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  • IRMS
  • Delta V
  • Stable Isotopes
  • Strawberry
  • Essential Oils

Headspace-solid phase microextraction coupled to gas chromatography–combustion-isotope ratio mass spectrometer and to enantioselective gas chromatography for strawberry flavoured food quality control

Luisa Schipilliti (1), Paola Dugo (1,2), Ivana Bonaccorsi (1) and Luigi Mondello (1,2)

1) Dipartimento Farmaco-chimico, Facoltà di Farmacia, Università di Messina, Viale Annunziata, 98168 Messina, Italy, 2) Università Campus-Biomedico, Via A. del Portillo 21, 00128 Roma, Italy

Journal of Chromatography A (2011), V1218 (42), p7481-7486, doi: 10.1016/j.chroma.2011.07.072

Goal: Authenticity assessment of flavoured strawberry foods was performed using headspace-solid phase microextraction (HS-SPME) coupled to gas chromatography–combustion-isotope ratio mass spectrometry (GC–C-IRMS).

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  • IRMS
  • Delta V
  • Stable Isotopes
  • Essential Oils

Evaluation of Gas Chromatography?Combustion?Isotope Ratio Mass Spectrometry (GC-C-IRMS) for the Quality Assessment of Citrus Liqueurs

Luisa Schipilliti (1), Ivana Bonaccorsi 1), Antonella Cotroneo (1), Paola Dugo (1,2 and Luigi Mondello (1,2)

1) Diaprtimento di Scienze del Farmaco e dei Prodotti per la Salute, Universita? di Messina, Viale Annunziata, 98168 Messina, Italy, 2) Campus-Biomedico, Via A. del Portillo 21, 00128 Roma, Italy

Journal of Agricultural and Food Chemistry (2013), V61 (8), pp1661–1670, doi: 10.1021/jf3028073

Goal: The aim of this study is to investigate the authenticity of Italian liqueurs, of lemon, bergamot, and mandarin (locally known as “limoncello”, “bargamino”, and “mandarinetto”), comparing the carbon isotope ratios with values determined in genuine cold-pressed peel oils.

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

Determination of Carbon ?13C isotopic composition from DIC samples by using new Thermo Scientific Delta Ray Isotope Ratio Infrared Spectrometer with URI Connect

Magda Mandic, Nils Stoebener, Luka Mandic, Danjiela Smagl, HJ Jost

Thermo Fisher Scientific, Bremen, Germany

Poster Note 30359

Goal: This poster note demonstrates the measurement procedure for dissolved organic carbon (DIC) for the Delta Ray Connect with autosampler.

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  • MC-ICP-MS
  • Neptune Plus
  • Gas Chromatography
  • GCI300
  • Speciation
  • Sulfur
  • Isotope Ratios
  • Crude Oil

Application of a new interface to the ?34S speciation analysis of volatile organic compounds in crude oil by GC-MC-ICP-MS

Grant Craig, Antonella Guzzonato, Christopher Brodie, Shona McSheehy-Ducos and Claudia Bouman

Thermo Fisher Scientific, Bremen, Germany

Poster 30401

Goal: The performance of a new GC-MC-ICP-MS coupling interface, the GCI 300 Interface, between the Trace 1310 GC and Neptune Plus MC-ICP-MS has been demonstrated by ?34S speciation analysis of four crude oil samples.

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  • MC-ICP-MS
  • Neptune Plus
  • Gas Chromatography
  • GCI300
  • Speciation
  • Sulfur
  • Isotope Ratios
  • Crude Oil

Speciation and ?34S analysis of volatile organic compounds in crude oil by GC-MC-ICP-MS using the Thermo Scientific GCI 300 Interface

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

Thermo Fisher Scientific, Bremen, Germany

TN30383

Goal: This note demonstrates the utility of the Neptune Plus Multicollector ICP-MS, when coupled with the Trace 1310 GC via the GCI300 Interface, for isotopic sulfur analysis of individual compounds within a series of crude oil samples.

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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 ? 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
  • Delta V Adv
  • Flash 2000 HT
  • 15N

Determination of the natural abundance ?15N of nortropane alkaloids by gas chromatography–isotope ratio mass spectrometry of their ethylcarbamate esters

Katarzyna Kosieradzka, Illa Tea, Emmanuel Gentil and Richard J. Robins

Elucidation of Biosynthesis by Isotopic Spectrometry Group, Unit for Interdisciplinary Chemistry: Synthesis-Analysis-Modelling (CEISAM), University of Nantes—CNRS UMR6230, 2, rue de la Houssinière, 44322 Nantes, France

Analytical Bioanalytical Chemistry (2010), V396, pp1405–1414, doi: 10.1007/s00216-009-3354-z

Goal: A method is described which allows both the quantification of nortropane alkaloids and the determination of their natural abundance ?15N values. The protocol exploits the derivatisation of the alkaloids by reaction with ethyl chloroformate in aqueous medium and the quantitative extraction of the ensuing ethylcarbamate esters. The improved chromatographic properties of these derivatives gives ample separation of the isomeric nortropine and norpseudotropine for measurement of their ?15N (‰) values by isotope ratio mass spectrometry interfaced to gas chromatography. Adequate separation could not be achieved with the underivatised compounds. Repeatability and precision are sufficient to allow differences in the ?15N values (??15N)>0.8‰ to be measured, with a standard deviation routinely ?0.3‰. The methodology has been tested by determining the changes in the ?15N values of nortropine and norpseudotropine during degradation by cell suspension cultures of a Pseudomonas strain expressing a specific capacity for tropine catabolism. The precision and reproducibility are shown sufficient to allow the evolution of the ?15N values to be followed during the fermentation.

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  • IRIS
  • Delta Ray
  • Carbon Isotopes
  • Dissolved Organic Matter
  • Marine Sediments

Determination of Carbon Isotope Ratios (?13C) of Dissolved Inorganic Carbon (DIC) in Marine Sediment Pore Water Using the Delta Ray IRIS with URI Connect

Marcus Elvert (1), Tim Stoltmann (1), Heidi Taubner (1), Nils Stöbener (2), Eric Wapelhorst (2), H.J. Jost (1) and Magda Mandic (1)

1) MARUM, University of Bremen, Germany, 2) Thermo Fisher Scientifc, Bremen, Germany

AN30335

Goal: The goal of this study is to demonstrate the performance of Delta Ray IRIS with URI Connect for the isotopic analysis of Dissolved Inorganic Carbon (DIC)

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  • IRMS: EA IsoLink
  • O isotopes
  • Nitrogen-rich samples

EA-IRMS: Accurate and Precise Weight% O and ?18O Analysis of Nitrogen-rich Samples using the EA IsoLink IRMS System

Christopher Brodie, Oliver Kracht and Charles Douthitt

Thermo Fisher Scientific, Bremen, Germany

AN30374

Goal: The goal of this study is to demonstrate high precision weight% O and ?18O analysis on nitrogen-rich sample matrices with complete N2 and CO peak separation using continuous flow gas chromatography.

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  • IRMS: EA IsoLink
  • NCS analysis

EA–IRMS: Simultaneous NCS Isotope Analysis

Christopher Brodie, Oliver Kracht and Alexander Hartwig

Thermo Fisher Scientific, Bremen, Germany

AB30366

Goal: The goal of this study is to demonstrate simultaneous NCS analysis on the Thermo Scientific™ EA IsoLink™ IRMS System.

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  • IRMS: EA IsoLink
  • Sulfur Isotopes
  • IAEA standards

EA-IRMS: No Intra-sample Memory for ?34S Measurements of Inorganic Sulfur Materials Using the EA IsoLink IRMS System

Christopher Brodie, Oliver Kracht, Alexander Hartwig, Andreas Hilkert and Charles Douthitt

Thermo Fisher Scientific, Bremen, Germany

AB30357

Goal: The goal of this study is to demonstrate that the EA IsoLink IRMS System is free from intra-sample memory for ?34S measurements by using inorganic international reference materials.

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  • IRMS: EA IsoLink
  • Wood
  • C, N, S isotopes

EA-IRMS: Simultaneous ?13C, ?15N, and ?34S Analysis of Wood with the EA IsoLink IRMS System

Christopher Brodie, Oliver Kracht, Alexander Hartwig, Andreas Hilkert and Charles Douthitt

Thermo Fisher Scientific, Bremen, Germany

AB30356

Goal: The goal of this study is to demonstrate simultaneous NCS analysis on wood samples, with a C/S ratio > 7000:1, using the EA IsoLink IRMS System.

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Thermo Scientific LC IsoLink™

Thermo Fisher Scientific, Bremen, Germany

BR30039

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  • IRMS
  • GC-IRMS
  • Compound Specific Isotope Analysis
  • PAHs

GC-IRMS: ?13C Analysis of PAHs in Soil and Sediment Samples using High Resolution GC Coupled with Isotope Ratio MS

Dieter Juchelka

Thermo Fisher Scientific, Bremen, Germany

AN30268

Goal: Gas chromatography coupled with Isotope Ratio MS (GC-IRMS) has entered into widespread applications like environmental studies and forensics enabling compound specific isotope analysis (CSIA). Isotopic fingerprints analyzed by GC-IRMS may still provide information where classical GC/MS methods based on compound quantitation cannot. The potential of using CSIA for source differentiation of environmental polycyclic aromatic hydrocarbons (PAHs) has already been demonstrated.

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  • IRMS
  • Kiel IV carbonate device
  • Paleoclimate
  • Small carbonate

Isotope Analysis of 6 – 130 ?g samples with the KIEL IV Carbonate Device

Jens Radke, Peter Haubold and Andreas Hilkert

Thermo Fisher Scientific, Bremen, Germany

AN30176

Goal: Isotopic analysis of small (6-130 ?g) samples of CaCO3 is increasingly important in paleoclimatic reconstructions. The requirement for isotopic analysis of small samples of carbonate arose in studies of biogenic carbonates (e.g. foraminifera, bivalves, brachiopods, otoliths, corals).