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Nanomaterials in the Work Environment
Published in Małgorzata Pośniak, Emerging Chemical Risks in the Work Environment, 2020
Lidia Zapór, Przemysław Oberbek
Other methods can also be used to analyze the chemical composition of nanomaterials. These methods, also commonly applied to their bulk counterparts, are: Nuclear Magnetic Resonance (NMR), Raman spectroscopy, Inductively Coupled Plasma Mass Spectrometry (ICP-MS), Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES), X-ray Photoelectron Spectroscopy (XRF), Time-of-Flight Secondary Ion Mass Spectroscopy (TOF-SIMS), X-Ray Photoelectron Spectroscopy (XPS), Atomic Absorption Spectrometry (AAS), Fourier-Transform Infrared Spectroscopy (FTIR). To determine nanoparticle size as well as surface area and porosity of bulk material, the BET (Brunauer-Emmett-Teller) method is used, based on the analysis of gas adsorption isotherms. Field Flow Fractioning (FFF) is also used to analyze the size of particles in colloids and suspensions. This method uses the difference in mobility of particles of different sizes. The Tunable Resistive Pulse Sensing (TRPS) method, based on the analysis of resistance caused by the flow of nanoparticles through a membrane, allows for the determination of their volume and surface charge.
Characterisation of particles in solution – a perspective on light scattering and comparative technologies
Published in Science and Technology of Advanced Materials, 2018
Ciarán Manus Maguire, Matthias Rösslein, Peter Wick, Adriele Prina-Mello
Again, it should be noted that PTA-based methods are not the only technique suited to the characterisation of biological samples. TRPS-based systems, such as qNano Gold, can measure the size and concentration of such samples, particularly viruses and extracellular vesicles. It has been demonstrated that size exclusion chromatography and TRPS can be combined to monitor the production and purification of viral particles, for example [44].