEs in the sample solutions. Waste and Emission Management, Nagoya University,, Japan **Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, , Japan ***Faculty of Education, Miyagi Institute of Education, Aramaki, Japan A system of liquid chromatography combined with inductively coupled plasma mass spectrometry (ICP-MS) has been applied to the determination of rare earth elements (REEs) in geochemical standard referenc...

show abstract

“…7 Before the analysis, the rock and sediment samples were digested, as mentioned later. The analytical results are summarized in Table 4, together with the certified values.…”

Section: Chromatographic Retention Behaviors Of Major Elementsmentioning

confidence: 99%

Section: Chromatographic Retention Behaviors Of Major Elementsmentioning

confidence: 99%

Multielement Determination of Rare Earth Elements in Geochemical Samples by Liquid Chromatography/Inductively Coupled Plasma Mass Spectrometry

Itoh

Hamanaka

et al. 1999

ANAL. SCI.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The complexes formed between lanthanide(III) ions and hydroxycarboxylic acids played an important role in the development of ion-exchange separation methods and the coordination chemistry of lanthanides. Citric acid was one of the first eluents used for the radiochemical and preparative chromatographic separations. , Lactic acid and particularly α-hydroxy-isobutyric acid have recently been used in analytical separations by ion exchange chromatography or capillary electrophoresis. − The successful use of these ligands for the separations has attracted considerable interest in the study of the equilibrium properties of the lanthanide(III) (Ln 3+ ) complexes. However, despite the detailed studies, the possible role of the alcoholic hydroxyl group in the complex formation has remained a disputed problem for a long time.…”

Section: Introductionmentioning

confidence: 99%

Equilibria and Structure of the Lanthanide(III)-2-hydroxy-1,3-diaminopropane-N,N,N‘,N‘-tetraacetate Complexes: Formation of Alkoxo-Bridged Dimers in Solid State and Solution

et al. 2006

View full text Add to dashboard Cite

The complex formed between 1,3-diamino-2-hydroxypropane-N,N,N',N'-tetraacetic acid (H4L-OH) and Nd3+ at pH 7.5 was found to be a dinuclear dimer in the solid state by X-ray crystallography. In the complex K4[Nd2(L-O)2(H2O)2].14H2O each ligand is coordinated to both Nd3+ atoms with an iminodiacetate group (the Nd3+-Nd3+ distance is 3.9283(8) A). The alcoholic OH groups are deprotonated, and the alkoxo oxygens are coordinated to both Nd3+ in a bridging position. The Nd3+ ions are nine-coordinated with one water molecule per Nd(III) ion in the inner sphere. The complex K4[Nd2(L-O)2(H2O)2].14H2O has an inversion center, and the space group is P1. Two of the K+ counterions are six-coordinated, while the other two K+ ions are eight-coordinated; polar polymeric water-K+ layers are formed between the apolar ligand layers via the bridging water molecules. The dinuclear dimer complexes are also present in aqueous solution. The proton relaxivities of the Gd3+ complex decrease with the increase of pH, and at pH > 6, the low relaxivity values indicate the probable absence of H2O in the inner sphere and the predominance of the eight-coordinated dimer species [Gd2(L-O)2].4- The results of ESI-TOF MS studies of the complexes of La3+, Nd3+, and Lu3+ proved the formation of dinuclear dimers in dilute (0.25 mM) solutions. pH-potentiometric titrations indicate the formation of complexes with 1:1 (Ln(L-OH)-, Ln(HL-OH), and Ln2(L-O)24-) and 2:1 (Ln2(L-O)+) metal-to-ligand ratios. The stability constants of the Ln(L-OH)- species increase from La3+ (log K = 10.19) to Lu3+ (log K = 14.08). The alcoholic OH group of the Ln(L-OH)- species dissociates at unusually low pH values. The pH range of dissociation shifts to lower and lower pH's with the increasing atomic number of the lanthanides. This pH range is about 4-7 for the La3+ complex and 1-4 for the Lu3+ complex. The results of 1D and 2D 1H and 13C NMR studies of the La3+ complex, the number and multiplicity of signals, and the values of coupling constants are in agreement with the dinuclear dimer structure of the complex in solution.

show abstract

Evaluation of sulfobetaine-type zwitterionic stationary phases for ion Chromatographic separation using water as a mobile phase

Umemura

Kamiya

Itoh

et al. 1997

Analytica Chimica Acta

View full text Add to dashboard Cite

Multielement Determination of Rare Earth Elements by Liquid Chromatography/Inductively Coupled Plasma Atomic Emission Spectrometry

Cited by 10 publications

References 20 publications

Multielement Determination of Rare Earth Elements in Geochemical Samples by Liquid Chromatography/Inductively Coupled Plasma Mass Spectrometry

Multielement Determination of Rare Earth Elements in Geochemical Samples by Liquid Chromatography/Inductively Coupled Plasma Mass Spectrometry

Equilibria and Structure of the Lanthanide(III)-2-hydroxy-1,3-diaminopropane-N,N,N‘,N‘-tetraacetate Complexes: Formation of Alkoxo-Bridged Dimers in Solid State and Solution

Evaluation of sulfobetaine-type zwitterionic stationary phases for ion Chromatographic separation using water as a mobile phase

Contact Info

Product

Resources

About