Number of spikes in single particle ICP-MS time scans: from the very dilute to the highly concentrated range

Author(s):  
Pierre-Emmanuel Peyneau ◽  
Martin Guillon

The particle number concentration (PNC) of dilute nanoparticle dispersions can be determined by single particle inductively coupled plasma-mass spectrometry (sp-ICP-MS). Virtually equal to zero for very dilute dispersions, the difference...

The Analyst ◽  
2019 ◽  
Vol 144 (5) ◽  
pp. 1725-1730 ◽  
Author(s):  
Xiaomin Xu ◽  
Jiyun Chen ◽  
Bangrui Li ◽  
Lijuan Tang ◽  
Jianhui Jiang

Herein, a novel 16S rRNA detection platform was achieved by combining a sandwich hybridization reaction, a single-molecule magnetic capture, and single particle-inductively coupled plasma mass spectrometry amplification.


Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5516
Author(s):  
Ibrahim Jreije ◽  
Agil Azimzada ◽  
Madjid Hadioui ◽  
Kevin J. Wilkinson

As the production and use of cerium oxide nanoparticles (CeO2 NPs) increases, so does the concern of the scientific community over their release into the environment. Single particle inductively coupled plasma mass spectrometry is emerging as one of the best techniques for NP detection and quantification; however, it is often limited by high size detection limits (SDL). To that end, a high sensitivity sector field ICP-MS (SF-ICP-MS) with microsecond dwell times (50 µs) was used to lower the SDL of CeO2 NPs to below 4.0 nm. Ag and Au NPs were also analyzed for reference. SF-ICP-MS was then used to detect CeO2 NPs in a Montreal rainwater at a concentration of (2.2 ± 0.1) × 108 L−1 with a mean diameter of 10.8 ± 0.2 nm; and in a St. Lawrence River water at a concentration of ((1.6 ± 0.3) × 109 L−1) with a higher mean diameter (21.9 ± 0.8 nm). SF-ICP-MS and single particle time of flight ICP-MS on Ce and La indicated that 36% of the Ce-containing NPs detected in Montreal rainwater were engineered Ce NPs.


2016 ◽  
Vol 408 (19) ◽  
pp. 5089-5097 ◽  
Author(s):  
Isabel Abad-Álvaro ◽  
Elena Peña-Vázquez ◽  
Eduardo Bolea ◽  
Pilar Bermejo-Barrera ◽  
Juan R. Castillo ◽  
...  

Metallomics ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 408-415 ◽  
Author(s):  
Joanna Kruszewska ◽  
Dominika Kulpińska ◽  
Ilona Grabowska-Jadach ◽  
Magdalena Matczuk

ICP-MS-based platform for the characterization of medicinally attractive nanomaterials processing inside human cells.


2020 ◽  
Vol 105 (4) ◽  
pp. 525-537 ◽  
Author(s):  
Michael C. Jollands ◽  
Irina Zhukova ◽  
Hugh St.C. O'Neill ◽  
Jörg Hermann

Abstract 26Mg tracer diffusion coefficients were determined in single crystals of pure synthetic forsterite (Mg2SiO4). Isotopically enriched powder sources both acted as the 26Mg source and buffered the activities of silica (aSiO2) at forsterite + protoenstatite (Mg2Si2O6) (high aSiO2) and forsterite + periclase (MgO) (low aSiO2). Experiments were conducted at atmospheric pressure between 1250 and 1600 °C, and at oxygen fugacities (fO2s) between 10–12 bars (CO-CO2 mix) and 10–0.7 bars (air). The resulting diffusion profiles were measured along the three principal crystallographic axes (a, b, and c; ||[100], ||[010], ||[001]) using laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS), with a quadrupole mass spectrometer. These measurements were corroborated by ion microprobe using the sensitive high resolution ion microprobe-reverse geometry (SHRIMP-RG) instrument. Mg tracer diffusion is anisotropic, with D[001] > D[010] > D[100], the difference in diffusion coefficients varying by about one order of magnitude at a given temperature with crystallographic orientation. Diffusion is faster in protoenstatite-buffered than periclase-buffered conditions, again with around one order of magnitude difference in diffusivity between buffering conditions. There is no apparent effect of fO2 on diffusion. A global fit to all data, including data from Chakraborty et al. (1994) and Morioka (1981) yields the relationship: log 10 D = log 10 D 0 ( m 2 s - 1 ) + 0 . 61 ( ± 0 . 03 ) log 10 a SiO 2 + - 359 ( ± 10 ) kJ / mol 2 . 303 R T where log10D0 is –3.15 (±0.08), –3.61 (±0.02), and –4.01 (± 0.05) m2 s–1 for the [001], [010], and [100] directions, respectively (1 s.d.). The LA-ICP-MS technique reproduces diffusion coefficients determined by SHRIMP-RG, albeit with slightly different absolute values of isotope ratios. This shows that LA-ICPMS, which is both accessible and rapid, is a robust analytical method for such tracer diffusion studies.


2020 ◽  
Vol 92 (17) ◽  
pp. 11664-11672
Author(s):  
Javier Jiménez-Lamana ◽  
Lucile Marigliano ◽  
Joachim Allouche ◽  
Bruno Grassl ◽  
Joanna Szpunar ◽  
...  

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