Sulfur isotope ratio measurements of individual sulfate particles by NanoSIMS

Winterholler, B.; Hoppe, P.; Foley, Stephen F.; Andreae, Meinrat O.

doi:10.1016/j.ijms.2008.01.003

Cited by 47 publications

(46 citation statements)

References 35 publications

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“…8c), a zone devoid of secondary ion signal appeared at the center of the silica surface. This was probably due to charging (Mueller et al, 2012) and/or to topographic heterogeneity (Winterholler et al, 2008). As silica was more resistant to polishing than the epoxy, silica surfaces were often convex (Fig.…”

Section: Resultsmentioning

confidence: 99%

New highlights of phytolith structure and occluded carbon location: 3-D X-ray microscopy and NanoSIMS results

et al. 2015

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Abstract. Phytoliths contain occluded organic compounds called phytC. Recently, phytC content, nature, origin, paleoenvironmental meaning and impact in the global C cycle have been the subject of increasing debate. Inconsistencies were fed by the scarcity of in situ characterizations of phytC in phytoliths. Here we reconstructed at high spatial resolution the 3-D structure of harvested grass short cell (GSC) phytoliths using 3-D X-ray microscopy. While this technique has been widely used for 3-D reconstruction of biological systems it has never been applied in high-resolution mode to silica particles. Simultaneously, we investigated the location of phytC using nanoscale secondary ion mass spectrometry (NanoSIMS). Our data evidenced that the silica structure contains micrometric internal cavities. These internal cavities were sometimes observed isolated from the outside. Their opening may be an original feature or may result from a beginning of dissolution of silica during the chemical extraction procedure, mimicking the progressive dissolution process that can happen in natural environments. The phytC that may originally occupy the cavities is thus susceptible to rapid oxidation. It was not detected by the NanoSIMS technique. However, another pool of phytC, continuously distributed in and protected by the silica structure, was observed. Its N / C ratio (0.27) is in agreement with the presence of amino acids. These findings constitute a basis to further characterize the origin, occlusion process, nature and accessibility of phytC, as a prerequisite for assessing its significance in the global C cycle.

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Section: Resultsmentioning

confidence: 99%

New highlights of phytolith structure and occluded carbon location: 3-D X-ray microscopy and NanoSIMS results

et al. 2015

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“…Particles with a dry diameter > 5 µm (mineral dust) would be included in the cloud droplet residual fraction whether they were activated or not. The largest mineral dust particles -which could have erroneously been collected as "cloud droplet residuals" -were however not analysed, to prevent artefacts due to electrostatic charging, which would affect the correction of the instrumental mass fractionation during NanoSIMS analysis (Winterholler et al, 2008).…”

Section: E Harris Et Al: Cloud Processing During Hcct-2010mentioning

confidence: 99%

“…3.6), not to calculate δ 34 S values. The use of this instrument to analyse sulfur isotope ratios in the isotope ratio analysis mode is described in detail in Winterholler et al (2006Winterholler et al ( , 2008 and analysis conditions similar to those used for the current study are given in Harris et al (2012b), so only a brief description will be included here.…”

Section: Nanosims Analysismentioning

confidence: 99%

“…The IMF of the particles is also dependent on their matrix. The IMF correction factors for different matrices relative to BaSO 4 from Winterholler et al (2008) were used to correct for matrix-dependent IMF on the different particle types. The method for determining particle type is presented in Sect.…”

Section: Nanosims Analysismentioning

confidence: 99%

“…Many salts present in fine mode aerosol are highly volatile under the electron beam (e.g. most salts of ammonium) but more stable under Cs + bombardment (Winterholler et al, 2008). Therefore, we will treat all organic and mixed particles as mixed and consisting of secondary organic (SO) and secondary inorganic (SI) material in variable proportions, even if no SI fraction is visible in the SEM.…”

Section: Classification Of Particle Typesmentioning

confidence: 99%

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In-cloud sulfate addition to single particles resolved with sulfur isotope analysis during HCCT-2010

et al. 2014

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Abstract. In-cloud production of sulfate modifies aerosol size distribution, with important implications for the magnitude of indirect and direct aerosol cooling and the impact of SO 2 emissions on the environment. We investigate which sulfate sources dominate the in-cloud addition of sulfate to different particle classes as an air parcel passes through an orographic cloud. Sulfate aerosol, SO 2 and H 2 SO 4 were collected upwind, in-cloud and downwind of an orographic cloud for three cloud measurement events during the Hill Cap Cloud Thuringia campaign in autumn 2010 (HCCT-2010). Combined SEM and NanoSIMS analysis of single particles allowed the δ 34 S of particulate sulfate to be resolved for particle size and type.The most important in-cloud SO 2 oxidation pathway at HCCT-2010 was aqueous oxidation catalysed by transition metal ions (TMI catalysis), which was shown with single particle isotope analyses to occur primarily in cloud droplets nucleated on coarse mineral dust. In contrast, direct uptake of H 2 SO 4 (g) and ultrafine particulate were the most important sources modifying fine mineral dust, increasing its hygroscopicity and facilitating activation. Sulfate addition to "mixed" particles (secondary organic and inorganic aerosol) and coated soot was dominated by in-cloud aqueous SO 2 oxidation by H 2 O 2 and direct uptake of H 2 SO 4 (g) and ultrafine particle sulfate, depending on particle size mode and time of day. These results provide new insight into in-cloud sulfate production mechanisms, and show the importance of single particle measurements and models to accurately assess the environmental effects of cloud processing.

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Current literature in mass spectrometry

2008

J. Mass Spectrom.

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In order to keep subscribers up‐to‐date with the latest developments in their field, John Wiley & Sons are providing a current awareness service in each issue of the journal. The bibliography contains newly published material in the field of mass spectrometry. Each bibliography is divided into 11 sections: 1 Reviews; 2 Instrumental Techniques & Methods; 3 Gas Phase Ion Chemistry; 4 Biology/Biochemistry: Amino Acids, Peptides & Proteins; Carbohydrates; Lipids; Nucleic Acids; 5 Pharmacology/Toxicology; 6 Natural Products; 7 Analysis of Organic Compounds; 8 Analysis of Inorganics/Organometallics; 9 Surface Analysis; 10 Environmental Analysis; 11 Elemental Analysis. Within each section, articles are listed in alphabetical order with respect to author (4 Weeks journals ‐ Search completed at 25th. June 2008)

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Sulfur isotope ratio measurements of individual sulfate particles by NanoSIMS

Cited by 47 publications

References 35 publications

New highlights of phytolith structure and occluded carbon location: 3-D X-ray microscopy and NanoSIMS results

New highlights of phytolith structure and occluded carbon location: 3-D X-ray microscopy and NanoSIMS results

In-cloud sulfate addition to single particles resolved with sulfur isotope analysis during HCCT-2010

Current literature in mass spectrometry

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