Tantalum isotope ratio measurements and isotope abundances determined by MC-ICP-MS using amplifiers equipped with 1010, 1012and 1013Ohm resistors

2017 ◽  
Vol 32 (1) ◽  
pp. 130-143 ◽  
Author(s):  
M. Pfeifer ◽  
N. S. Lloyd ◽  
S. T. M. Peters ◽  
F. Wombacher ◽  
B.-M. Elfers ◽  
...  
Keyword(s):  
Isotope Ratio ◽  
Isotope Composition ◽  
Icp Ms ◽  
Extraterrestrial Materials ◽  
Isotope Ratio Measurements

We revise the tantalum isotope composition and present a protocol to search for anomalies in geological and extraterrestrial materials.

Cadmium isotope ratio measurements in environmental matrices by MC-ICP-MS

2014 ◽  
Vol 29 (9) ◽  
pp. 1570-1584 ◽  
Author(s):  
Nicola Pallavicini ◽  
Emma Engström ◽  
Douglas C. Baxter ◽  
Björn Öhlander ◽  
Johan Ingri ◽  
...  
Keyword(s):  
Pilot Study ◽  
Sample Preparation ◽  
Environmental Samples ◽  
Isotope Ratio ◽  
Isotope Composition ◽  
Environmental Matrices ◽  
Factors Affecting ◽  
Matrix Separation ◽  
Icp Ms ◽  
Isotope Ratio Measurements

Various stages of an analytical method for high-precision cadmium (Cd) isotope ratio measurements by MC-ICP-MS (sample preparation, matrix separation, instrumental analysis and data evaluation) were critically evaluated and optimized for carbon-rich environmental samples. The method was used in a pilot study focusing on the assessment of factors affecting Cd isotope composition in birch leaves.

scholarly journals Gd Matrix Effects on Eu Isotope Fractionation in Geological Rocks Using MC-ICP-MS: Optimizing Europium Isotope Ratio Measurements in Geological Samples

2021 ◽  
Author(s):  
Seung-Gu Lee ◽  
Tsuyoshi Tanaka
Keyword(s):  
Isotope Ratio ◽  
Isotope Fractionation ◽  
Matrix Effects ◽  
Internal Standard ◽  
Geological Samples ◽  
Chemical Reagent ◽  
True Value ◽  
Icp Ms ◽  
Silicate Rocks ◽  
Isotope Ratio Measurements

<p></p><p>Eu has only two isotopes (151Eu and 153 Eu). Eu and Gd are one of the rare earth elements that are very difficult to completely separate from each other. Eu isotope ratio can be determined by MC-ICP-MS using internal Sm or Gd spikes to correct for mass discrimination. NIST3117a ultrapure chemical reagent shows almost no Eu isotope fractionation regardless of the kind of normalization isotope pair. However, Eu isotope ratio in the silicate rocks was effected by Gd matrix during MC-ICP-MS measurement if a trace amount of Gd impurity remains in the purified Eu fraction. In this report, we tried to determine optimizing conditions for precise and accurate Europium isotope ratio measurements in geological samples using MC-ICP-MS. The pure Eu fraction with almost no Gd matrix separated from geological samples and NIST3117a ultrapure chemical reagent show almost same degree of Eu isotope fractionation regardless of the kind of normalization isotope pair. However, Eu isotope ratio in the silicate rocks was effected by Gd matrix during MC-ICP-MS measurement using if 154 Gd interference relative to 154 Sm as internal standard is more than ca. 0.1%. Particularly, highly fractionated granite and high silica volcanic rock with extremely low Eu concentration compared to Gd require high – purity Eu separation with a high recovery rate to obtain the true value of the Eu isotope fractionation in the geological rocks. <br></p><br><p></p>

Trace elements and Pb isotope composition of annual tree rings and pine needles growing in highly industrialized region in southern Poland

2021 ◽  
Author(s):  
Barbara Sensuła ◽  
Nathalie Fagel
Keyword(s):  
Trace Elements ◽  
Chemical Composition ◽  
Tree Rings ◽  
Wet Deposition ◽  
Isotope Ratio ◽  
Isotope Composition ◽  
Pine Needles ◽  
Pb Isotope ◽  
Southern Poland ◽  
Icp Ms

&lt;p&gt;Trees can provide annual records of ecosystem changes connected with human activity over several decades. These changes can be recorded in the pattern of variation of tree-rings widths and in the variation in the elemental composition of wood. Analysis of trace metal pollution is based on the assumption that element concentrations in tree foliage and tree rings represent element availability in the environment.&lt;/p&gt;&lt;p&gt;We determined the chemical composition of pine needles and annual tree rings to monitor environmental contamination in an urban forest environment in the most industrialized part of southern Poland.&lt;/p&gt;&lt;p&gt;The concentrations of trace elements (Cr, Co, Ni, Cu, Zn, Pb) and the Pb isotope composition were measured in needles from&amp;#160;Pinus sylvestris&amp;#160;L. growing in nine urban forests near five factories. Trace elemental concentration and Pb isotope ratio were determined by ICP-MS and MC-ICP-MS, respectively. The needles were characterized based on the concentrations of Cr, ranging from 0.05 to 0.7 mg/kg, Co, from 0.005 to 0.075 mg/kg, Ni, from 0.12 to 0.66 mg/kg, Cu, from 0.49 to 1.0 mg/kg, Zn, from 3.9 to 14 mg/kg, and Pb, from 0.06 to 0.53 mg/kg. The&amp;#160;&lt;sup&gt;208&lt;/sup&gt;Pb/&lt;sup&gt;206&lt;/sup&gt;Pb ratio ranged from 2.08 to 2.11 and the&amp;#160;&lt;sup&gt;206&lt;/sup&gt;Pb/&lt;sup&gt;207&lt;/sup&gt;Pb ratio between 1.15 and 1.17. The heterogeneity of Pb isotope ratio indicates that there are different sources affecting the Pb isotopic composition of pine needles (Sensu&amp;#322;a et al., 2021).&lt;/p&gt;&lt;p&gt;In one of the investigated site, a radial trace-element profiles were determined by Laser Ablation Inductively Coupled Plasma-Mass Spectrometry (Laser ablation: New Wave Research UP-193 FX Fast Excimer, ICP-MS: Thermo Scientific X-Series2 with CCT -Collision Cell Technology) at Royal Museum for Central Africa (Belgium). LA-ICP-MS provides a repeatable, minimally destructive, sensitive method for determining many elements in wood tissue, with relatively high spatial resolution.Temporal variations of element concentration (median) in annual tree-rings of pines were compared with time series of wet deposition of pollutant and air pollutant concentration in the investigated area.&amp;#160;The similar trends of magnitudes changes can be observed between analysed elements concentration (Na, Mg, Fe, Ni, Zn) and total wet deposition of these elements in the environment during vegetation period or these elements concentration in the rain (Sensu&amp;#322;a et al. 2017).&amp;#160;&lt;/p&gt;&lt;p&gt;Different space-time patterns of element accumulation in pine needles and annaul tree rings were observed. The variation in isotopic composition reflects a mix between different anthropogenic sources.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;References:&lt;/p&gt;&lt;p&gt;Sensu&amp;#322;a, B., Wilczy&amp;#324;ski, S., Monin, L., Allan, M., Pazdur, A., &amp; Fagel, N. (2017). Variations of tree ring width and chemical composition of wood of pine growing in the area nearby chemical factories,&amp;#160;Geochronometria,&amp;#160;44(1), 226-239. doi:&amp;#160;https://doi.org/10.1515/geochr-2015-0064&lt;/p&gt;&lt;p&gt;Sensu&amp;#322;a, B., Fagel, N., &amp; Michczy&amp;#324;ski, A. (2021). Radiocarbon, trace elements and pb isotope composition of pine needles from a highly industrialized region in southern Poland.&amp;#160;Radiocarbon,&amp;#160;1-14. doi:10.1017/RDC.2020.132&lt;/p&gt;

scholarly journals Copper Isotope Ratio Measurements of Cu-Dominated Minerals Without Column Chromatography Using MC-ICP-MS

2020 ◽  
Vol 8 ◽  
Author(s):  
Yan Zhang ◽  
Zhian Bao ◽  
Nan Lv ◽  
Kaiyun Chen ◽  
Chunlei Zong ◽  
...  
Keyword(s):  
Column Chromatography ◽  
Isotope Ratio ◽  
Copper Isotope ◽  
Icp Ms ◽  
Isotope Ratio Measurements

Strategies for isotope ratio measurements with a double focusing sector field ICP-MS

1999 ◽  
Vol 364 (5) ◽  
pp. 495-498 ◽  
Author(s):  
M. Hamester ◽  
D. Wiederin ◽  
J. Wills ◽  
W. Kerl ◽  
C. B. Douthitt
Keyword(s):  
Isotope Ratio ◽  
Icp Ms ◽  
Double Focusing ◽  
Isotope Ratio Measurements
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