Article
Geochemistry & Geophysics
Lei Zhong, Jianwei Peng, Jianzhang He, Yong Du, Teng Xing, Jing Li, Wenyi Guo, Qian Ni, Jun Hu, Huyue Song
Summary: The elemental analyzer-isotope ratio mass spectrometer (EA-IRMS) technique is commonly used for measuring nitrogen isotope ratio in various environmental samples. However, analyzing samples with low nitrogen content has limitations due to significant sample dilution. In this study, modifications were made to the instrument and analytical conditions to improve sensitivity and reduce sample size requirement. The results showed that reducing the carrier gas flow rate and increasing the split ratio significantly increased sensitivity.
APPLIED GEOCHEMISTRY
(2023)
Review
Ecology
Matthew D. Ramirez, Alexi C. Besser, Seth D. Newsome, Kelton W. McMahon
Summary: This study conducted a meta-analysis to investigate sources of variability in primary producer AA nitrogen isotope data, finding that vascularization is a greater source of variability than habitat type. Results show that variation in beta(Glx-Phe) values is two times greater than previously considered, and the relative influence of beta values dissipates at higher trophic levels.
METHODS IN ECOLOGY AND EVOLUTION
(2021)
Article
Food Science & Technology
Blanka Bilic Rajs, Ivana Flanjak, Dusanka Milojkovic-Opsenica, Zivoslav Tesic, Frane Cacic-Kenjeric, Ljiljana Primorac
Summary: The aim of this study was to investigate the relationship between stable isotope ratios and the botanical origin of honey. The research found significant differences among various honey types in Croatia, and the PCA analysis successfully distinguished different types of honey.
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
(2023)
Article
Chemistry, Analytical
Christine E. Mathew, Vinai K. Rai, Chelsea Ottenfeld, Russ Keller
Summary: Isotope dilution mass spectrometry using traceable standards as spikes combined with isotope ratio measurements by thermal ionization or inductively coupled plasma mass spectrometer instruments is the preferred methodology for element content determinations and isotopic composition measurements in various applications, especially those involving highly radioactive isotopes like the actinide elements. This technique takes advantage of modern mass spectrometry instrumentation sensitivity to minimize material usage and enables automated measurement sequences with minimal analyst intervention.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Biochemical Research Methods
Hiroto Kawashima, Otoha Yoshida, Nana Suto
Summary: The study introduced a new method combining anion-exchange resin, denitrifying bacteria, and samples with low concentrations of NO3- to achieve high-precision and accurate analysis. This method can be easily and inexpensively applied to aerosols as well as samples from various locations such as rivers, oceans, and Antarctica.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2021)
Article
Biochemical Research Methods
Tal Alon, Aviv Amirav
Summary: This article evaluates the utility of MAA and IAA in deriving elemental formulas on unit resolution MS data, finding that using both methods together results in improved accuracy. Under nonideal conditions, IAA can accurately determine the count of certain heteroatoms, while MAA alone cannot pinpoint exact elemental formulas.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2021)
Article
Chemistry, Analytical
Katrin Sommer, Stephanie Krauss, Walter Vetter
Summary: The study analyzed the stable carbon and nitrogen isotope signatures of cultivated button mushrooms to determine their growth medium. Results showed that the investigated mushrooms from the German market primarily used C(3) plant materials as carbon sources, with over 50% of the samples related to high shares of animal manures in the compost mixture. The minimal variation in stable nitrogen isotope values over subsequent years indicated a high level of standardization in individual cultivation processes.
ANALYTICAL LETTERS
(2021)
Article
Food Science & Technology
Kiattipong Kamdee, Sasiwimon Naksuriyawong, Nichtima Uapoonphol, Ratchai Fungklin, Jeerawat Esor, Vorapot Permnamtip, Sang-arun Meepho, Kunchit Judprasong
Summary: Honey in Thailand is used in various commercial products and it is challenging to control its production quality due to its multiple sources. Adulteration with undeclared added sugars is a common problem in the honey industry. This study found that 60% of the commercial honey samples collected contained undeclared added sugars.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2023)
Review
Engineering, Environmental
Noshan Bhattarai, Shuxiao Wang, Yuepeng Pan, Qingcheng Xu, Yanlin Zhang, Yunhua Chang, Yunting Fang
Summary: This review explores analytical techniques for measuring δN-15(NH3) and δN-15(NH4+), sampling methods for atmospheric NH3 and NH4+, and source apportionment of NH3 based on isotopes in urban areas. Challenges include collecting representative samples of emission sources and understanding isotopic fractionation during gas-to-particle conversion under different environmental conditions. Further experimental and theoretical work is needed to improve isotope-based source apportionment of NH3.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
Article
Biochemical Research Methods
Jong Wha Lee, Myung Chul Lim, Youngran Lim, Gizachew Betru Tegegn, Kyoung-Seok Lee
Summary: The development of a novel coffee bean matrix certified reference material (CRM) for elemental analysis is described. The CRM was prepared by processing green coffee beans into a dry homogeneous powder. Mass fractions of elements in the CRM were measured using double isotope dilution inductively coupled plasma mass spectrometry (double ID-ICP-MS), and measurement results for eight elements (Mg, Ca, Fe, Cu, Zn, Cd, Hg, and Pb) of sufficient quality were certified.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Marcus Oelze, Daniel A. Frick, Sarah A. Gleeson
Summary: The fsLASS-ICP-MS technique allows for simultaneous determination of sulfur isotope ratios and trace element chemistry in a wide selection of sulfides and sulfates, achieving high precision quantification of major and trace elements in sulfide minerals. While LASS shows lower sensitivity and higher limits of detection compared to direct use of LA-ICP-MS, the compromise is acceptable due to the additional information gained from obtaining isotopic and elemental compositions simultaneously.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Biochemical Research Methods
Pablo A. Perez, Felipe Docmac, Chris Harrod
Summary: This study examined the potential effects of different grinding methods on the isotopic composition of marine taxa samples. The results showed that grinding samples did not significantly alter the isotopic composition, indicating that mill-grinding is an appropriate method for sample homogenization.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2022)
Article
Physiology
Colin A. Lee, Elena V. Romanova, Bruce R. Southey, Rhanor Gillette, Jonathan V. Sweedler
Summary: This study investigates peptides in nudipleuran gastropods and finds differences in peptide profiles among different neurons. The unique behaviors in nudipleurans may be related to the peptide profiles of these neurons.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Chemistry, Analytical
Agnieszka Priebe, Emese Huszar, Marek Nowicki, Laszlo Petho, Johann Michler
Summary: TOF-SIMS is an analytical technique with nanometer resolution and excellent sensitivity, but potential mass interference issues can be overcome by introducing fluorine gas to the sample surface, leading to improved data reliability and chemical image resolution.
ANALYTICAL CHEMISTRY
(2021)
Article
Fisheries
Rose M. Boardman, Adrian C. Pinder, Adam T. Piper, Catherine Gutmann Roberts, Rosalind M. Wright, John Robert Britton
Summary: The effects of ethanol preservation on the C-13 and N-15 values of European eel tissues were studied. Preservation enriched the C-13 values of fin and mucus, but not dorsal muscle. This enrichment happened within the first 15 days and was independent of eel mass. The effects on N-15 values were negligible. These tissue-specific isotopic shifts should be taken into account when using ethanol-preserved eel samples.
JOURNAL OF FISH BIOLOGY
(2023)
Article
Geochemistry & Geophysics
Mark E. Hodson, Liane G. Benning, Bea Demarchi, Kirsty E. H. Penkman, Juan D. Rodriguez-Blanco, Paul F. Schofield, Emma A. A. Versteegh
GEOCHEMICAL TRANSACTIONS
(2015)
Editorial Material
Geography, Physical
A. L. Prendergast, E. A. A. Versteegh, B. R. Schoene
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2017)
Article
Geochemistry & Geophysics
Emma A. A. Versteegh, Hubert B. Vonhof, Simon R. Troelstra, Ron J. G. Kaandorp, Dick Kroon
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2010)
Article
Geochemistry & Geophysics
Emma A. A. Versteegh, Stuart Black, Matthew G. Canti, Mark E. Hodson
GEOCHIMICA ET COSMOCHIMICA ACTA
(2013)
Article
Geosciences, Multidisciplinary
Emma A. A. Versteegh, Hubert B. Vonhof, Simon R. Troelstra, Dick Kroon
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2011)
Article
Geosciences, Multidisciplinary
Veerle Beelaerts, Maite Bauwens, Emma Versteegh, Frank Dehairs, Rik Pintelon
MATHEMATICAL GEOSCIENCES
(2011)
Article
Geology
Emma A. A. Versteegh, Simon R. Troelstra, Hubert B. Vonhof, Dick Kroon
Article
Soil Science
Emma A. A. Versteegh, Stuart Black, Mark E. Hodson
SOIL BIOLOGY & BIOCHEMISTRY
(2014)
Article
Oceanography
Emma A. A. Versteegh, Cindy L. Van Dover, Loic Van Audenhaege, Max Coleman
Summary: Alvinocaridid shrimp occur in dense assemblages near venting orifices and have episymbiotic bacteria that rely on vent fluids for nourishment. However, they are also found in sparsely distributed populations in peripheral areas where there is little vent fluid flux. Through gut content and stable isotope analyses, it was found that central populations rely solely on episymbionts, while peripheral populations have diverse nourishment sources including bacteria and crustaceans.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2023)
Article
Geochemistry & Geophysics
E. A. A. Versteegh, S. Black, M. E. Hodson
APPLIED GEOCHEMISTRY
(2017)
Proceedings Paper
Geochemistry & Geophysics
Mark E. Hodson, Stuart Black, Loredana Brinza, Daniel Carpenter, Denise C. Lambkin, J. Fred W. Mosselmans, Barbara Palumbo-Roe, Paul F. Schofield, Tom Sizmur, Emma A. A. Versteegh
GEOCHEMISTRY OF THE EARTH'S SURFACE GES-10
(2014)
Article
Geosciences, Multidisciplinary
E. A. A. Versteegh, H. R. Vonhof, S. R. Troelstra, D. Kroon
NETHERLANDS JOURNAL OF GEOSCIENCES-GEOLOGIE EN MIJNBOUW
(2010)
Article
Ecology
E. A. A. Versteegh, M. E. Blicher, J. Mortensen, S. Rysgaard, T. D. Als, A. D. Wanamaker
