concentrations obtained by laser-ablation inductively coupled mass-spectrometry (LA-ICP-MS) in olivine concentrations were measured in situ by laser ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS measured by the sample- standard bracketing method using a Nu Plasma multi- ...

gas isotope laboratories; an analytical chemistry laboratory; the Inductively Coupled Plasma Multi-Collector Magnetic Sector mass spectrometry laboratory; and a thermal-ionization...

44 Vol. 77 No. 1 ACTA GEOLOGICA SINICA March 2003 Multi-collector ICP-MS Analysis of Pb Isotope with NBS 981 using a micromass isoprobe multi- collector inductively-coupled plasma mass spectrometer (MC-ICP-MS. Of course, significant instrumental refinement in abundance sensitivity is in demand. Key words: MC-ICP-MS

The ICP-MS samples were acidified to 1% with double-distilled HN03 under a ... MC-ICP-MS >Multi Collector Inductively Coupled Plasma Mass Spectrometers ...

Microbial activity in volcanic glass within the oceanic crust can produce micron sized pits and tunnels. Such biogenic textures have been described from the recent oceanic crust and mineralized equivalents in pillow lavas as old as 3.47-3.45 Ga from the Barberton Greenstone Belt (BGB) of South Africa. In meta-volcanic glasses these microbial traces are preserved by titanite mineralization ...

-collector ICPMS: new prospects for Quaternary geochronology Stephen M. Egginsa,�, Rainer Gru� na,b , Malcolm T. Mc using laser ablation-MC-ICPMS are explored. 234 U/238 U and 230 Th/234 U can be measured with precision-series migration during weathering and diagenesis. A drawback of laser ablation-MC-ICPMS is that it cannot

Mt. Moulton Ice Trench Mass Spectrometry Data, Antarctica ... To avoid contamination only the inner portion of each sample was used for major anion and trace element analysis. ... NO3-, SO42-) by ion chromatography (IC) and for trace elements (Na, Mg, ... MC-ICP-MS > Multi Collector Inductively Coupled Plasma Mass ...

Author's personal copy Routine isotopic analysis of iron by HR-MC-ICPMS: How precise and how Accepted 5 December 2008 Keywords: Iron isotopes HR-MC-ICPMS Chromatography Precision Accuracy High by High-Resolution Multi-Collector Inductively Coupled Plasma Mass Spectrometry (HR- MC-ICPMS). Whether

Spectrometer: Inductively Coupled Plasma (ICP-MS), High Resolution (Element XR) ______Mass Spectrometer: Inductively Coupled Plasma (ICP-MS), Multi-Collector (Neptune Plus) ______Mass Spectrometer: Inductively Coupled Plasma (ICP-MS), Ultra-High Resolution ______Mass Spectrometer: Linear Ion Trap Quadrupole (LTQ

The Cape Fynbos region of South Africa, a global biodiversity hotspot, hosted a diverse large mammal fauna till shortly after permanent European settlement (1652). How these animals survived in this exceptionally nutrient-poor environment is puzzling and it is generally believed that they restricted their movements to the more fertile shale areas. We tested the hypothesis that large herbivores ...

Several recent studies have suggested that isotopes of Fe and other mid-weight elements can be fractionated at high temperatures. Reduction-oxidation reactions have been proposed as a mechanism by which these fractionations are produced. Specifically in studies of iron meteorites that contain iron sulfide, the sulfidation reaction associated with the formation of troilite has been invoked in order ...

In their seminal paper, Allegre and Turcotte (1986) presented a model in which the upper mantle is a mixture of depleted, harzburgitic mantle and subducted basalt that has been mechanically mixed together, the mantle marble-cake. Since their publication, most studies of mantle heterogeneity have focused on the enriched components, which are equated with subducted basalt and/or sediments, and ...

Whereas colored andesine/labradorite had been thought unique to the North American continent, red andesine supposedly coming from the Democratic Republic of the Congo (DR Congo), Mongolia, and Tibet has been on the market for the last 10 years. After red Mongolian andesine was proven to be Cu-diffused by heat treatment from colorless andesine starting material, efforts were taken to distinguish ...

Uranium (U) and plutonium (Pu) isotopes in coral soils, contaminated by nuclear weapons testing in the northern Marshall Islands, were isolated by ion-exchange chromatography and analyzed by mass spectrometry. The soil samples were spiked with {sup 233}U and {sup 242}Pu tracers, dissolved in minerals acids, and U and Pu isotopes isolated and purified on commercially available ion-exchange columns. ...

The Spessart district (SW Germany), located at the southwestern margin of the Permian Kupferschiefer basin in Central Europe, hosts abundant stratabound and structurally controlled base metal mineralization. The mineralization styles identified are (1) stratabound Cu-Pb-Zn-(Ag) ores in Zechstein sedimentary rocks, (2) structurally controlled Cu-As-(Ag) ores in Zechstein sedimentary rocks, (3) ...

Magma generation and evolution processes of island-arc tholeiitic (TH) and calc-alkalic (CA) suites in the NE Japan arc have been thought that the former is produced by fractional crystallization from mantle-derived basalt magma and the latter is formed by magma mixing between basic and felsic magmas. However, based on Sr isotope micro-analyses of plagioclase phenocrysts in basalt and andesite ...

... Effects of Androgen Ablation on Anti-Tumor Immunity. ... The induction of apoptotic cell death in ... infiltrate comprised predominantly of activated T cells. ...

Laser ablation particle plume compositions are characterized using inductively coupled plasma mass spectrometry (ICP/MS). This study evaluates the mass response characteristics peculiar to ICP/MS detection as a function of laser fluence and frequency. Eva...

This report describes a standardized methodology used by researchers from the Center for Accelerator Mass Spectrometry (CAMS) (Energy and Environment Directorate) and the Environmental Radiochemistry Group (Chemistry and Materials Science Directorate) at the Lawrence Livermore National Laboratory (LLNL) for the full isotopic analysis of uranium from solution. The methodology has largely been ...

We present a concerted international effort to cross-calibrate five synthetic Th isotope standards (UCSC Th 'A'; OU Th 'U'; WUN; IRMM35; and IRMM 36), and six rock standards (UCSC TML, Icelandic ATHO; USGS BCR-2; USGS W2; USGS BHVO-2; LV18) using plasma ionization multi-collector inductively coupled mass spectrometry (PIMMS). We then compare our new values ...

-element fractionation in laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis is one is close to 1. Since laser ablation inductively coupled plasma mass spectro- metry (LA-ICP-MS) was �rst) are commonly used as an internal standard for in situ multi-element LA-ICP-MS analysis. The ...

Pulmonary vein isolation in a dual-chamber pacemaker patient using the pulmonary vein ablation catheter (PVAC) system resulted in perpetual induction of ventricular tachycardia (VT) during radio frequency energy application. Induction of VT was abolished by programming the PVAC-system to a pure bipolar ablation ...

Tungsten isotope composition of a sample of deep-seated rock can record the influence of core-mantle interaction of the parent magma. Samples of kimberlite, which is known as a carrier of diamond, from the deep mantle might exhibit effects of core-mantle interaction. Although tungsten isotope anomaly was reported for kimberlites from South Africa, a subsequent investigation did not verify the ...

Variations in Hg isotope ratios in cinnabar ores obtained from different countries were detected by high precision isotope ratio measurements using multi-collector inductively coupled mass spectrometry (MC-ICP-MS). Values of delta198/202Hg varied from 0.0-1.3 percent per thousand relative to a NIST SRM 1641d Hg solution. The typical external uncertainty of ...

The analytical performance of five sample introduction systems, a cross flow nebulizer spray chamber, two different solvent desolvation systems, a multi-mode sample introduction system (MSIS), and a hydride generation (LI2) system were compared for the determination of Se isotope ratio measurements using multi-collector inductively coupled plasma mass ...

Particle size effects and elemental fractionation in laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) are investigated with nanosecond and femtosecond laser ablation, differential mobility analysis, and magnetic sector ICP-MS. Laser...

Femtosecond and nanosecond lasers were compared for ablating brass alloys. All operating parameters from both lasers were equal except for the pulse duration. The ablated aerosol vapor was collected on silicon substrates for particle size measurements or sent into an inductively coupled plasma mass spectrometer. The diameters and size ...

The measurements of stable selenium (Se) isotopic signatures by multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) are very challenging, due to the presence of spectral interferences and the low abundance of Se in environmental samples. We systematically investigated the effect of methane addition on the signal of Se isotopes and their interferences. It ...

... development. Previously, we showed by blastomere isolation and ablation experiments that the contact between the animal and ... epidermis marker, HrTT-1. Employing blastomere isolation and ablation experi...

The capabilities and potential applications of in situ dating of Quaternary materials using laser ablation-MC-ICPMS are explored. 234U/238U and 230Th/234U can be measured with precision sufficient for dating at a spatial resolution of 100 ?m or better in samples that contain as a little as 1 ppm uranium. Moreover, U and Th concentrations and U-series isotope ratios can be ...

Performances of laser ablation have been widely explored, especially for industrial purposes. Nevertheless, some study fields remain unknown, notably the use of Infra-Red femtosecond pulses for the ablation of hard transparent materials. Thus, we present analytical results on quartz, which is the most widespread mineral in earth sciences, especially for ...

On the basis of consulting the home and abroad literatures in recent years, the research progress in the method of laser ablation solid sampling to the inductively coupled plasma source and its application in the analysis of material compositions are described. The present paper emphatically reviewed the influence of the laser-beam properties (output ...

The ablation properties and analytical behavior of a uranium-zirconium alloy have been examined using tandem laser ablation/pneumatic nebulization sample introduction in conjunction with inductively coupled atomic emission spectrometry (LA-ICP-AES). An apparent change in composition of the laser ablation aerosol ...

... with laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) , allowing a combination of high sensitivity and good spatial resolution. ...

... cell proliferation in the endometrium of women with menorrhagia and in women following endometrial ablation. Hum Reprod ... ...

LA-ICP-MS, The Laser-Ablation Inductively Coupled Mass Spectrometer Lab was part of the Maryland Geology tour. Drs. Jason Dworkin and Joeseph Nuth, July 8, ...

. simoterum Perca flavescens Percina caprodes Stizostsdion canadense Aplodinotus grunniens Cottus carolinae a

Ablation. -. 18. Distribution Statement. Unclassified - unlimited. 22. Price* ... The nitrogen plasma was generated in a radio frequency induction torch. ...

May 13, 2008 ... Atomic Absorption Spectrophotometry � ICP operator and equipment � Inductively Coupled Plasma (ICP) Atomic Emission Spectrometry ...

Jun 20, 2008... several basaltic lunar samples using a combination of solution and laser ablation inductively coupled plasma mass spectrometry (ICP-MS). ...

laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), focused ion beam extractions (FIB), secondary ion mass spectrometry or ion ...

Mar 1, 2011... and 2) analysis of run products with laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), allowing a combination of ...

By means of radioimmunoassay, the circulating ecdysteroid (molting hormone) titers have been obtained for both normal and eyestalk-ablated juvenile lobsters. It is seen that these animals, following molt induction, have rapid elevations in their hemolymph...

Mining operations in California during the past two centuries have resulted in widespread mercury contamination. Source control strategies are difficult and expensive to implement, in part because links between specific mercury sources and exposures are often uncertain. Examination of mercury�s stable isotopes can help resolve this issue. Sources with distinct isotope compositions may be traced ...

Laser ablation (LA) with inductively coupled plasma mass spectrometry (ICP-MS) has been demonstrated as a viable technology for sample characterization within the EM complex. Laser ablation systems have been set up at the Hanford Site, Savannah River Plan...

(such as ion probe or laser ablation ICP-MS) are hampered by a lack of well characterized, homogeneous micro-analyses d'�l�ments en trace (par sonde ionique ou ICP-MS avec ablation laser) sont g�n�es par l during laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) and minor changes

Plasma quenching efficiency by ablated vapor of polymers containing nitrogen atom was numerically investigated for the inductively coupled thermal plasma technique. Polyamide66 (PA66), which contains nitrogen atoms, was used for polymer materials, and it is injected into Ar thermal plasma in the numerical simulation. The simulation model considered ...

The focus of this dissertation is the use of a twin quadrupole inductively coupled plasma mass spectrometer (ICP-MS) for the simultaneous detection of two m/z values. The twin quadrupole ICP-MS is used with laser ablation sample introduction in both the s...

of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to investigate the chemical or exposure to sunlight. 5.2.1 LA-ICP-MS The concentrations of many trace elements in the zircon samples were determined by single-grain analyses using laser ablation inductively coupled plasma mass spectrometry ...

using laser-ablation MC-ICPMS Emma-Kate Pottera,, Claudine H. Stirlinga, Uwe H. Wiecherta, Alex N-ablation multiple-collector inductively coupled plasma mass spectrometry (LA MC-ICPMS). Utilising a 193 nm excimer ablation; MC-ICPMS; Coral; U-series dating 1. Introduction Late Pleistocene carbonates such as corals

to isolate Sr, REEs, U and Th Instruments: multi-collector -TIMS; multi-collector and single-collector ICP-MS; quadrupole ICP-MS, ICP-OES Leadership: From 2004-2006 I held a leadership role for two labs-9 2008. 2008 7th International SF-ICP-MS Conference and associated workshops. Hyatt Regency Hotel, New

The amount of ablated mass can influence the temperature andexcitation characteristics of the inductively coupled plasma (ICP) andmust be taken into account to ensure accurate chemical analysis. The ICPelectron number density was investigated by using measurements of the Mgionic to atomic resonant-line ratios during laser ablation of ...

The Zn-to-Cu ratio in brass was measured by laser ablation inductively coupled plasma atomic emission spectroscopy. The influence of laser beam properties (pulse width, wavelength, and power density) on fractional laser ablation was investigated. The behavior of the Zn/Cu ratio vs. laser power density shows that there are different ...

Laser ablation is becoming a dominant technology for direct solid sampling in analytical chemistry. Laser ablation refers to the process in which an intense burst of energy delivered by a short laser pulse is used to sample (remove a portion of) a material. The advantages of laser ablation chemical analysis include direct ...

A laser ablation-inductively coupled plasma-mass spectrometric (LA-ICPMS) technique utilizing a titanium-sapphire (TiS) femtosecond laser (fs-laser) has been developed for elemental and isotopic analysis. The signal intensity profile, depth of the ablation pit and level of elemental fractionation were investigated in order to evaluate the analytical ...

Hydrothermal circulation driven by igneous intrusion led to the deposition of turquoise throughout the southwestern United States and Mesoamerica. The genesis of these copper-ore deposits is unclear; conflicting hypotheses call on ascent of magmatic waters (hypogene) or descent and recirculation of meteroric waters (supergene). Copper isotope analyses were performed by ...

Corals growing in high latitude waters in Southern Australia are considered to be sensitive to changes in climate, including seasonal fluctuations in sea surface temperature. The annual nature of density bands of Plesiastrea versipora were verified using U/Th ages derived from multi-collector ICP-MS analyses and the resulting extension rates varied from an average of 1.2 mm ...

Laser ablation has become a dominant technology for directsolid sampling chemical analysis. Commonly used detection modalitiesinclude LIBS (laser induced breakdown spectroscopy) for directspectroscopic analysis from the laser-induced plasma at the samplesurface,and ICPMS (inductively coupled plasma mass spectroscopy) in whichthe ...

... fidelity in mountain whitefish. Laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) measures relative concentrations of up to 32 elements in micro-samples. This technique was applied to ...

Our research in the first year has focused on the creation of nanoparticles designed for hyperthermic tumor ablation via magnetic field heating, and the development of equipment for genetic magnetic field generation. In the area of nanoparticle fabricatio...

... Thole, J.T., and Williams, J., 2010, Using laser ablation-inductively couple plasma-mass spectrometry (LA-ICP-MS) to explore geochemical ... ...

age. This study presents geochemical data on sulfide-rich samples, in situ laser-ablation inductively coupled plasma mass spectrometry (LA�ICP�MS) of sulfide minerals, and...

youngest unit of the Chugach accretionary complex in southeastern Alaska. Using laser-ablation inductively coupled plasma mass spectroscopy, we obtained 492 detrital-zircon ages on...

PurposeOxaliplatin effect in the treatment of colorectal cancer is improved upon combination with thymidylate synthase (TS) inhibitors. Pemetrexed is polyglutamated by the folylpolyglutamate synthase (FPGS) and blocks folate metabolism and DNA synthesis by inhibiting TS, dihydrofolate reductase (DHFR) and glycinamide ribonucleotide formyltransferase (GARFT). The present study evaluates the ...

The ability to use laser ablation for preparation of art pigment samples in quantitative analysis of their elemental composition by atomic emission spectroscopy of inductively coupled plasma is shown. The proposed technique enables one to eliminate errors associated with both the influence of strong acids and the stoichiometric disruption in a sample.

Cryotherapy is a technique to ablate tissue by local induction of extremely cold temperatures. Recently, the American Urological Association Best Practice Statement recognized cryoablation of the prostate as an established treatment option for men with newly diagnosed or radiorecurrent organ-confined prostate cancer. Emerging data suggest that, in select ...

This report describes an innovative technology, laser ablation-inductively couple plasma-mass spectrometry (LA-ICP-MS), operated in a mobile laboratory, to rapidly detect thorium 230 activity levels in soil samples. This technology was demonstrated on-sit...

BackgroundPreliminary experimental studies have suggested that the in situ destruction of tumor tissue by local laser ablation (LA) may also stimulate host immunity against cancer. We investigated local and systemic induction of immune responses after laser ablation in the setting of residual tumor.MethodsA murine colorectal cancer ...

We investigate particles produced by laser irradiation and their analysis by Laser Ablation Inductively Coupled Plasma Mass Spectroscopy (LA/ICP-MS), with a view towards optimizing particle production for analysis of high level waste materials and waste glass. LA/ICP-MS has consi...

by laser ablation (LA) inductively coupled plasma mass spectrometry (ICP-MS). A compact computer-MS and the LA via serial RS-232 port. Each LA-ICP-MS analysis at a defined point includes a 60 s pre solution auto-sampler ICP-MS analysis. Each analytical cycle consists of four standards, one control

Reproducible and sensitive elemental analysis of solid samples is a crucial task in areas of geology (e.g. microanalysis of fluid inclusions), material sciences, industrial quality control as well as in environmental, forensic and biological studies. To date the most versatile detection method is mass-spectroscopic multi-element analysis. In order to obtain reproducible results, this requires ...

Reproducible and sensitive elemental analysis of solid samples is a crucial task in areas of geology (e.g. microanalysis of fluid inclusions), material sciences, industrial quality control as well as in environmental, forensic and biological studies. To date the most versatile detection method is mass-spectroscopic multi-element analysis. In order to obtain reproducible results, this requires ...

Laser ablation (LA) with inductively coupled plasma mass spectrometry (ICP-MS) has been demonstrated as a viable technology for sample characterization within the EM complex. Laser ablation systems have been set up at the Hanford Site, Savannah River Plant, the Pu immobilization program (MD), Los Alamos, and at numerous other DOE ...

. [1] We used laser ablation inductively coupled plasma mass spectrometry (LA ICP-MS) to analyze Sr laser ablation inductively coupled plasma mass spectrometry (LA ICP-MS) to analyze Sr/Ca ratios along of 6 #12;0.3-mm alumina suspension. Tissue was not removed. We assayed Sr/Ca ratios using LA ICP-MS. A 213

Pulsed laser ablation (266nm) was used to generate metal particles of Zn and Al alloys using femtosecond (150 fs) and nanosecond (4 ns) laser pulses with identical fluences of 50 J cm{sup -2}. Characterization of particles and correlation with Inductively Coupled Plasma Mass Spectrometer (ICP-MS) performance was investigated. Particles produced by ...

Laser ablation particle plume compositions are characterized using inductively coupled plasma mass spectrometry (ICP/MS). This study evaluates the mass response characteristics peculiar to ICP/MS detection as a function of laser fluence and frequency. Evaluation of the ICP/MS mass response allows deductions to be made concerning how representative the ...

Laser ablation particle plume compositions are characterized using inductively coupled plasma mass spectrometry (ICP/MS). This study evaluates the mass response characteristics peculiar to ICP/MS detection as a function of laser fluence and frequency. Evaluation of the ICP/MS mass response allows deductions to be made concerning how representative the ...