scholarly journals Dimensional characterization of gold nanorods by combining millisecond and microsecond temporal resolution single particle ICP-MS measurements

2017 ◽  
Vol 32 (12) ◽  
pp. 2455-2462 ◽  
Author(s):  
Ildikó Kálomista ◽  
Albert Kéri ◽  
Ditta Ungor ◽  
Edit Csapó ◽  
Imre Dékány ◽  
...  
Keyword(s):  
Dimensional Analysis ◽  
Temporal Resolution ◽  
Gold Nanorods ◽  
Single Particle ◽  
High Temporal Resolution ◽  
Icp Ms ◽  
Resolution Single

By combining normal and high temporal resolution spICP-MS measurements, the accurate dimensional analysis of nanorods is possible.

High-temporal-resolution, single-shot characterization of terahertz pulses

2003 ◽  
Vol 28 (18) ◽  
pp. 1710 ◽  
Author(s):  
Steven P. Jamison ◽  
Jingling Shen ◽  
A. M. MacLeod ◽  
W. A. Gillespie ◽  
D. A. Jaroszynski
Keyword(s):  
Temporal Resolution ◽  
High Temporal Resolution ◽  
Single Shot ◽  
Terahertz Pulses ◽  
Resolution Single

scholarly journals Characterization of high temporal resolution prr acquisition by fast comtec card: Deadtime, PRR desaturation, temperature calibration and retrieval.

2018 ◽  
Vol 176 ◽  
pp. 01017 ◽  
Author(s):  
Giovanni Martucci ◽  
Valentin Simeonov ◽  
Ludovic Renaud ◽  
Alexander Haefele
Keyword(s):  
Water Vapor ◽  
Temporal Resolution ◽  
Dead Time ◽  
Temporal Stability ◽  
Acquisition System ◽  
High Temporal Resolution ◽  
Temperature Calibration ◽  
Raman Lidar ◽  
Meteorological Observations

RAman Lidar for Meteorological Observations (RALMO) is operated at MeteoSwiss and provides continuous measurements of water vapor and temperature since 2010. While the water vapor has been acquired by a Licel acquisition system since 2008, the temperature channels have been migrated to a Fastcom P7888 acquisition system, since August 2015. We present a characterization of this new acquisition system, namely its dead-time, desaturation, temporal stability of the Pure Rotational Raman signals and the retrieval of the PRR-temperature.

Boron isotope analysis of coral skeletons by laser ablation MC-ICP-MS: new insights into calcification and environmental reconstruction at high temporal resolution

2020 ◽  
Author(s):  
Gavin L. Foster ◽  
Thomas B. Chalk ◽  
Christopher D. Standish
Keyword(s):  
Laser Ablation ◽  
Trace Element ◽  
Temporal Resolution ◽  
Isotope Analysis ◽  
Coral Skeleton ◽  
Boron Isotope ◽  
High Temporal Resolution ◽  
Carbonate System ◽  
Seawater Ph ◽  
Icp Ms

<p>Despite being some of the largest bio-constructions on the planet, coral reefs are made by many millions of cm- to mm-sized polyps of Scleractinian corals. Calcification occurs in a micron sized space sandwiched between the coral animal and the existing skeleton, known as the extra cellular medium (ECM). The coral animal has a tight control on the carbonate system in this space through deploying enzymatic pumps (e.g. Ca-ATPase) and secreting acidic-rich proteins. Tracking the state of the carbonate system in the ECM is therefore key to forming a mechanistic understanding of how environmental change, such as ocean acidification, influences skeletal formation and ultimately the growth and resilience of these important ecosystems.</p><p>Traditional means to examine ECM composition is through the use of micro-electrodes. While these approaches have revealed many key insights they are, by their nature, invasive.  They also only provide snap shots of information for corals grown in the laboratory. The boron isotopic composition of the coral skeleton and its boron content (expressed as B/Ca ratio) have recently emerged as a viable alternative approach to fully characterise the carbonate system in the ECM.  However, most studies employ bulk sampling techniques which require averaging across both structural elements of the coral skeleton and many months to years of growth. Laser ablation MC-ICP-MS approaches are now available as an alternative sampling protocol (e.g. Standish et al. 2019), and along with B/Ca (and other trace element) measurements this not only allows a reconstruction of the full carbonate system of the ECM from an analysis of the skeleton of any coral (cultured or wild) at unprecedented spatial and temporal resolution, but it also allows an examination of the influence of the carbonate system in the ECM on trace element incorporation. </p><p>Here we present boron isotope and trace element analyses of several tropical, reef-building, corals to examine the nature and magnitude of fine scale variation in ECM composition.  By studying corals from locations where external seawater is well known we also gain insights into trace element incorporation and whether external seawater pH can be accurately reconstructed from the boron-based proxies at weekly (or better) resolution. </p><p> </p><p>Standish, C.D., Chalk, T.B., Babila, T.L., Milton, J.A., Palmer, M.R., Foster, G.L. (2019) The effect of matrix interferences in situ boron isotope analysis by laser ablation MC-ICP-MS, Rapid Communications in Mass Spectrometry 33: 959–968 https://doi.org/10.1002/rcm.8432</p>

scholarly journals Trace elements in South America aerosol during 20th century inferred from a Nevado Illimani ice core, Eastern Bolivian Andes (6350 m asl)

2003 ◽  
Vol 3 (5) ◽  
pp. 1337-1352 ◽  
Author(s):  
A. Correia ◽  
R. Freydier ◽  
R. J. Delmas ◽  
J. C. Simões ◽  
J.-D. Taupin ◽  
...  
Keyword(s):  
20Th Century ◽  
Ice Core ◽  
Enrichment Factors ◽  
High Temporal Resolution ◽  
Wet Season ◽  
Bolivian Andes ◽  
Icp Ms ◽  
Dry Seasons ◽  
Crustal Enrichment Factors

Abstract. A 137 m ice core drilled in 1999 from Eastern Bolivian Andes at the summit of Nevado Illimani (16º 37' S, 67º 46' W, 6350 m asl) was analyzed at high temporal resolution, allowing a characterization of trace elements in Andean aerosol trapped in the ice during the 20th century. The upper 50 m of the ice core were dated by multi-proxy analysis of stable isotopes (d18O and d2H), 137Cs and Ca+2 content, electrical conductivity, and insoluble microparticle content, together with reference historical horizons from atmospheric nuclear tests and known volcanic eruptions. This 50 m section corresponds to a record of environmental variations spanning about 80 years from 1919 to 1999. It was cut in 744 sub-samples under laminar flow in a clean bench, which were analyzed by Ion Chromatography for major ionic concentration, by a particle counter for insoluble aerosol content, and by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) for the concentration of 45 chemical species from Li to U. This paper focuses on results of trace element concentrations measured by ICP-MS. The high temporal resolution used in the analyses allowed classifying samples as belonging to dry or wet seasons. During wet season elemental concentrations are low and samples show high crustal enrichment factors. During dry seasons the situation is opposite, with high elemental concentrations and low crustal enrichments. For example, with salt lakes as main sources in the region, average Li concentration during the 20th century is 0.035 and 0.90 ng g-1 for wet and dry seasons, respectively. Illimani average seasonal concentration ranges cover the spectrum of elemental concentration measurements at another Andean ice core site (Sajama) for most soil-related elements. Regional crustal dust load in the deposits was found to be overwhelming during dry season, obfuscating the contribution of biomass burning material. Marked temporal trends from the onset of 20th century to more recent years were identified for the concentrations of several trace species of anthropic origin, especially for Cu, As, Zn, Cd, Co, Ni and Cr. Among these elements, Cu shows average wet season crustal enrichment factors above 103, while the others range between 102 to about 5x102. P and K show moderate average wet season enrichment factors, suggesting an impact of natural biogenic emissions from the Amazon Basin. Pb has multiple anthropic sources in the region, from mining activities in the beginning of 20th century to automotive fuel after 1950s. From the large number of samples analyzed from Illimani, it was possible to derive an effective chemical characterization of the deposited background Andean soil dust aerosol during 20th century.

scholarly journals The Geochemistry of Pāua as a Potential Proxy for Past and Present Environmental Change

2021 ◽  
Author(s):  
◽  
Ramona Mahia White
Keyword(s):  
Growth Rate ◽  
New Zealand ◽  
High Resolution ◽  
Temporal Resolution ◽  
Environmental Conditions ◽  
Winter Season ◽  
High Temporal Resolution ◽  
Nacreous Layer ◽  
Prismatic Layer ◽  
Icp Ms

<p>Nearshore New Zealand mollusca (shellfish) have the potential to be important archives of environmental conditions and change. Ambient ocean chemistry can be incorporated into the calcium carbonate (CaCO3) shell during the life span of the mollusc providing a high resolution temporal record of the chemical and physical changes of the environments the mollusc lived in. Previous studies on foraminifera and coral have shown that the substitution of magnesium or strontium for calcium (Mg, Sr/Ca) during the formation of the CaCO3 shell is directly correlated with ocean temperatures. Other divalent cations (e.g., Sr2+, Ba2+, Pb2+) can also provide information on ambient salinity, primary productivity or nutrient levels, and local anthropogenic pollution. This study uses new geochemical techniques that have been developed to measure the trace element chemistry of CaCO3 mollusc shells at high temporal resolution, using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) in order to calibrate shell chemistry with environmental conditions. This study is the first to explore the use of the geochemistry of Haliotis iris as a potential proxy for (paleo-) environmental conditions. Pāua (Haliotis iris) were collected from six different localities around New Zealand and the Chatham Islands as well as a cultured environment (OceaNZ Blue Ltd). The shells were sectioned following the axis of maximum growth exposing both CaCO3 layers; the prismatic (predominantly calcite) and nacreous (aragonite) layers. The shells were analysed by LA-ICP-MS at 25 μm spot sizes through a high temporal transect of both layers. Observed differences in the element/Ca ratios between the prismatic and nacreous layer reflect the differing crystallinity of each layer. High temporal resolution Mg/Ca ratio data of the prismatic layer of the samples which grew in a cultured environment were compared with temperature and growth data supplied by OceaNZ Blue Ltd. The results showed that temperature was not the primary control on the uptake of Mg within the shells and that influences from biological factors including increased growth rate were also evident. Sr/Ca ratios show a weak inverse relationship with increased growth rate assumed. These results, however, are not reproducible within samples collected from the wild, showing that external factors (high wave energy, diet, predation, lack of food) place metabolic stress on the pāua. The monitoring of other element/Ca including Ba/Ca, Al/Ca, Pb/Ca and Zn/Ca ratios have the potential to provide information into the past frequency of storm events that deliver sediment into the oceans and remobilise other sediments and changing levels of environmental pollution. This is reflected through increased Al/Ca, Pb/Ca and Zn/Ca ratios during the winter season in a number of samples (n = 3) gained from the high resolution analysis of the prismatic layers. Overall, element/Ca ratios are difficult to correlate environmental conditions in samples from the wild as there are many different parameters influencing the uptake of element/Ca ratios with the shells of pāua. Uncertainties lie with a lack of understanding of the biological controls influencing pāua during biomineralisation including the transportation of the elements within organism to the extrapallial fluid to be biomineralised, ontogeny, and the rate and regularity of biomineralisation of shell material.</p>

Joint forces of direct, single particle, CE– and HPLC–inductively coupled plasma mass spectrometry techniques for the examination of gold nanoparticle accumulation, distribution and changes inside human cells

Metallomics ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 408-415 ◽  
Author(s):  
Joanna Kruszewska ◽  
Dominika Kulpińska ◽  
Ilona Grabowska-Jadach ◽  
Magdalena Matczuk
Keyword(s):  
Mass Spectrometry ◽  
Gold Nanoparticle ◽  
Single Particle ◽  
Inductively Coupled Plasma ◽  
Human Cells ◽  
Inductively Coupled ◽  
Joint Forces ◽  
Icp Ms ◽  
Plasma Mass Spectrometry

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

Rapid size characterization of silver nanoparticles by single particle ICP-MS and isotope dilution

2014 ◽  
Vol 29 (7) ◽  
pp. 1265-1272 ◽  
Author(s):  
L. Telgmann ◽  
C. D. Metcalfe ◽  
H. Hintelmann
Keyword(s):  
Silver Nanoparticles ◽  
Isotope Dilution ◽  
Single Particle ◽  
Consumer Products ◽  
Icp Ms ◽  
Size Characterization ◽  
Intensive Investigation

The increasing application of silver nanoparticles (AgNP) in consumer products and their potential release into the environment call for intensive investigation of their toxicity, stability, and fate.

Hydrodynamic chromatography coupled to single-particle ICP-MS for the simultaneous characterization of AgNPs and determination of dissolved Ag in plasma and blood of burn patients

2015 ◽  
Vol 408 (19) ◽  
pp. 5109-5124 ◽  
Author(s):  
Marco Roman ◽  
Chiara Rigo ◽  
Hiram Castillo-Michel ◽  
Ivan Munivrana ◽  
Vincenzo Vindigni ◽  
...  
Keyword(s):  
Single Particle ◽  
Burn Patients ◽  
Hydrodynamic Chromatography ◽  
Icp Ms

scholarly journals Technical Note: High temporal resolution characterization of gating response time

2016 ◽  
Vol 43 (6Part1) ◽  
pp. 2802-2806 ◽  
Author(s):  
Rodney D. Wiersma ◽  
Bradley P. McCabe ◽  
Andrew H. Belcher ◽  
Patrick J. Jensen ◽  
Brett Smith ◽  
...  
Keyword(s):  
Response Time ◽  
Temporal Resolution ◽  
Technical Note ◽  
High Temporal Resolution
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