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New Trends in Field-Cycling NMR Technology
(Royal Society of Chemistry, 2018)
This chapter discusses different aspects related to the evolution and current state of fast field-cycling NMR technology. Technical advances affect NMR in two main ways: by extending and improving the capabilities and ...
Application of low field NMR as an alternative technique to quantification of total acid number and sulphur content in petroleum from Brazilian reservoirs
(Elsevier Sci Ltd, 2016)
Crude oils produced from different reservoirs in the world have very different chemical compositions and physicochemical properties. Naphthenic acids and sulphur content can affect the properties and impact the processing ...
Relative hydrogen index as a fast method for the simultaneous determination of physicochemical properties of petroleum fractions
(Elsevier Sci Ltd, 2017)
This work presents the use of the Relative Hydrogen Index (RHI) parameter obtained from the single-pulse Nuclear Magnetic Resonance (NMR) Free Induction Decay (FID) experiment as an efficient, fast and unique procedure for ...
Monitoring of engine oil aging by diffusion and low-field nuclear magnetic resonance relaxation
(Elsevier, 2019-04)
Time domain, also named lowfield nuclear magnetic resonance is used to monitor oil degradation by measuring relaxation and diffusion. As quality control of oils is indispensable to optimize oil change intervals while ...
H-1 low- and high-field NMR study of the effects of plasma treatment on the oil and water fractions in crude heavy oil
(ELSEVIER SCI LTDOXFORD, 2012)
The chemical and physical properties of a Brazilian heavy oil submitted to plasma treatment were investigated by H-1 low-and high-field nuclear magnetic resonance (NMR) combined to the characterization of rheological ...
Low-field nmr methods applied to the characterization of coconut cream
(Universidad de Costa Rica, 2016)
Comparison of different multivariate classification methods for the detection of adulterations in grape nectars by using low-field nuclear magnetic resonance
(Universidade Federal de Minas GeraisBrasilFAR - DEPARTAMENTO DE ALIMENTOSICX - DEPARTAMENTO DE QUÍMICAUFMG, 2020)
Mobile Low-Field H-1 NMR Spectroscopy Desktop Analysis of Biodiesel Production
(Springer WienWienAustria, 2013)
Quantification of paramagnetic ions in solution using time domain NMR. PROS and CONS to optical emission spectrometry method
(Elsevier Science Bv, 2018)
Solutions containing paramagnetic ions (PMIs) have been widely used in several industrial and agricultural applications. Although the concentrations of these ions in solutions are very important, they are rarely checked ...