Interlaboratory and Interinstrumental Spectrochemical Precision: Comparison of dc Carbon Arc Optical Emission Spectrographic, Atomic Absorption, and X-ray Fluorescence Spectrometric Procedures

1976 ◽  
Vol 30 (3) ◽  
pp. 335-343 ◽  
Author(s):  
Isaac B. Brenner ◽  
L. Gleit ◽  
A. Harel
Keyword(s):  
Atomic Absorption ◽  
Optical Emission ◽  
X Ray ◽  
Minor Elements ◽  
Accuracy And Precision ◽  
Spectrographic Method ◽  
Carbon Arc ◽  
The Common ◽  
Trace And Minor Elements

A cooperative investigation has been performed to test long-term interlaboratory and interinstrumental accuracy and precision of a dc carbon arc optical emission spectrographic method for determining the common trace and minor elements in silicate rocks and minerals. Comparisons are made with determinations by atomic absorption and X-ray fluorescence spectrometric procedures to indicate agreement or bias of the analytical results, and the presence of systematic errors.

X-ray fluorescence study of the concentration of selected trace and minor elements in human brain tumours

2015 ◽  
Vol 114 ◽  
pp. 52-57 ◽  
Author(s):  
Aleksandra Wandzilak ◽  
Mateusz Czyzycki ◽  
Edyta Radwanska ◽  
Dariusz Adamek ◽  
Kalotina Geraki ◽  
...  
Keyword(s):  
Human Brain ◽  
Brain Tumours ◽  
Fluorescence Study ◽  
X Ray ◽  
Minor Elements ◽  
Human Brain Tumours ◽  
Trace And Minor Elements

Analysis of the Major Constituents in Venezuelan Laterites; A Comparison of Atomic Absorption, X-ray Fluorescence, and Classical Methods

1980 ◽  
Vol 34 (1) ◽  
pp. 39-43 ◽  
Author(s):  
J. J. Labrecque ◽  
H. Schorin
Keyword(s):  
Sample Preparation ◽  
Atomic Absorption ◽  
Fluorescence Technique ◽  
Absorption Method ◽  
Complete Sample ◽  
X Ray ◽  
Atomic Absorption Method ◽  
Decomposition Step ◽  
Accuracy And Precision ◽  
Sample Dissolution

A comparison of an atomic absorption method and x-ray fluorescence procedure for the analysis of the major constituents in Venezuelan laterites from Serranía de los Guaicas and bauxites is presented. These methods are also compared to other classical methods. The accuracy and precision of both these techniques are within the requirements needed. The HF-H3BO3 decomposition step is a disadvantage in the atomic absorption method because of the uncertainty in a complete sample dissolution of bauxites, but it has been shown to be suitable for Venezuelan laterites. The x-ray fluorescence technique presented herein is also limited because of its sample preparation, i.e., the use of expensive Pt-Au crucibles and the large quantity of sample needed.

Seasonal variation in trace and minor elements in Brazilian honey by total reflection X-ray fluorescence

2015 ◽  
Vol 187 (3) ◽  
Author(s):  
Roberta de Oliveira Resende Ribeiro ◽  
Eliane Teixeira Mársico ◽  
Carla da Silva Carneiro ◽  
Julia Siqueira Simoes ◽  
Micheli da Silva Ferreira ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Total Reflection ◽  
X Ray ◽  
Minor Elements ◽  
Trace And Minor Elements

Quantitative Determination of Ga, Zn, Cu, Hi, Mn, and Cr by X-Ray Fluorescence in Laterites and Bauxites Using Two Evaluation Methods

1981 ◽  
Vol 25 ◽  
pp. 127-131
Author(s):  
Hasso Schorin
Keyword(s):  
Quantitative Determination ◽  
Chemical Weathering ◽  
Limit Of Detection ◽  
Standard Addition ◽  
Standard Addition Method ◽  
Addition Method ◽  
X Ray ◽  
Minor Elements ◽  
Trace And Minor Elements

Laterites and bauxites are residual products derived from a wide variety of rocks by intensive chemical weathering under strongly oxidizing and leaching conditions. Generally the main constituents of these residues are Fe, Al and Ti present in form of hydroxides and/or oxides. The content of silica depends on the thoroughness of the leaching process. The behaviour of trace and minor elements as Ga, Zn, Cu, Ni, Mn and Cr during the laterite/bauxite formation is not yet well established. Precise and accurate analyses of these elements are a prerequisite for such investigations. In this paper the standard addition method is presented and the results are compared with those obtained by calibration standardization. The accuracy and the precision of the methods as well as the distinction limit and the limit of detection for each element are given.

The Present State of X-Ray Spectrometry

1980 ◽  
Vol 24 ◽  
pp. 329-332
Author(s):  
J. L. de Vries ◽  
N. V. Philips
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Present State ◽  
Optical Emission ◽  
Absorption Spectrometry ◽  
The Other ◽  
Plasma Sources ◽  
X Ray

If we want to evaluate the present state of X.R.S., we should do this in perspective with other methods, e.g. Optical Emission and Atomic Absorption Spectrometry.One way to compare would be to estimate the number of papers published or given at conferences on these three methods. Table 1 gives a survey af some meetings. It is evident that X.R.S. is less talked about than the other methods. The rejuvenation of OES, thanks to the Plasma sources, can also clearly be seen.

Determination of microquantities of Fe, Mg, Ca, Cu, and Pb in lanthanoid minerals by atomic absorption spectrophotometry

1980 ◽  
Vol 45 (3) ◽  
pp. 715-719
Author(s):  
Anna Sopková ◽  
Katarína Radváková
Keyword(s):  
Atomic Absorption ◽  
Anion Exchanger ◽  
Atomic Absorption Spectrophotometry ◽  
Minor Elements ◽  
Absorption Spectrophotometry ◽  
Model Solutions ◽  
Accuracy And Precision ◽  
Calcium And Magnesium ◽  
Copper Lead

The decomposition of two lanthanoid minerals, viz fluorocarbonate bastnasite and phosphate monazite, is described. Iron present in the solution obtained is removed on anion exchanger. Atomic absorption spectrophotometry was applied to the determination of the minor elements present in the mineral, viz. copper, lead, calcium and magnesium. The measurement conditions for the determination of these elements in microquantities were established by using model solutions, and the accuracy and precision of determination were evaluated.

scholarly journals Synchrotron microanalytical methods in the study of trace and minor elements in apatite

Mineralogia ◽  
2008 ◽  
Vol 39 (1-2) ◽  
pp. 31-40 ◽  
Author(s):  
John Rakovan ◽  
Yun Luo ◽  
Olaf Borkiewicz
Keyword(s):  
Analytical Techniques ◽  
Photon Flux ◽  
High Temporal Resolution ◽  
Phase Identification ◽  
X Ray Diffraction ◽  
Edge Structure ◽  
X Ray ◽  
Minor Elements ◽  
Trace And Minor Elements ◽  
X Ray Absorption

Synchrotron microanalytical methods in the study of trace and minor elements in apatiteSynchrotron X-ray facilities have the capability for numerous microanalytical methods with spatial resolutions in the micron to submicron range and sensitivities as low as ppm to ppb. These capabilities are the result of a high X-ray brilliance (many orders of magnitude greater than standard tube and rotating anode sources); a continuous, or white, spectrum through the hard X-ray region; high degrees of X-ray columniation and polarization; and new developments in X-ray focusing methods. The high photon flux and pulsed nature of the source also allow for rapid data collection and high temporal resolution in certain experiments. Of particular interest to geoscientists are X-ray fluorescence microprobes which allow for numerous analytical techniques including X-ray fluorescence (XRF) analysis of trace element concentrations and distributions; X-ray absorption spectroscopy (XAS) for chemical speciation, structural and oxidation state information; X-ray diffraction (XRD) for phase identification; and fluorescence microtomography (CMT) for mapping the internal structure of porous or composite materials as well as elemental distributions (Newville et al. 1999; Sutton et al. 2002; Sutton et al. 2004).We have employed several synchrotron based microanalytical methods including XRF, microEXAFS (Extended X-ray Absorption Fine Structure), microXANES (X-ray Absorption Near Edge Structure) and CMT for the study of minor and trace elements in apatite (and other minerals). We have also been conducting time resolved X-ray diffraction to study nucleation of and phase transformations among precursor phases in the formation of apatite from solution at earth surface conditions. Summaries of these studies are given to exemplify the capabilities of synchrotron microanalytical techniques.

Solid sampling analysis of a Mg alloy using electrothermal vaporization inductively coupled plasma optical emission spectrometry

2017 ◽  
Vol 32 (10) ◽  
pp. 2041-2045 ◽  
Author(s):  
G. L. Scheffler ◽  
Y. Makonnen ◽  
D. Pozebon ◽  
D. Beauchemin
Keyword(s):  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Mg Alloy ◽  
Emission Spectrometry ◽  
Electrothermal Vaporization ◽  
Inductively Coupled ◽  
Minor Elements ◽  
Plasma Optical Emission Spectrometry ◽  
Trace And Minor Elements

ETV-ICPOES is applied to the fast determination of trace and minor elements in a Mg alloy.

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