Results 11 to 20 of about 6,159 (234)

Analysis of Compound-specific Carbon Isotopic Composition of Polycyclic Aromatic Hydrocarbons by PTV-GC-IRMS

Yankuang ceshi, 2022
BACKGROUND The carbon isotope ratio of PAHs is stable in the migration and transformation, which is an important traceability index and can be analyzed by gas chromatography-isotope ratio mass spectrometry (GC-IRMS).
XIE Manman, LIU Meimei, LING Yuan, SUN Qing   +3 more
doaj   +1 more source

Assessment of the authenticity of fruit spirits by gas chromatography and stable isotope ratio analyses

Czech Journal of Food Sciences, 2008
The gas chromatographic (GC) determination of volatile constituents and the determination of 13C/12C isotope ratios by isotope ratio mass spectrometry - IRMS analysis as well as SNIF-NMR analysis of (D/H)I and (D/H)II ratios in ethanol are prospective ...
Renata WINTEROVÁ, Renata MIKULÍKOVÁ, Jiří MAZÁČ, Pavel HAVELEC   +3 more
doaj   +1 more source

The intra-laboratory study of EIM-IRMS® (Ethanol Isotope Measurement–Isotope Ratio Mass Spectrometry) method performance with CS-qNMR (Cumulative Screening–quantitative NMR)

BIO Web of Conferences, 2023
In our earlier publications we proposed the possibility of using new EIM–IRMS® instrumental technique and analytical parameter δDn wine ethanol, which represents δ2H value of non-exchangeable hydrogen stable isotope ratio in ethanol, to improve detection
Smajlović Ivan, Kolesnov Alexander, Smajlović Margarita, Tsimbalaev Sergey, Gennady Kalabin, Ivlev Vasily, Tereshenko Galina   +6 more
doaj   +1 more source

Swedish Retirement Migrant Communities in Spain: 'Privatization, informalization and moral economy filling transnational care gaps1'

Nordic Journal of Migration Research, 2017
This article analyses the Swedish international retirement migrants (IRMs) in Spain and their consumption of domestic and eldercare services. In a transnational position and in the absence of stable structures and institutions (i.e., family, state and ...
Anna Gavanas
doaj   +1 more source

Analisis Program Preservasi Jalan Terdampak Banjir Menggunakan Model Markov Chain

Jurnal Teknik Sipil, 2023
Abstrak Dalam beberapa tahun terakhir, banjir telah menyebabkan gangguan pada sistem pengelolaan jalan dengan meningkatkan biaya rehabilitasi secara signifikan. Pada penelitian ini dilakukan analisis pengaruh banjir, lalu lintas dan riwayat penanganan
yoga bimo aulia, Russ Bona Frazila, Arno Adi Kuntoro   +2 more
doaj   +1 more source

Characterization of the PM2.5 aerosol fraction monitored at a suburban site in south-eastern Italy by integrating isotopic techniques and ion beam analysis

Frontiers in Environmental Science, 2022
Both teflon and quartz PM2.5 filters collected from January to July 2021 at the monitoring site of the Department of Mathematics and Physics of the University of Salento in Lecce (Italy) were analyzed by integrating different characterization techniques (
Salvatore Romano, Susy Pichierri, Mattia Fragola, Alessandro Buccolieri, Gianluca Quarta, Lucio Calcagnile   +5 more
doaj   +1 more source

Modification of Elemental Analysis-Stable Isotope Ratio Mass Spectrometer Combined Instrument for Determination of Sulfur Isotopes in Solid Samples

Journal of Isotopes, 2021
In this paper, the elemental analysis-stable isotope ratio mass spectrometer (EA-IRMS) is modified to testing different forms of sulfur isotope standard material and sample.
YIN Xijie;WANG Yongtao;LIU Weiwei;SU Jing
doaj   +1 more source

Establishment of a Purge and Trap Continuous-Flow Isotope Ratio Mass Spectrometer System for Analysis of Stable Nitrate Isotopes (δ¹⁵N and δ¹⁸O) in Water Samples by Ti(III) Reduction. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Pollution of surface and shallow groundwater by nitrate (NO3−$$ {\mathrm{NO}}_3^{-} $$) is a global concern, resulting in the deterioration of drinking water quality. Stable isotopes of NO3−$$ {\mathrm{NO}}_3^{-} $$ (δ15N and δ18O) can be used to trace its sources and identify prevailing biogeochemical processes.
Gcakasi MN, Stumpp C, Watzinger A.
europepmc   +2 more sources

Oxygen isotope compositions of conodonts – analytical challenges of in situ SIMS studies [PDF]

Estonian Journal of Earth Sciences, 2023
Reliable deep-time environmental and climate reconstructions are needed to understand the drivers of Earth’s system evolution over geological time. Palaeozoic temperature estimates, including reconstructions of the climate change through the Ordovician,
Alicja Wudarska, Michael Wiedenbeck, Olle Hints, Peep Männik, Aivo Lepland, Michael M. Joachimski, Frédéric Couffignal, Maria Rosa Scicchitano, Franziska D. H. Wilke   +8 more
doaj   +1 more source

Grapes from the geographical areas of the Black Sea: Agroclimatic growing conditions and evaluation of stable isotopes compositions in scientific study

BIO Web of Conferences, 2016
The report considers the agroclimatic conditions in the Black Sea districts of cultivation and processing of grapes - the Black Sea Lowland, the Crimean Peninsula and the South-west coastal areas of the Greater Caucasus.
Kolesnov Alexander, Agafonova Natalya
doaj   +1 more source