Study on 50 MHz ICP Torch with Medium Resolution Spectrometer. Determination of Rare Earth Elements in Complicated Matrices

1993 ◽  
Vol 58 (5) ◽  
pp. 1013-1041
Author(s):  
Viktor Kanický ◽  
Jiří Toman ◽  
Vítězslav Otruba ◽  
Lumír Sommer
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Spectral Lines ◽  
Icp Oes ◽  
Matrix Interferences ◽  
Medium Resolution ◽  
Icp Torch ◽  
Resolution Spectrometer ◽  
Optimum Working

ICP-OES is a suitable method for the determination of R.E.E. (rare earth elements),which exhibits advantages in the absence of interferences of evaporation, low detection limits and a great linear range of calibration graphs. A spectrometer having spectral bandwidth (SBW) 30 pm with 50 MHz ICP source were used. Optimum working conditions resulted from detailed studies of axial intensity distributions. Differences in axial intensity distribution were evident when compared with usual 27.12 MHz ICP sources. Matrix interferences of alkaline salts and acids have been evaluated and the optimum spectral lines selected respecting mutual spectral interferences of R.E.E.

Method validation and uncertainty for the determination of rare earth elements, yttrium, thorium and phosphorus in monazite samples by ICP-OES

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Inductively Coupled Plasma ◽  
Simple Procedure ◽  
Optical Emission ◽  
Icp Oes ◽  
Limit Of Quantification ◽  
Inductively Coupled ◽  
Relative Standard

A method is described for the inductively coupled plasma optical emission spectrometric (ICP-OES) determination of rare earth elements (REE), yttrium (Y), thorium (Th) and phosphorus (P) in monazite samples. Sample preparation was carried out by fuming with sulphuric acid followed by fluoride fusion of the remaining residue. The method was validated using the single laboratory approach by assessment of analytical performance characteristics like specificity, linearity, range, accuracy and precision. Spectral interferences were observed in the case of some heavy REE (Ho,Er,Tm) by light REE (Nd) and correction factors were deduced and applied. The limit of quantification, instrument linearity and the method range were evaluated. Relative standard deviation (RSD) values ranging from 2.6 to 10.2 % were obtained for repeatability studies and RSD values ranging from 1.7 to 11.1% for intra-lab reproducibility studies. Accuracy was established by application to a monazite certified reference material (CRM) and also through comparison of results obtained by present method with those obtained by an alternate method. The validation results were compliant with the acceptance criteria for the various parameters assessed. A simple procedure has been described for the estimation of associated measurement uncertainty using the GUM “bottom-up” modelling approach and results presented in this paper. The validated method was applied to the determination of REE, Y, Th and P in some monazite samples from India.

Development of a simple and robust microwave-assisted decomposition method for the determination of rare earth elements in coal fly ash by ICP-OES

2017 ◽  
Vol 9 (13) ◽  
pp. 2031-2040 ◽  
Author(s):  
M. V. Balarama Krishna ◽  
G. Venkateswarlu ◽  
D. Karunasagar
Keyword(s):  
Rare Earth ◽  
Fly Ash ◽  
Rare Earth Elements ◽  
Decomposition Method ◽  
Coal Fly Ash ◽  
Icp Oes ◽  
Step Method ◽  
Microwave Assisted ◽  
Assisted Decomposition

A novel two-step method based on hotplate treatment (HT) in combination with microwave-assisted decomposition (MWD) was developed for the determination of rare earth elements (REEs) in coal fly ash samples by ICP-OES.

Quantification of Pb, Cd and Hg in Waste Rare Earth Phosphors from Abandoned Fluorescent Lamps and Cathode Ray Tubes by ICP-OES

2016 ◽  
Vol 847 ◽  
pp. 272-280
Author(s):  
Xiao Fei Yin ◽  
Yu Feng Wu ◽  
Tie Yong Zuo
Keyword(s):  
Rare Earth ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Spectral Lines ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Plasma Atomic Emission Spectrometry ◽  
Simple Method ◽  
Fluorescent Lamps

A fast and simple method to allow routine analysis of waste phosphors was developed and fully validated. Pb, Hg in waste fluorescent lamps phosphors (WFP) and Pb, Cd in waste CRT phosphors (WCP) were quantified by inductively coupled plasma atomic emission spectrometry (ICP-OES). Analytical conditions, including choice of analytical spectral lines, sample dissolution methods and many other standards, were studied. Wavelengths of 220.353, 228.802, and 184.886 nm were selected as analytical lines for determination of Pb, Cd, and Hg respectively. Studies showed that, Nitric acid could be used for dissolving Cd and Hg, and alkali fusion method for Pb. Detection limits of Pb, Cd, and Hg found were 1.8, 0.3 and 3mg/kg respectively. The proposed method was used in determination of target elements in waste rare earth phosphors, giving values of recovery in the ranges of 96.5%-104%, 98.5%-105% for Pb, Hg in WFP, and 98%-104.5%, 98%-104.5% for Pb, Cd in WCP respectively, and values of RSD less than 8%. Also, influences by dilution factor, coexisting elements and HNO3 Concentration etc. were discussed in the paper.

Comparison of different spectral resolution ICP-OES spectrometers for the determination of rare earth elements

2019 ◽  
Vol 73 (12) ◽  
pp. 2913-2921 ◽  
Author(s):  
Barbora Ticová ◽  
Karel Novotný ◽  
Viktor Kanický
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Spectral Resolution ◽  
Icp Oes

Use of X-ray Fluorescence Analysis for the Determination of Rare Earth Elements

2016 ◽  
Vol 1 (9) ◽  
Author(s):  
Rainer Schramm
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Fluorescence Analysis ◽  
Solid Material ◽  
Spectral Lines ◽  
Energy Dispersive ◽  
X Ray ◽  
Reference Samples ◽  
Selection Of

AbstractX-ray fluorescence spectrometry (XRF) is a powerful tool for the analysis of solid material. That is the reason why the technique was applied for the determination of rare earth elements (REEs) since about 1970. At present, energy-dispersive XRF and wavelength-dispersive XRF are used for the analysis of pressed powder pellets or fused Li-borate beads containing REEs. The production of reliable results can only be achieved by careful optimization of the parameter, in particular the selection of spectral lines. The quantification is based on a calibration realized by using reference samples.

scholarly journals X-Ray Emission Spectrographic Analysis of Bastnaesite Rare Earths

1957 ◽  
Vol 1 ◽  
pp. 367-386 ◽  
Author(s):  
Farrell W. Lytle ◽  
James I. Botsford ◽  
Henry A. Heller
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Absolute Intensity ◽  
Spectral Lines ◽  
Special Technique ◽  
X Ray ◽  
Advantages And Disadvantages ◽  
Analysis Technique ◽  
Spectrographic Method

AbstractAn X-ray emission spectrographic method of analysis is presented for the determination, of rare earth elements in fractions obtained from bastnaesite ore. The method includes the determination of yttrium, thorium, lanthanum., and the rare earth elements in various complex mixtures. The analysis technique is based upon comparing the samples to synthetic standards approximating the composition of the samples. Working curves are plotted on an absolute intensity basis, with, no correction for background. Examples of working curves and the analyses of typical rare earth concentrates are included. The selection of spectral lines for the various sample matrices is discussed. A special technique is used for samples in which rapid hydration and carbonation occurred.By analyzing synthetic samples of known composition, the accuracy of the method was determined. The error of analysis was about 3 per cent of the amount present in the range from 5 to 100 per cent and about 7 per cent in the 0.2 to 5 per cent range. A maximum of about 40 samples per day may be analyzed for 7 elements each. The advantages and disadvantages of the method are discussed.

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