Feed additives: authenticity assessment using multicomponent-/multielement-isotope ratio mass spectrometry

Greule, Markus; Hänsel, Clarissa; Bauermann, U.; Mosandl, Armin

doi:10.1007/s00217-007-0785-7

Cited by 21 publications

(15 citation statements)

References 2 publications

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“…In contrast, in spite of oxygen pyrolysis reactors for the online coupling of GC with IRMS having been available for about a decade,28 compound‐specific δ 18 O analysis of GC eluates (GC‐Py‐IRMS) has hardly been applied 29–32…”

mentioning

confidence: 99%

Compound‐specific δ¹⁸O analyses of neutral sugars in soils using gas chromatography–pyrolysis–isotope ratio mass spectrometry: problems, possible solutions and a first application

Zech

Glaser

2009

Rapid Comm Mass Spectrometry

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Although gas chromatography-pyrolysis-isotope ratio mass spectrometry (GC-Py-IRMS) has allowed us to make online compound-specific delta18O measurements for about the last ten years, this technique has hardly been applied. We tested different pyrolysis reactor designs using standards (vanillin, ethylvanillin, a fatty acid methyl ester and alkanes) in order to optimize the GC-Py-IRMS delta18O measurements. The method was then applied to methylboronic acid (MBA) sugar derivatives (pentoses, 6-deoxyhexoses and hexoses). Plant- and microbial-derived monosaccharides were extracted hydrolytically from litter and topsoils before derivatization. The measured delta18O values of samples and co-analyzed reference material were first drift-corrected by use of regularly discharged pulses of CO reference gas. Secondly, they were corrected for the amount dependence of the delta18O values. Thirdly, the delta18O values were calibrated using the reference material (principle of 'Identical Treatment'), and, finally, a correction was applied by taking the hydrolytically introduced and water-exchangeable oxygen atoms into account. Our results suggest that the delta18O values of plant-derived monosaccharides in litter reflect the climatic conditions of the last year, whereas delta18O values of the respective topsoils reflect the averaged climate signal of the last decades or even centuries. This demonstrates the high potential of the method for palaeoclimate reconstructions.

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mentioning

confidence: 99%

Compound‐specific δ¹⁸O analyses of neutral sugars in soils using gas chromatography–pyrolysis–isotope ratio mass spectrometry: problems, possible solutions and a first application

Zech

Glaser

2009

Rapid Comm Mass Spectrometry

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“…15). Although the instrumental coupling of GC-Py-IRMS is commercially available for about 10 years, this method has hardly been adopted by researches so far (Hener et al 1998;Jung et al 2005;Jung et al 2007;Greule et al 2008). We think that the following d 18 O method may be most promising for loess research in the near future.…”

Section: Compound-specific δ 18 O-analyzes Of Monosaccharidesmentioning

confidence: 99%

Novel methodological approaches in loess research – interrogating biomarkers and compound-specific stable isotopes

Zech¹,

Zech²,

Buggle³

et al. 2011

E&G Quaternary Sci. J.

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Abstract. Löss-Paläoboden Sequenzen sind wichtige terrestrische Archive für die Rekonstruktion der quartären Landschafts- und Klimageschichte. Die Entwicklung neuer, quantitativerer Paläoklima-Proxies könnte in den kommenden Jahren eine neue Ära in der Lössforschung einleiten. Dieser Review-Artikel stellt die Prinzipien, die zugrunde liegende Analytik, und erste Anwendungsbeispiele für einige dieser Proxies vor, welche derzeit entwickelt werden. Wir diskutieren das Potential von (i) pflanzenwachsbürtigen n-Alkanen als Biomarker für die Rekonstruktion der Vegetationsgeschichte, (ii) Aminosäure Razemisierung und Glycerin-Dialkyl-Glycerin-Tetraether (GDGT) Indizes als Proxies für die Rekonstruktion der Paläotemperatur und (iii) substanzspezifischen δD and δ18O Analysen an pflanzenbürtigen n-Alkanen bzw. Zuckern für die Entwicklung von Proxies zur Rekonstruktion von Paläoklima/-aridität. Während wir versuchen, die Leserschaft für die methodischen und analytischen Neuentwicklungen und deren Potential für die Lössforschung zu begeistern, verweisen wir gleichzeitig auch auf die Limitierungen und Schwächen der jeweiligen Methoden. So müssen beispielsweise Degradationseffekte oder postsedimentäre ‚Kontamination’ bei der Interpretation von Biomarker-Rekords berücksichtigt und weiter untersucht werden. Des Weiteren könnte sich die Quantifizierung der unterschiedlichen Einflussfaktoren auf Deuterium- und 18O-Rekords als herausfordernd erweisen.

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“…A better understanding of these isotope fractionation processes could significantly increase the explanatory power of isotope‐based source apportionment studies. For instance, a multi‐isotope approach with carbon and oxygen isotopes could facilitate the identification of the aerosol origin and the source of the burned biomass …”

Section: Introductionmentioning

confidence: 99%

Oxygen isotope analysis of levoglucosan, a tracer of wood burning, in experimental and ambient aerosol samples

Blees

Saurer

Siegwolf

et al. 2017

Rapid Commun Mass Spectrom

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Feed additives: authenticity assessment using multicomponent-/multielement-isotope ratio mass spectrometry

Cited by 21 publications

References 2 publications

Compound‐specific δ¹⁸O analyses of neutral sugars in soils using gas chromatography–pyrolysis–isotope ratio mass spectrometry: problems, possible solutions and a first application

Compound‐specific δ¹⁸O analyses of neutral sugars in soils using gas chromatography–pyrolysis–isotope ratio mass spectrometry: problems, possible solutions and a first application

Novel methodological approaches in loess research – interrogating biomarkers and compound-specific stable isotopes

Oxygen isotope analysis of levoglucosan, a tracer of wood burning, in experimental and ambient aerosol samples

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Feed additives: authenticity assessment using multicomponent-/multielement-isotope ratio mass spectrometry

Cited by 21 publications

References 2 publications

Compound‐specific δ18O analyses of neutral sugars in soils using gas chromatography–pyrolysis–isotope ratio mass spectrometry: problems, possible solutions and a first application

Compound‐specific δ18O analyses of neutral sugars in soils using gas chromatography–pyrolysis–isotope ratio mass spectrometry: problems, possible solutions and a first application

Novel methodological approaches in loess research – interrogating biomarkers and compound-specific stable isotopes

Oxygen isotope analysis of levoglucosan, a tracer of wood burning, in experimental and ambient aerosol samples

Contact Info

Product

Resources

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Compound‐specific δ¹⁸O analyses of neutral sugars in soils using gas chromatography–pyrolysis–isotope ratio mass spectrometry: problems, possible solutions and a first application

Compound‐specific δ¹⁸O analyses of neutral sugars in soils using gas chromatography–pyrolysis–isotope ratio mass spectrometry: problems, possible solutions and a first application