Zobrazeno 1 - 10
of 2 492
pro vyhledávání: '"irms"'
Publikováno v:
Zhipu Xuebao, Vol 45, Iss 5, Pp 647-655 (2024)
High resolution isotope ratio mass spectrometry (HR-IRMS) is often used to measure the abundance of deuterium to verify the efficiency of isotope isolation of a cryogenic distillation column system. In order to achieve precise quantification of hydro
Externí odkaz:
https://doaj.org/article/34edd697d8d245ac9b1b2dc27aba2539
Publikováno v:
Zhipu Xuebao, Vol 45, Iss 3, Pp 401-411 (2024)
Phosphoric acid is commonly used to react with carbonates to generate carbon dioxide for determining the carbon and oxygen isotopes of carbonates by using online reaction device, for example, GasBench coupled to an isotope ratio mass spectrometer (IR
Externí odkaz:
https://doaj.org/article/64097954b1804e46991663dda0aafe7f
Autor:
Paul N. Newton, Lesley A. Chesson, Mayfong Mayxay, Arjen Dondorp, Patricia Tabernero, John D. Howa, Thure E. Cerling
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-11 (2024)
Abstract We explored whether isotope ratio mass spectrometry (IRMS) is useful to investigate the origin of falsified antimalarials. Forty-four falsified and genuine antimalarial samples (artesunate, artemether-lumefantrine, dihydroartemisinin-piperaq
Externí odkaz:
https://doaj.org/article/2c915cea4a6a4517af8b8307ad3e9793
Publikováno v:
Journal of Isotopes, Vol 36, Iss 6, Pp 646-654 (2023)
Soil carbohydrates, such as glucose and fructose, are essential components of soil organic matter (SOM). They serve as the primary carbon and energy sources for soil microorganisms and play a crucial role in regulating SOM stability, both directly an
Externí odkaz:
https://doaj.org/article/22a009821c4a49bd92b5bb98076624f8
Autor:
Yulong Huang, Daobing Wang, Qiding Zhong, Di Feng, Hongmei An, Hongwei Yue, Zhuying Wu, Luoqi Zhang, Xuewu Guo, Shuojie Wang
Publikováno v:
Journal of Agriculture and Food Research, Vol 15, Iss , Pp 100940- (2024)
In this study, we developed a method to determine the authenticity of concentrated fruit juice using the δ18O ratio of water. We utilized the gas chromatography-isotope ratio mass spectrometry (GC-IRMS) technique along with the offline isotope excha
Externí odkaz:
https://doaj.org/article/fa5e8c2188f14af699b833590eff19b9
Autor:
Anna-Akrivi Thomatou, Eleni C. Mazarakioti, Anastasios Zotos, Efthimios Kokkotos, Achilleas Kontogeorgos, Angelos Patakas, Athanasios Ladavos
Publikováno v:
Foods, Vol 13, Iss 13, p 2107 (2024)
Adulteration of high-value agricultural products is a critical issue worldwide for consumers and industries. Discrimination of the geographical origin can verify food authenticity by reducing risk and detecting adulteration. Between agricultural prod
Externí odkaz:
https://doaj.org/article/0899170de1b14ad5ab683f6a97278fe6
Autor:
Wiwik Dahani, Rita Sundari, Subandrio Somali, Irfan Marwanza, Andriyani Andriyani, Djoko Hartanto, Khuzaimah Arifin, Ratna Ediati
Publikováno v:
Jurnal Ilmiah SINERGI, Vol 27, Iss 2, Pp 271-280 (2023)
This article aimed to separate ilmenite (FeTiO3) mineral from tin tailing applying a single splitter IRMS (Induced Roll Magnetic Separator). Ilmenite mineral is the substantial main source for TiO2. This work used air table middling for feeding. The
Externí odkaz:
https://doaj.org/article/569176ff735a4f41aa3c1070fccaa129
Autor:
Roisin O' Sullivan, Raquel Cama-Moncunill, Michael Salter-Townshend, Olaf Schmidt, Frank J. Monahan
Publikováno v:
Food Chemistry: X, Vol 19, Iss , Pp 100858- (2023)
Scientifically underpinning geographic origin claims will improve consumer trust in food labels. Stable isotope ratio analysis (SIRA) is an analytical technique that supports origin verification of food products based on naturally occurring differenc
Externí odkaz:
https://doaj.org/article/b6f208375ac942749a5930cbe4de7b20
Publikováno v:
Journal of Isotopes, Vol 36, Iss 1, Pp 159-167 (2023)
Carbon-nitrogen ratio (C/N) and carbon-sulphur ratio (C/S) of unknown samples can vary greatly in the natural environment. There are also distinct differences in the ionization efficiencies of N and S elements. These factors will introduce the fluctu
Externí odkaz:
https://doaj.org/article/49cca7d98ca149b4b6dc4b0ea4ad4c5e
Autor:
LIN Shanshan
Publikováno v:
Journal of Isotopes, Vol 36, Iss 2, Pp 186-197 (2023)
Sulfur is widely distributed in nature, with various valence states such as -2, -1, 0, +4, +6, etc. The common occurrence forms include sulfate, sulfite, thiosulfate, elemental sulfur. There are obvious differences in sulfur isotopic composition in d
Externí odkaz:
https://doaj.org/article/f16e90260296465ba2a775373bad8024