scholarly journals QEC -value determination for Na21→Ne21 and Mg23→Na23 mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at the CERN ISOLDE facility

2019 ◽  
Vol 100 (1) ◽  
Author(s):  
J. Karthein ◽  
D. Atanasov ◽  
K. Blaum ◽  
M. Breitenfeldt ◽  
V. Bondar ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Precision ◽  
Isolde Facility ◽  
Value Determination

scholarly journals THE BEGINNING OF THE IRON AGE AT ARSLANTEPE: A 14C PERSPECTIVE

Radiocarbon ◽  
2021 ◽  
pp. 1-19
Author(s):  
Federico Manuelli ◽  
Cristiano Vignola ◽  
Fabio Marzaioli ◽  
Isabella Passariello ◽  
Filippo Terrasi
Keyword(s):  
Mass Spectrometry ◽  
Bronze Age ◽  
High Precision ◽  
Iron Age ◽  
Accelerator Mass Spectrometry ◽  
Late Bronze Age ◽  
13Th Century ◽  
Historical Events ◽  
Preliminary Results ◽  
Archaeological Data

ABSTRACT The Iron Age chronology at Arslantepe is the result of the interpretation of Luwian hieroglyphic inscriptions and archaeological data coming from the site and its surrounding region. A new round of investigations of the Iron Age levels has been conducted at the site over the last 10 years. Preliminary results allowed the combination of the archaeological sequence with the historical events that extended from the collapse of the Late Bronze Age empires to the formation and development of the new Iron Age kingdoms. The integration into this picture of a new set of radiocarbon (14C) dates is aimed at establishing a more solid local chronology. High precision 14C dating by accelerator mass spectrometry (AMS) and its correlation with archaeobotanical analysis and stratigraphic data are presented here with the purpose of improving our knowledge of the site’s history and to build a reliable absolute chronology of the Iron Age. The results show that the earliest level of the sequence dates to ca. the mid-13th century BC, implying that the site started developing a new set of relationships with the Levant already before the breakdown of the Hittite empire, entailing important historical implications for the Syro-Anatolian region at the end of the 2nd millennium BC.

scholarly journals Quality Dating: A Well-Defined Protocol Implemented at ETH for High-Precision 14C-Dates Tested on Late Glacial Wood

Radiocarbon ◽  
2019 ◽  
Vol 62 (4) ◽  
pp. 891-899 ◽  
Author(s):  
Adam Sookdeo ◽  
Bernd Kromer ◽  
Ulf Büntgen ◽  
Michael Friedrich ◽  
Ronny Friedrich ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Tree Ring ◽  
High Precision ◽  
Accelerator Mass Spectrometry ◽  
Late Glacial ◽  
Tree Ring Chronology ◽  
Continuous Measurements ◽  
Calibration Curves

ABSTRACTAdvances in accelerator mass spectrometry have resulted in an unprecedented amount of new high-precision radiocarbon (14C) -dates, some of which will redefine the international 14C calibration curves (IntCal and SHCal). Often these datasets are unaccompanied by detailed quality insurances in place at the laboratory, questioning whether the 14C structure is real, a result of a laboratory variation or measurement-scatter. A handful of intercomparison studies attempt to elucidate laboratory offsets but may fail to identify measurement-scatter and are often financially constrained. Here we introduce a protocol, called Quality Dating, implemented at ETH-Zürich to ensure reproducible and accurate high-precision 14C-dates. The protocol highlights the importance of the continuous measurements and evaluation of blanks, standards, references and replicates. This protocol is tested on an absolutely dated German Late Glacial tree-ring chronology, part of which is intercompared with the Curt Engelhorn-Center for Archaeometry, Mannheim, Germany (CEZA). The combined dataset contains 170 highly resolved, highly precise 14C-dates that supplement three decadal dates spanning 280 cal. years in IntCal, and provides detailed 14C structure for this interval.

scholarly journals Application of high-precision isotope ratio monitoring mass spectrometry to identify the biosynthetic origins of proteins

2008 ◽  
Vol 10 (7) ◽  
pp. 1466-1469 ◽  
Author(s):  
Izydor Apostol ◽  
Paul D. Brooks ◽  
Antony J. Mathews
Keyword(s):  
Mass Spectrometry ◽  
High Precision ◽  
Isotope Ratio

Inorganic mass spectrometry

2018 ◽  
Vol 4 (3) ◽  
Author(s):  
Josefina Pérez-Arantegui ◽  
Francisco Laborda
Keyword(s):  
Mass Spectrometry ◽  
High Precision ◽  
Mass Spectrometric ◽  
Sample Introduction ◽  
Mass Separation ◽  
Analytical Technique ◽  
Good Spatial Resolution ◽  
Icp Ms ◽  
Analytical Properties ◽  
Mass Spectrometric Techniques

Abstract Inorganic mass spectrometry has been used as a well-known analytical technique to determine elemental/isotopic composition of very diverse materials, based on the different mass-to-charge ratios of the ions produced in a specific source. In this case, two mass spectrometric techniques are explained and their analytical properties discussed: inductively coupled plasma mass spectrometry (ICP-MS) and thermal ionisation mass spectrometry (TIMS), since they are the most used in art and archaeological material studies. Both techniques combine advantageous analytical properties, like low detection limits, low interferences and high precision. The use of laser ablation as sample introduction system in ICP-MS allows to avoid sample preparation and to perform good spatial-resolution analysis. The development of new instruments, improving the mass separation and the detection of the ions, specially multicollection detectors, results in high-precision isotopic analysis. A summary of the important applications of these mass spectrometric techniques to the analysis of art and archaeological materials is also highlighted.

A new method for TIMS high precision analysis of Ba and Sr isotopes for cosmochemical studies

2017 ◽  
Vol 32 (7) ◽  
pp. 1388-1399 ◽  
Author(s):  
Elsa Yobregat ◽  
Caroline Fitoussi ◽  
Bernard Bourdon
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
High Precision ◽  
Thermal Ionization Mass Spectrometry ◽  
New Method ◽  
Ionization Mass ◽  
Sr Isotopes ◽  
Sr Resin ◽  
Thermal Ionization Mass ◽  
Isotope Measurements

A new protocol using Eichron™ Sr-resin for high-resolution Sr and Ba isotope measurements using thermal ionization mass spectrometry for cosmochemical samples.

scholarly journals Resolving Whether Inhalation of Depleted Uranium Contributed to Gulf War Illness Using High-Sensitivity Mass Spectrometry

2020 ◽  
Author(s):  
Randall Parrish ◽  
Robert Haley
Keyword(s):  
Mass Spectrometry ◽  
High Precision ◽  
Inhalation Exposure ◽  
High Sensitivity ◽  
Gulf War ◽  
Depleted Uranium ◽  
Isotopic Ratios ◽  
Gulf War Illness ◽  
Case Definitions ◽  
Standard Case

Abstract Background: Of the hypothesized causes of Gulf War Illness (GWI), a chronic multi-symptom illness afflicting approximately 25 percent of >700,000 military personnel deployed to the 1991 Gulf War, depleted uranium (DU) and exposure to nerve agents have stimulated the most intense international concern. Past depleted uranium research on Gulf War veterans has measured urinary uranium concentration [U] and uranium isotopic ratios with low precision mass spectrometry primarily in GW veterans with retained shrapnel but has not used high precision mass spectrometry to test for an association of GWI with inhaled DU and we set out to test this potential association. Methods: We applied a standard biokinetic model to predict the urinary total [U] and uranium isotopic ratios in urine 18 years after inhalation exposure. We applied high sensitivity mass spectrometry methods capable of detecting the predicted levels in 154 individuals of a population-representative sample of U.S. veterans in whom Gulf War illness had been determined by standard case definitions and DU inhalation exposures obtained by medical history. Results: Methods used in past studies are capable of detecting only the high urinary uranium excretion levels from retained DU shrapnel but not lower levels predicted from DU inhalation. Using high precision mass spectrometry, we found no difference in the 238U/235U ratio in veterans meeting the standard case definitions of GWI versus control veterans, and no differences by levels of DU inhalation exposure. Our bivariate analysis of 236U/238U by 235U/238U showed only the signature of natural dietary uranium, excluding DU inhalation exposures above 0.4 mg, far below the disease-causing threshold. Conclusion: The findings by high precision mass spectrometry support the conclusion that even the highest levels of DU inhalation played no role in the development of Gulf War illness. Other factors including exposure to aerosolized organophosphate compounds (pesticides and sarin nerve agent) remain as the most likely cause(s) of GWI.

Direct measurement of Fe isotope compositions in iron-dominate minerals without column chromatography using MC-ICP-MS

2022 ◽  
Author(s):  
Kaiyun Chen ◽  
Zhian Bao ◽  
Honglin Yuan ◽  
Nan Lv
Keyword(s):  
Mass Spectrometry ◽  
Direct Measurement ◽  
High Precision ◽  
Column Chromatography ◽  
Inductively Coupled Plasma ◽  
Practical Method ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Isotope Determination

This study presents a practical method for high-precision Fe isotope determination without column chromatography purification for iron-dominated mineral samples using multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). A series of comparable...

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