Knowledge Base

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  • Clumped Isotopes

13C18O16O in air

John M. Eiler, Edwin Schauble and Nami Kitchen

CalTech, USA

Geochimica et Cosmochimica Acta (2003), V67 (18), ppA86-A86, ISSN 0016-7037

Goal: The atmospheric budget of CO2 is constrained by its concentration, δ13C and δ18O. However, these are insufficient to resolve source and sink processes, which vary complexly in flux and/or isotope signature. There are twelve stable isotopologues of CO2, each of which has unique thermodynamic and kinetic properties and could offer unique constraints on the budget.

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  • MC-ICPMS
  • Neptune
  • Li Isotopes
  • Rock Standards

Lithium Isotope Measurements Using Thermo Scientific NEPTUNE Multicollector ICP-MS

Claudia Bouman and Johannes B. Schwieters

Thermo Fisher Scientific, Bremen, Germany

AN30014

Goal: Here, we report on the short-term reproducibility of Li isotope analyses of NIST L-SVEC lithium carbonate standard and two international rock standards, BHVO-1 (USGS) and JG-2 (GSJ) with the Thermo Scientific NEPTUNE MC-ICP-MS.

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  • MC-ICPMS
  • Neptune
  • Sr
  • Nd

Nd and Hf Isotope Measurements Using a Double Focusing Multicollector ICP-MS

Stefan Weyer (1) and Johannes B. Schwieters (2)

1) Goethe-Universität, Frankfurt, Germany, 2) Thermo Fisher Scientific, Bremen, Germany

AN30013

Goal: This report describes the short- and long-term performance of the NEPTUNE. The short-term reproducibility is demonstrated by the measurement of an Nd standard solution over 3.5 hrs. The long-term reproducibility of Hf isotope composition measurements is measured over a 9 month period.

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  • IRMS
  • EA IsoLink
  • Isotope Fingerprints
  • Food Authenticity
  • Green Coffee

EA-IRMS: Tracing the geographical origin of green coffee beans using isotope fingerprints

Christopher Brodie, Maryam Weigt and Oliver Kracht

Thermo Fisher Scientific, Bremen, Germany

AN30427

Goal: In this application note we show hydrogen and oxygen isotope measurements on green coffee beans measured with the EA IsoLink IRMS System. We were able to trace the origin of green coffee beans based on unique trends observed from their isotopic fingerprints.

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  • IRMS
  • GC IsoLink
  • Isotope Fingerprints
  • Tequila
  •   Adulteration
  • Fraud

GC-IRMS: Detecting purity and adulteration of tequila with isotope fingerprints

Dieter Juchelka, Mario Tuthorn and Christopher Brodie

Thermo Fisher Scientific, Bremen, Germany

AB30477

Goal: This application brief reports the carbon and oxygen measurements from commercial tequila, sugar cane and the A. tequilana plant using Gas Chromatography Isotope Ratio Mass Spectrometry and demonstrates how isotope fingerprints can identify beverage adulteration.

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  • MC-ICPMS
  • Neptune Plus
  • K Isotopes
  • High Mass Resolution
  • Flow Injection

Measurement of Stable Isotope 41K/39K Ratios by MC-ICP-MS

Nicholas S. Lloyd (1), Grant Craig (1), M. Paul Field (2), Paul Watson (2), Leah E. Morgan (3), Danielle Santiago Ramos (4) and John A. Higgins (4) 

1) Thermo Fisher Scientific, Bremen, Germany, 2) Elemental Scientific Inc., Omaha, USA, 3) USGS Denver, USA, 4) Princeton University, USA

PO30446

Goal: This poster reports high precise stable K isotope ratio analysis using conventional MC-ICPMS using  high resolving power and a highly efficient and stable sample introduction.

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  • MC-ICPMS
  • Neptune Plus
  • Pb Isotopes
  • Peat
  • Gas Chromatography
  • Speciation

Characterisation of the deposition of organolead compounds in the Irish peatlands by GC-MC-ICP-MS

Grant Craig (1), Carolina Rosca (2), Emma Tomlinson (2), Balz Kamber (2), Nicholas Lloyd (1), Claudia Bouman (1) and Johannes Schwieters (1)

1) Thermo Fisher Scientific, Bremen, Germany, 2) Department of Geology, Trinity College Dublin, College Green, Dublin 2, Ireland

PO30444

Goal: Here we report on Pb isotope analysis of organolead compounds extracted from Irish peat cores by GC-MC-ICP-MS, using the new, commercially available, CCI-300 interface coupled to the Neptune Plus™ MC-ICP-MS.

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  • IRMS
  • EA IsoLink
  • GC IsoLink
  • LC Isolink Interface
  • Isotope Fingerprints
  • Food Authenticity
  •   Adulteration
  • Fraud

Food Integrity Application Compendium

Thermo Fisher Scientific

AB72323

Goal: This food integrity compendium highlights key applications for authenticity, adulteration and halal foods using the Thermo Scientific product portfolio

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  • IRIS
  • Delta Ray
  • Greenhouse Gases
  • CO2
  • Carbon and Oxygen Isotopes

A Q&A: Chasing Greenhouse Gases at Our Doorstep - Isotopes as a Tool to Identify Urban Carbon Dioxide Sources

LCGC

Goal: A dedicated dialogue with Felix Vogel about monitoring greenhouse gases using the Delta Ray Isotope Ratio Infrared Spectrometer

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  • MC-ICPMS
  • Neptune Plus
  • Dynamic Tau Correction
  • 1013 ohm amplifier technology
  • Laser Ablation

Dynamic time correction for high precision isotope ratio measurements

Grant Craig (1), Zhifang Hu (2), Anyu Zhang (2), Nicholas S. Lloyd (1), Claudia Bouman (1) and Johannes Schwieters (1)

1) Thermo Fisher Scientific, Bremen, Germany, 2) Thermo Fisher Scientific, China

TN30396

Goal: This note demonstrates the application of dynamic, response time-based, correction to high precision isotope ratio measurements on the Thermo Scientific Neptune Plus MC-ICP-MS, using 1013 ohm amplifier technology.

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  • MC-ICPMS
  • Neptune Plus
  • High Resolution ICP-MS
  • Element 2/XR
  • iCAP TQ
  • LASS
  • triple LASS

Laser ablation split stream (LASS) between three ICP-MS for zircon petrochronology

G. Craig (1), D. A. Frick (2), C. Bouman (1), N. Lloyd (1), F. von Blanckenburg (2) and J. B. Schwieters (1)

1) Thermo Fisher Scientific, Bremen, Germany, 2) GFZ German Research Centre for Geosciences, Potsdam, Germany

TN30415

Goal: This note evaluates the effectiveness of laser ablation split stream (LASS) between three different inductively coupled plasma mass spectrometers (ICP-MS) for
zircon geochronology

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  • IRIS
  • Delta Ray
  • Greenhouse Gases
  • CO2
  • Carbon and Oxygen Isotopes

Chasing greenhouse gases at our doorstep – isotopes as tool to identify urban CO2 sources: A wintertime field study in the heart of the Paris megacity 

Felix Vogel (1), Irene Xueref-Remy (1), Mathieu Sebilo (2), HJ Jost (3) and Magda Mandic (3)

1) LSCE, UVSQ, University Paris-Saclay, 2) Pierre and Marie Curie University, Paris, 3) Thermo Fisher Scientific, Bremen, Germany

AN30384

Goal: This note describes how the impact of different CO2 sources in Paris can be quantificed using continuous measurements of CO2 and its isotopologues: O13CO and 18OCO.

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  • IRIS
  • Delta Ray Connect
  • Dissolved Inorganic Carbon
  • Carbon and Oxygen Isotopes

Determination of Carbon δ13C isotopic composition from DIC samples

Magda Mandic, Nils Stoebener, Luka Mandic and Danijela Šmajgl

Thermo Fisher Scientific, Bremen, Germany

AN30367

Goal: This note demonstrates the method for Dissolved Inorganic Carbon (DIC) analysis by using the Thermo Scientific Delta Ray Isotope Ratio Infrared Spectrometer with URI Connect.

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  • MC-ICP-MS
  • Neptune Plus
  • Gas Chromatography
  • GCI300
  • Speciation
  • Lead
  • Isotope Ratios
  • 1013 ohm

Low-level lead speciation and isotope ratio analysis by GC-MC-ICP-MS using the Thermo Scientific GCI 300 Interface and 1013 ohm technology

Grant Craig, Antonella Guzzonato, Shona McSheehy Ducos and Claudia Bouman

Thermo Fisher Scientific, Bremen, Germany

AB30382

Goal: This note describes a method for simultaneous lead speciation and isotope ratio analysis using the Neptune Plus Multicollector ICP-MS coupled with the Trace 1310 GC using the GCI300.

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  • IRMS
  • Flash 1110 Elemental Analyzer
  • CNS isotopes

Simultaneous δ15N, δ13C and δ34S measurements of lowbiomass samples using a technically advanced high sensitivity elemental analyzer connected to an isotope ratio mass spectrometer

T. Hansen, A. Burmeister and U. Sommer

Leibniz-Institute for Marine Sciences at Kiel University, Dusternbrooker Weg 20, 24105 Kiel, Germany

Rapid Communications in Mass Spectrometry (2009), V23, pp3387–3393, doi: 10.1002/rcm.4267

Goal: Conventional simultaneous CNS stable isotope abundance measurements of solid samples usually require high sample amounts, up to 1mg carbon, to achieve exact analytical results. This rarely used application is often impaired by high C:S element ratios when organic samples are analyzed and problems such as incomplete conversion into sulphur dioxide occur during analysis. We introduce, as a technical innovation, a high sensitivity elemental analyzer coupled to a conventional isotope ratio mass spectrometer, with which CNS-stable isotope ratios can be determined simultaneously in samples with low carbon content (<40mg C corresponding to ca. 100mg dry weight).