Then, after fatty acids extraction and derivatization, this signature can be analysed by Gas Chromatography-Combustion-Isotope Ratio Mass Spectrometry (GC-C-IRMS) technique, obtaining the δ13C isotopic values of each fatty acid present in the soil. Data sets having these signatures can be used ...
The past two decades have seen Hg isotopes emerging as a powerful tool for tracing the sources and pathways of Hg in the environment22. Mercury isotopes exhibit mass-dependent fractionation (MDF, represented by δ202Hg) during almost all biotic and abiotic chemical reactions23. In contrast, large...
Barium has seven isotopes (130Ba, 132Ba, 134Ba, 135Ba, 136Ba, 137Ba, and 138Ba) and in terms of mass spectrometry behaves quite similarly to its alkaline earth companions Sr and Ca, and thus the isotopes can be measured using either TIMS or MC-ICP-MS. In catchment soils, exchangeable...
Rechargeable lithium-ion batteries (LIB) play a key role in the energy transition towards clean energy, powering electric vehicles, storing energy on renewable grids, and helping to cut emissions from transportation and energy sectors. Lithium (Li) demand is estimated to increase considerably in the...
3.2. Mass spectrometry Chromium isotopic analyses were performed with a ThermoFisher Neptune multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS) at the Open University (UK). Solutions were introduced into the mass spectrometer using an Aridus II desolvator system. Detailed descript...
Nitrate stable isotopes (δ15N-NO3− and δ18O-NO3−) were determined using the bacterial denitrifier method [28]. The analysis was performed with isotope ratio mass spectrometry (IRMS, MAT 253, Thermo Fisher, Waltham, MA, USA) at the Third Institute of Oceanography, Ministry of Natural...
With the development of novel instruments and analytical techniques over the past few decades, more precise isotope measurements using TIMS have become possible (generally better than 0.001‰) [13]. Nonetheless, a key potential advantage of multi-collector inductively coupled plasma mass spectrometry (...
CO2 was collected by using the freezing method, and the O isotopic composition of the whole-rock samples was analyzed by MAT253 gas isotopic mass spectrometry. The measurement results are defined as SMOW and marked as δ18OV-SMOW, and the analysis accuracy is better than ±0.2‰. The ...
The experimental analysis methods included two steps: chemical separation and MC–ICP–MS mass spectrometry. The former included sample digestion, centrifugal coprecipitation, ion exchange resin separation, collection as well as purification. To be specific, each sample was weighted and spiked with 233...
The greyish-white syenite porphyry is characterized by a porphyritic texture and a massive structure (Figure 2). The phenocrysts are mainly composed of sanidine (~85%) and a minor amount of biotite (~15%), which make up about 40% of the whole rock (Figure 2). The groundmass is ...