Sourcing Organic Compounds Based on Natural Isotopic Variations Measured by High Precision Isotope Ratio Mass Spectrometry

Asche, Sven; Michaud, Anthony L.; Brenna, J. Thomas

doi:10.1002/chin.200409300

Cited by 9 publications

(20 citation statements)

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“…The carbon isotopic composition of material from these two sampling points was indistinguishable and highly depleted in 13 C, approximately −48‰. This isotopic signature is consistent with materials derived from natural gas [14] which may suggest that the rubber material was derived from butadiene.…”

Section: Discussionsupporting

confidence: 73%

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An initial evaluation of stable isotopic characterisation of post-blast plastic debris from improvised explosive devices

et al. 2009

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Section: Discussionsupporting

confidence: 73%

“…Data are presented as the average ± standard deviation (SD) for three measurements for each sample point and each radio. In general, standard deviations were typical of those attainable by the techniques employed [14].…”

Section: Infrared and Raman Spectra Of Plastics In Pre-blast Radiosmentioning

confidence: 97%

An initial evaluation of stable isotopic characterisation of post-blast plastic debris from improvised explosive devices

et al. 2009

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“…As a means to protect both seller and consumer, food analysts are increasingly looking to stable isotope analysis, often allied with trace metal analysis, as a means to determine geographical origin (Asche, Michaud, & Brenna, 2003;LeBot, Oulhote, Deguen, & Glorennec, 2011). These techniques provide powerful tools to determine the origin of foods and to elucidate other properties such as whether the product is wholesome.…”

Section: Introductionmentioning

confidence: 99%

Stable isotope and trace metal compositions of Australian prawns as a guide to authenticity and wholesomeness

et al. 2015

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“…Thus, adulterations of maple syrup by corn syrup can be easily recognized (Schmidt, 1986 O-ratios to detect manipulations with food (addition of sugar to fruit juices, mixing of wine from different vintages or wrong origin declarations, distinguishing freshly pressed orange juice from diluted concentrates, etc.) and flavors (addition of synthetic material) see Asche et al (2003); for a multielement approach see Camin et al (2004). The use of isotopic ratio measurements to follow the fate of labeled compounds in studies of metabolism has been reviewed recently (Dolnikowski et al, 2005); applications in climate change research have been summarized by Ghosh & Brand, 2003. Isotope ratio patterns can also be used to some extent to determine the geographic region of birth and recent living of humans.…”

Section: Isotopic Abundances and Their Variationsmentioning

confidence: 99%

Mass spectrometry and isotopes: A century of research and discussion

Budzikiewicz

Grigsby²

2005

Mass Spectrometry Reviews

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In 1815, the British physician William Prout had advanced the theory that the molecular masses of elements were multiples of the mass of hydrogen. This "whole number rule" (and especially deviations from it) played an important role in the discussion whether elements could be mixtures of isotopes. F. Soddy's discovery (1910) that lead obtained by decay of uranium and of thorium differed in mass was considered a peculiarity of radioactive materials. The question of the existence of isotopes came up when the instruments developed by J.J. Thomson and by W. Wien to study cathode and canal rays by deflection in electric and magnetic fields were steadily improved. In 1913, Thomson mentioned a weak line at mass 22 accompanying the expected one at mass 20 when he analyzed the mass spectrum of neon. Subsequently Aston obtained the mass spectrum of chlorine with masses at 35 and 37. Still in 1921, Thomson objected heavily to the idea of isotopes. The isotope problem was finally settled, but more accurate mass measurements showed that even isotopic weights differed to some extent from the whole numbers. Based on earlier ideas of P. Langevin and J.-L. Costa, F.W. Aston and A.J. Dempster developed the idea of packing fractions and mass defects due to the transformation of a portion of the matter comprising the atomic nucleus into energy. While the determination of the exact isotopic masses had improved over the years, the accurate determination of isotopic abundances remained a problem as long as photographic recording was used. Here especially A.O. Nier pioneered using dual collectors and compensation measurements. This was the prerequisite for the discovery that isotopic ratios varied somewhat in nature. M. Dole discovered the fractionation of oxygen isotopes by photosynthesis and respiration. Today 13C/12C-ratios are employed to detect adulterations of food and in doping analysis, and 14C/13C-ratios obtained by accelerator mass spectrometry are used for dating historical objects, just to give some examples.

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Sourcing Organic Compounds Based on Natural Isotopic Variations Measured by High Precision Isotope Ratio Mass Spectrometry

Abstract: For Abstract see ChemInform Abstract in Full Text.

Cited by 9 publications

References 1 publication

An initial evaluation of stable isotopic characterisation of post-blast plastic debris from improvised explosive devices

An initial evaluation of stable isotopic characterisation of post-blast plastic debris from improvised explosive devices

Stable isotope and trace metal compositions of Australian prawns as a guide to authenticity and wholesomeness

Mass spectrometry and isotopes: A century of research and discussion

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