%0 Journal Article %T TiO 2 nanomaterial detection in calcium rich matrices by spICPMS. A matter of resolution and treatment %+ Institut de Physique du Globe de Paris (IPGP) %+ Univ Vienna, Dept Environm Geosci & Environm Sci Res Network, Althanstr 14,UZA 2, A-1090 Vienna, Austria %+ Univ Gothenburg, Dept Marine Sci, Kristineberg 566, S-45178 Fiskebackskil, Sweden %+ Laboratoire de géochimie des Eaux (LGE) %+ Swedish University of Agricultural Sciences (SLU) %A Tharaud, Mickaël %A Gondikas, Andreas %A Benedetti, Marc, F. %A von Der Kammer, Frank %A Hofmann, Thilo %A Cornelis, Geert %Z Swedish Research CouncilC0393701IPGP multi-disciplinary program PARI Region Ile-de-France12015908 %< avec comité de lecture %@ 0267-9477 %J Journal of Analytical Atomic Spectrometry %I Royal Society of Chemistry %V 32 %N 7 %P 1400-1411 %8 2017 %D 2017 %R 10.1039/c7ja00060j %K SIGNAL %K KeyWords Plus:INDUCTIVELY-COUPLED PLASMA %K PARTICLE ICP-MS %K MASS-SPECTROMETRY %K SILVER NANOPARTICLES %K TITANIUM-DIOXIDE %K SUNSCREENS %K CHEMISTRY %K WATERS %Z Sciences of the Universe [physics]Journal articles %X High Ca concentrations in complex matrices such as river waters often hamper the detection of titanium nanomaterials (TiO2 NPs) by single particle inductively coupled plasma mass spectrometry (spICPMS), because of isobaric interference of Ca-48 on the most abundant Ti isotope (Ti-48). Several approaches were used to reduce this interference while measuring TiO2 in solutions with different Ca concentrations up to 100 mg L-1. ICP-MS/MS was used with ammonia as the reaction ceLL gas and high resoLution (HR) ICP-MS was used under different resoLution settings. These approaches were compared by measuring different Ti isotopes (Ti-47 and Ti-49). spICPMS data were then treated with a deconvoLution method to filter out dissolved signals and identify the best approach to detect the Lowest possible corresponding spherical size of TiO2 NPs (D,in). ICP-MS/MS aLLowed for an important decrease of the theoretical D-min compared to standard quadrupole ICP-MS, down to 64 nm in uLtrapure water; however the sensitivity was reduced by the reaction gas and increasing Ca concentrations also increased the D-min. The comparably higher sensitivity of HR-ICP-MS aLLowed for theoretically measuring a D-min of 10 nm in uLtrapure water. Combined with the deconvoLution analysis, the highest resoLution mode in HR-ICP-MS Leads to the Lowest D-min at high Ca concentrations, even though significant broadening of the measured mass distributions occurred for TiO2 NPs at Ca concentrations up to 100 mg L-1 %G English %L insu-02865540 %U https://insu.hal.science/insu-02865540 %~ INSU %~ UNIV-PARIS7 %~ AFRIQ %~ CNRS %~ IPGP %~ USPC %~ UNIV-PARIS