Results 201 to 210 of about 57,277 (241)

A review on the determination of isotope ratios of boron with mass spectrometry

Mass Spectrometry Reviews, 2016
The present review discusses different mass spectrometric techniques—viz, thermal ionization mass spectrometry (TIMS), inductively coupled plasma mass spectrometry (ICPMS), and secondary ion mass spectrometry (SIMS)—used to determine 11B/10B isotope ratio, and concentration of boron required for various applications in earth sciences, marine ...
Suresh Kumar, Aggarwal, Chen-Feng, You
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Forensic applications of isotope ratio mass spectrometry—A review

Forensic Science International, 2006
The key role of a forensic scientist is to assist in determining whether a crime has been committed, and if so, assist in the identification of the offender. Many people hold the belief that a particular item can be conclusively linked to a specific person, place or object. Unfortunately, this is often not achievable in forensic science.
Sarah, Benson, Chris, Lennard, Philip, Maynard, Claude, Roux   +3 more
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Forensic isotope ratio mass spectrometry of packaging tapes

The Analyst, 2004
Pressure sensitive adhesive tape (brown parcel tape) is employed in a great many criminal activities such as the restraint of individuals during robbery and offences against the person, the enclosure of explosive devices and the packaging and concealment of controlled drugs.
Carter, James F., Grundy, Polly L., Hill, Jenny C., Ronan, Neil C., Titterton, Emma L., Sleeman, Richard   +5 more
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The Influence of Diet on Isotope Ratio Mass Spectrometry Values

Clinical Journal of Sport Medicine, 2009
Athletes have increasingly used testosterone (T) and other endogenous anabolic steroids that cannot be detected by conventional gas chromatography-mass spectrometry. This led to gas chromatography-combustion-isotope ratio mass spectrometry(GC/C/IRMS), which measures the relative amount of 13C in urinary steroids.
Gary, Green, Rodrigo, Aguilera, Brian, Ahrens, Boro, Starcevic, Felice, Kurtzman, Jinbo, Su, Don, Catlin   +6 more
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Isotope ratio mass spectrometry – history and terminology in brief

Drug Testing and Analysis, 2012
The history of isotope ratio mass spectrometry (IRMS) is briefly described. It is shown that the fundamental design of isotope ratio mass spectrometers has not changed since the 1940s. The basic findings concerning the natural variation of isotope abundances even date back to the 1930s.
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Gas Source Isotope Ratio Mass Spectrometry (IRMS)

2014
Gas source isotope ratio mass spectrometry is usually referred to as isotope ratio mass spectrometry (IRMS) or stable-isotope ratio mass spectrometry (SIRMS). IRMS is a conventional method for measuring isotope ratios and has benefited from more than 65 years of research and development.
Brand, W., Douthitt, C., Fourel, F., Maia, R., Rodrigues, C., Maguas, C., Prohaska, T.   +6 more
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The Forensic Isotope Ratio Mass Spectrometry (FIRMS) network Good Practice Guide for Isotope Ratio Mass spectrometry 3rd edition

Science & Justice
The Forensic Isotope Ratio Mass Spectrometry (FIRMS) Network announce the publication of the Third Edition of the Good Practice Guide for Isotope Ratio Mass Spectrometry. In the third edition, changes include a new chapter on sampling covering method of sampling a population, sampling for homogeneity testing of a material as well as considerations for ...
Philip J.H. Dunn, Christopher Brodie, Ethan Strak, James F. Carter   +3 more
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High-precision continuous-flow isotope ratio mass spectrometry

Mass Spectrometry Reviews, 1997
Although high-precision isotope determinations are routine in many areas of natural science, the instrument principles for their measurements have remained remarkably unchanged for four decades. The introduction of continuous-flow techniques to isotope ratio mass spectrometry (IRMS) instrumentation has precipitated a rapid expansion in capabilities for
J T, Brenna, T N, Corso, H J, Tobias, R J, Caimi   +3 more
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Fast Gas Chromatography Combustion Isotope Ratio Mass Spectrometry

Analytical Chemistry, 2007
We report here the first coupling of fast GC to IRMS, in a system capable of 250 ms peak widths (fwhm) at 1 mL/min flow rates, one-fifth as narrow as any previously reported GCC-IRMS system. We developed an optimized postcolumn interface that results in minimal peak broadening, using a programmable temperature vaporization injector in place of a rotary
Gavin L, Sacks, Ying, Zhang, J Thomas, Brenna   +2 more
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Isotope Ratio Measurements with Elemental-Mode Electrospray Mass Spectrometry

Analytical Chemistry, 1996
The isotope ratio capabilities of an electrospray ionization source interfaced to a quadrupole mass spectrometer are described. With the instrument operated in the metal ion mode, isotope measurements of Ag, Tl, and Pb are conducted using elemental ions produced from 1 × 10(-)(4) M solutions of metal nitrates or acetates in methanol.
M E, Ketterer, J P, Guzowski
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