Search Results - "Dunn, Philip J H"

Solution to isotope delta challenge by Dunn, Philip J. H., Meija, Juris

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Calibration strategies for the determination of stable carbon absolute isotope ratios in a glycine candidate reference material by elemental analyser-isotope ratio mass spectrometry by Dunn, Philip J. H., Malinovsky, Dmitry, Goenaga-Infante, Heidi

“…We report a methodology for the determination of the stable carbon absolute isotope ratio of a glycine candidate reference material with natural carbon…”
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Global spatial distributions of nitrogen and carbon stable isotope ratios of modern human hair by Hülsemann, Frank, Lehn, Christine, Schneiders, Sabine, Jackson, Glen, Hill, Sarah, Rossmann, Andreas, Scheid, Nicole, Dunn, Philip J. H., Flenker, Ulrich, Schänzer, Wilhelm

“…Rationale Natural stable carbon (δ13C) and nitrogen isotope ratios (δ15N) of humans are related to individual dietary habits and environmental and…”
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Isotope delta challenge by Dunn, Philip J H, Meija, Juris

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Food Matrix Reference Materials for Hydrogen, Carbon, Nitrogen, Oxygen, and Sulfur Stable Isotope-Ratio Measurements: Collagens, Flours, Honeys, and Vegetable Oils by Schimmelmann, Arndt, Qi, Haiping, Dunn, Philip J. H, Camin, Federica, Bontempo, Luana, Potočnik, Doris, Ogrinc, Nives, Kelly, Simon, Carter, James F, Abrahim, Aiman, Reid, Lauren T, Coplen, Tyler B

“…An international project developed, quality-tested, and measured isotope–delta values of 10 new food matrix reference materials (RMs) for hydrogen, carbon,…”
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Recalculation of stable isotope expressions for HCNOS: EasyIsoCalculator by Skrzypek, Grzegorz, Dunn, Philip J.H.

“…Rationale The stable HCNOS isotope compositions can be reported as (a) the isotope ratio of two stable isotopes (R); (b) the isotope delta value (δ); and (c)…”
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Systematic comparison of post-column isotope dilution using LC-CO-IRMS with qNMR for amino acid purity determination by Dunn, Philip J. H., Malinovsky, Dmitry, Achtar, Eli, Clarkson, Cailean, Goenaga-Infante, Heidi

“…Determination of the purity of a substance traceable to the International System of Units (SI) is important for the production of reference materials affording…”
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Calibration hierarchies for light element isotope delta reference materials by Dunn, Philip J.H., Malinovsky, Dmitry, Goenaga‐Infante, Heidi

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Investigation of mass dependence effects for the accurate determination of molybdenum isotope amount ratios by MC-ICP-MS using synthetic isotope mixtures by Malinovsky, Dmitry, Dunn, Philip J. H., Petrov, Panayot, Goenaga-Infante, Heidi

“…Methodology for absolute Mo isotope amount ratio measurements by multicollector inductively coupled plasma-mass spectrometry (MC-ICP-MS) using calibration with…”
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Publication of the second edition of the FIRMS Network's Good Practice Guide for Isotope Ratio Mass Spectrometry by Dunn, Philip J.H., Carter, James F.

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The ‘LSVEC problem’ for the Vienna Peedee belemnite carbon isotope‐delta scale by Dunn, Philip J. H., Camin, Federica

“…Since 2016 there have been intense discussions within several established communities and networks regarding the consequences of the withdrawal of the LSVEC…”
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Perspective: Hidden biases in isotope delta results and the need for comprehensive reporting by Dunn, Philip J. H., Skrzypek, Grzegorz

“…Measurements of stable‐isotope composition on an isotope‐delta scale can be subject to bias between laboratories or over time within a single laboratory. This…”
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Absolute isotope ratios defining isotope scales used in isotope ratio mass spectrometers and optical isotope instruments by Skrzypek, Grzegorz, Dunn, Philip J. H.

“…Rationale The isotope delta is calculated from the isotope ratio of a sample and the absolute isotope ratio of the zero reference point defining each stable…”
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Comparison of liquid chromatography-isotope ratio mass spectrometry (LC/IRMS) and gas chromatography-combustion-isotope ratio mass spectrometry (GC/C/IRMS) for the determination of collagen amino acid δ13C values for palaeodietary and palaeoecological reconstruction by Dunn, Philip J. H., Honch, Noah V., Evershed, Richard P.

“…Results are presented of a comparison of the amino acid (AA) δ13C values obtained by gas chromatography–combustion–isotope ratio mass spectrometry (GC/C/IRMS)…”
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Guidance for characterization of in‐house reference materials for light element stable isotope analysis by Dunn, Philip J. H., Malinovsky, Dmitry, Holcombe, Gill, Cowen, Simon, Goenaga‐Infante, Heidi

“…Rationale Preparation of in‐house reference materials (RMs) is an important aspect of light element stable isotope analysis. While some relevant information is…”
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Re‐determination of R(13C/12C) for Vienna Peedee belemnite (VPDB) by Dunn, Philip J. H., Malinovsky, Dmitry, Ogrinc, Nives, Potočnik, Doris, Flierl, Lukas, Rienitz, Olaf, Paul, Dipayan, Meijer, Harro A. J.

“…Rationale The isotope ratio for the internationally agreed but virtual zero‐point of the carbon isotope‐delta scale, Vienna Peedee belemnite (VPDB), plays a…”
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Forensic application of stable isotope delta values: Proposed minimum requirements for method validation by Dunn, Philip J. H., Salouros, Helen, Carter, James F., Doyle, Sean P.

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Analytical improvements and developments in stable isotope laboratories for HCNOS analyses by Skrzypek, Grzegorz, Dunn, Philip J.H., Imfeld, Gwenaël

“…Analytical improvements and developments in stable isotope laboratories for HCNOS analysesThe analyses of the stable isotope compositions of light elements,…”
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Simple spreadsheet templates for the determination of the measurement uncertainty of stable isotope ratio delta values by Dunn, Philip J. H., Hai, Lu, Malinovsky, Dmitry, Goenaga-Infante, Heidi

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Compound-specific amino acid isotopic proxies for distinguishing between terrestrial and aquatic resource consumption by Webb, Emily C., Honch, Noah V., Dunn, Philip J. H., Linderholm, Anna, Eriksson, Gunilla, Lidén, Kerstin, Evershed, Richard P.

“…Compound-specific amino acid carbon-isotope compositions have shown particular promise for elucidating dietary behaviors in complex environmental contexts, and…”
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