Forensic analysis of explosives using isotope ratio mass spectrometry (IRMS) - Part 1: Instrument validation of the DELTAplusXP IRMS for bulk nitrogen isotope ratio measurements

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Show simple item record Benson, SJ Lennard, CJ Hill, DM Maynard, P Roux, C 2011-02-07T06:18:57Z 2010-01
dc.identifier.citation Journal of Forensic Sciences, 2010, 55 (1), pp. 193 - 204
dc.identifier.issn 0022-1198
dc.identifier.other C1 en_US
dc.description.abstract A significant amount of research has been conducted into the use of stable isotopes to assist in determining the origin of various materials. The research conducted in the forensic field shows the potential of isotope ratio mass spectrometry (IRMS) to provide a level of discrimination not achievable utilizing traditional forensic techniques. Despite the research there have been few, if any, publications addressing the validation and measurement uncertainty of the technique for forensic applications. This study, the first in a planned series, presents validation data for the measurement of bulk nitrogen isotope ratios in ammonium nitrate (AN) using the DELTAplusXP (Thermo Finnigan) IRMS instrument equipped with a ConFlo III interface and FlashEA™ 1112 elemental analyzer (EA). Appropriate laboratory standards, analytical methods and correction calculations were developed and evaluated. A validation protocol was developed in line with the guidelines provided by the National Association of Testing Authorities, Australia (NATA). Performance characteristics including: accuracy, precision/repeatability, reproducibility/ruggedness, robustness, linear range, and measurement uncertainty were evaluated for the measurement of nitrogen isotope ratios in AN. AN (99.5%) and ammonium thiocyanate (99.99+%) were determined to be the most suitable laboratory standards and were calibrated against international standards (certified reference materials). All performance characteristics were within an acceptable range when potential uncertainties, including the manufacturer's uncertainty of the technique and standards, were taken into account. The experiments described in this article could be used as a model for validation of other instruments for similar purposes. Later studies in this series will address the more general issue of demonstrating that the IRMS technique is scientifically sound and fit-for-purpose in the forensic explosives analysis field. © 2009 American Academy of Forensic Sciences.
dc.language eng
dc.relation.isbasedon 10.1111/j.1556-4029.2009.01241.x
dc.title Forensic analysis of explosives using isotope ratio mass spectrometry (IRMS) - Part 1: Instrument validation of the DELTAplusXP IRMS for bulk nitrogen isotope ratio measurements
dc.type Journal Article
dc.parent Journal of Forensic Sciences
dc.journal.volume 1
dc.journal.volume 55
dc.journal.number 1 en_US
dc.publocation Malden en_US
dc.identifier.startpage 193 en_US
dc.identifier.endpage 204 en_US SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.conference Annual Conference of the Pacific Rim Real Estate Society
dc.for 0399 Other Chemical Sciences
dc.personcode 0000016451
dc.personcode 980952
dc.personcode 960382
dc.percentage 100 en_US Other Chemical Sciences en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US 2010-01-24
dc.location.activity ISI:000273310900034 en_US
dc.location.activity Wellington, New Zealand
dc.description.keywords Ammonium nitrate
dc.description.keywords Forensic science
dc.description.keywords Isotope ratio mass spectrometry
dc.description.keywords Nitrogen isotope ratios
dc.description.keywords Validation
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - Forensic Science
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
pubs.consider-herdc true
utslib.collection.history School of Chemistry and Forensic Science (ID: 339)
utslib.collection.history Closed (ID: 3)

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