scholarly journals Ultra-trace element analysis of human follicular fluid by ICP-MS/MS: pre-analytical challenges, contamination control, and matrix effects

2019 ◽  
Vol 34 (4) ◽  
pp. 741-752 ◽  
Author(s):  
Aubrey L. Galusha ◽  
Aubreian C. Haig ◽  
Michael S. Bloom ◽  
Pamela C. Kruger ◽  
Alexandra McGough ◽  
...  
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Follicular Fluid ◽  
Matrix Effects ◽  
Trace Element Analysis ◽  
Element Analysis ◽  
Human Follicular Fluid ◽  
Contamination Control ◽  
Icp Ms ◽  
Ultra Trace

Human follicular fluid was collected from 56 women undergoing IVF treatment and analyzed for 11 (ultra-)trace elements using a “dilute and shoot” ICP-MS/MS method.

TRACE ELEMENT ANALYSIS OF PYRITES IN GAS SHALES BY LASER ABLATION ICP-MS: IMPLICATIONS FOR MOBILITY

2017 ◽  
Author(s):  
Amy K. Plechacek ◽  
◽  
Madeline E. Schreiber ◽  
John A. Chermak ◽  
Tracy L. Bank
Keyword(s):  
Laser Ablation ◽  
Trace Element ◽  
Trace Element Analysis ◽  
Element Analysis ◽  
Icp Ms ◽  
Gas Shales

Application of LA-ICP-MS trace-element analysis for precious metal deportment: a case study of the Kevitsa mine, Finland

2017 ◽  
Vol 29 (4) ◽  
pp. 635-644 ◽  
Author(s):  
Louis J Cabri ◽  
Michelle Kelvin ◽  
Zhaoping Yang ◽  
Simon E Jackson ◽  
Okan Altun
Keyword(s):  
Trace Element ◽  
Precious Metal ◽  
Trace Element Analysis ◽  
Element Analysis ◽  
Icp Ms

Trace Element Analysis of Rough Diamond by LA-ICP-MS: A Case of Source Discrimination?*,†

2010 ◽  
Vol 55 (6) ◽  
pp. 1443-1456 ◽  
Author(s):  
Claude Dalpé ◽  
Pierre Hudon ◽  
David J. Ballantyne ◽  
Darrell Williams ◽  
Denis Marcotte
Keyword(s):  
Trace Element ◽  
Trace Element Analysis ◽  
Element Analysis ◽  
Source Discrimination ◽  
Icp Ms

scholarly journals Parental magma composition of the Main Zone of the Bushveld Complex: Evidence from in-situ LA-ICP-MS trace element analysis of silicate minerals in the cumulate rocks

2020 ◽  
Author(s):  
Shenghong Yang ◽  
Wolfgang D. Maier ◽  
Belinda Godel ◽  
Sarah-Jane Barnes ◽  
Eero Hanski ◽  
...  
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Bushveld Complex ◽  
Trace Element Analysis ◽  
Parental Magma ◽  
Main Zone ◽  
Element Analysis ◽  
Silicate Minerals ◽  
Incompatible Elements

<p>In-situ trace element analysis of cumulus minerals may provide a clue to the parental magma from which the minerals crystallized. However, this is hampered by effects of the trapped liquid shift (TLS). In the Main Zone (MZ) of the Bushveld Complex, the Ti content in plagioclase grains shows a clear increase from core to rim, whereas most other elements (e.g., rare earth elements (REEs), Zr, Hf, Pb) do not. This is different from the prominent intra-grain variation of all trace elements in silicate minerals in mafic dikes and smaller intrusion, which have a faster cooling rate. We suggest that crystal fractionation of trapped liquid occurred in the MZ of Bushveld and the TLS may have modified the original composition of the cumulus minerals for most trace elements except Ti during slow cooling. Quantitative model calculations suggest that the influence of the TLS depends on the bulk partition coefficient of the element. The effect on highly incompatible elements is clearly more prominent ­­than on moderately incompatible and compatible elements because of different concentration gradients between cores and rims of cumulate minerals. This is supported by the following observations in the MZ of Bushveld: 1) positive correlation between Cr, Ni and Mg# of clinopyroxene and orthopyroxene, 2) negative correlation between moderately incompatible elements (e.g., Mn and Sc in clinopyroxene and orthopyroxene, Sr, Ba, Eu in plagioclase), but 3) poor correlation between highly incompatible elements and Mg# of clinopyroxene and orthopyroxene or An# of plagioclase. Modeling suggests that the extent of the TLS for a trace element is also dependent on the initial fraction of the primary trapped liquid, with strong TLS occurring if the primary trapped liquid fraction is high. This is supported by the positive correlation between highly incompatible trace element abundances in cumulus minerals and whole-rock Zr contents.</p><p>We have calculated the composition of the parental magma of the MZ of the Bushveld Complex. The compatible and moderately incompatible element contents of the calculated parental liquid are generally similar to those of the B3 marginal rocks, but different from the B1 and B2 marginal rocks. For the highly incompatible elements, we suggest that the use of the sample with the lowest whole-rock Zr content and the least degree of TLS is the best approach to obtain the parental magma composition. Based on calculation, we propose that a B3 type liquid is the most likely parental magma to the MZ of the Bushveld Complex.</p>

scholarly journals Preface

2006 ◽  
Vol 78 (1) ◽  
pp. viii
Author(s):  
Michael Bickel
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Trace Element Analysis ◽  
The Body ◽  
Research Centre ◽  
Food Contaminants ◽  
Joint Research ◽  
Element Analysis ◽  
Fortified Food ◽  
Animal Metabolism

Trace elements may have different functions in human and animal metabolism: some are toxic (e.g., Hg), others are essential to maintain good health (e.g., Ca), or they can be essential but also toxic, depending on the concentration in the body or in parts thereof (e.g., Se).The importance of various aspects of trace elements in relation to food is steadily increasing in the perception of the consumer and the respective authorities: food contaminants, essential and toxic elements, bioavailability and speciation, nutritional value and fortified food, reliable measurement of contents, etc. In addition, through the many minor and major food-related incidents during recent years the consumer is becoming more concerned about the quality and safety of food. As a result, research and development efforts in this area have also been increased and/or been redirected.TEF-2 was organized in Brussels 7-8 October 2004 by the Institute of Reference Materials and Measurements of the Joint Research Centre of the European Commission, with the support of the Department of Food Analysis, Institute of Agricultural and Food Biotechnology of the University of Warzaw, Poland and the Centre National de la Recherche Scientifique, France. It was carried through under the auspices of IUPAC.The objectives laid down for the symposium were- presenting state-of-the-art analytical methods for the enforcement of legal limits of trace elements in food;- disseminating new ideas and findings within the scientific community;- providing a forum for the exchange of new knowledge and experience between R&D, authorities, and industry; and- bringing together experts in the field with newcomers.TEF-2 was attended by 93 participants from 60 different institutions in 23 countries. It consisted of 26 lectures and 56 posters, structured according to the following four main topics:- trace elements in the food chain (from the environment to shelf product) including the effects of processing and of legislation- trace element bioavailability-toxicological and nutritional aspects- fortified food and supplementation legislation, manufacturing and labeling, standards- advances in trace element analysis in food matricesIt was emphasized that the field of trace elements in food is a lively research area, which generates interest and involvement from researchers, authorities, and industry, of course triggered and nurtured by the equally high interest of the consumer. A selection of the invited contributions to TEF-2 is presented in the subsequent seven papers in this issue.The importance of scientific exchange in this field was, again, recognized during TEF-2. Therefore, the continuation of this series of conferences was discussed, and the venue for the subsequent TEF-3 was decided. It will be organized by R. Lobinski of CNRS in Pau, France, at the beginning of October 2008.Michael BickelConference Editor

Trace-Element Analysis in Clinical Chemistry

1971 ◽  
Vol 17 (6) ◽  
pp. 461-474 ◽  
Author(s):  
Henry A Schroeder ◽  
Alexis P Nason
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Clinical Chemistry ◽  
Trace Element Analysis ◽  
Present Knowledge ◽  
Human Metabolism ◽  
Element Analysis ◽  
Toxic Trace Elements ◽  
Essential Trace Elements ◽  
Clinical Conditions

Abstract Present knowledge of human bodily contents and concentrations in blood, urine, and hair of 11 essential trace elements and 17-22 nonessential inert or toxic trace elements is reviewed and summarized. Analyses of trace elements are applicable as diagnostic aids and indices for therapy in a number of clinical conditions. Techniques are not difficult, and analyses will probably become more or less routine for many diseases in which primary or secondary abnormalities are manifest. Trace elements play fundamental roles in human metabolism.

Multipoint Background Analysis: Gaining Precision and Accuracy in Microprobe Trace Element Analysis

2019 ◽  
Vol 25 (1) ◽  
pp. 30-46 ◽  
Author(s):  
Julien M. Allaz ◽  
Michael L. Williams ◽  
Michael J. Jercinovic ◽  
Karsten Goemann ◽  
John Donovan
Keyword(s):  
Mass Spectrometry ◽  
Trace Elements ◽  
Trace Element ◽  
Spectral Region ◽  
Trace Element Analysis ◽  
Background Intensity ◽  
Element Analysis ◽  
Accuracy And Precision ◽  
Background Measurement ◽  
Background Curvature

AbstractElectron microprobe trace element analysis is a significant challenge. Due to the low net intensity of peak measurements, the accuracy and precision of such analyses relies critically on background measurements, and on the accuracy of any pertinent peak interference corrections. A linear regression between two points selected at appropriate background positions is a classical approach for electron probe microanalysis (EPMA). However, this approach neglects the accurate assessment of background curvature (exponential or polynomial), and the presence of background interferences, a hole in the background, or an absorption edge can dramatically affect the results if underestimated or ignored. The acquisition of a quantitative wavelength-dispersive spectrometry (WDS) scan over the spectral region of interest remains a reasonable option to determine the background intensity and curvature from a fitted regression of background portions of the scan, but this technique can be time consuming and retains an element of subjectivity, as the analyst has to select areas in the scan which appear to represent background. This paper presents a new multi-point background (MPB) method whereby the background intensity is determined from up to 24 background measurements from wavelength positions on either side of analytical lines. This method improves the accuracy and precision of trace element analysis in a complex matrix through careful regression of the background shape, and can be used to characterize the background over a large spectral region covering several elements to be analyzed. The overall efficiency improves as systematic WDS scanning is not required to assess background interferences. The method is less subjective compared to methods that rely on WDS scanning, including selection of two interpolation points based on WDS scans, because “true” backgrounds are selected through an exclusion method of possible erroneous backgrounds. The first validation of the MPB method involves blank testing to ensure the method can accurately measure the absence of an element. The second validation involves the analysis of U-Th-Pb in several monazite reference materials of known isotopic age. The impetus for the MPB method came from efforts to refine EPMA monazite U-Th-Pb dating, where it was recognized that background errors resulting from interference or strong background curvature could result in errors of several tens of millions of years on the calculated date. Results obtained on monazite reference materials using two different microprobes, a Cameca SX-100 Ultrachron and a JEOL JXA-8230, yield excellent agreement with ages obtained by isotopic methods (Thermal Ionization Mass Spectrometry [TIMS], Sensitive High-Resolution Ion MicroProbe [SHRIMP], or Secondary Ion Mass Spectrometry [SIMS]). Finally, the MPB method can be used to model the background over a large spectrometer range to improve the accuracy of background measurement of minor and trace elements acquired on a same spectrometer, a method called the shared background measurement. This latter significantly improves the accuracy of minor and trace element analysis in complex matrices, as demonstrated by the analysis of Rare Earth Elements (REE) in REE-silicates and phosphates and of trace elements in scheelite.

Sign in / Sign up

Export Citation Format

Share Document