We present an in-situ method for Th and U isotope measurements by laser ablation multi-collector inductively coupled plasma mass spectrometry (LA-MC-ICPMS) …

La technologie LIBS, l'identité d'Ablatom Les solutions analytiques développées et distribuées par Ablatom sont basées principalement sur la technique LIBS (Spectroscopie de plasma induit par laser) et permettent de détecter, identifier, localiser et/ou même quantifier les éléments chimiques d'un échantillon. Principes scientifiques de …

The boron isotope compositions of four fresh MORB glass samples from the northern EPR (15–18jN) were determined using the laser ablation technique presented here. The results indicate a narrow range of boron compositions for these samples (d11B 􏰠6.92x to 􏰠7.68x), which overlap at the 2r level.

PDF | An improved method for precise and accurate in situ determination of Sm–Nd isotopes, with high spatial resolution, and high sample throughput, in... | Find, read and cite all the research ...

L'ablation laser pulsé ou Pulsed Laser Deposition (PLD) est une technique de dépôt physique en phase vapeur (PVD), qui consiste à focaliser un laser de haute puissance sur une cible contenant les espèces chimiques du matériau à déposer. La cible et le substrat sont situés dans un bâti sous vide ou sous atmosphère réactive comme O 2.

A novel laser ablation-isotope ratio mass spectrometry (LA-IRMS) method for in situ analysis of sulfur isotopes in sulfides has been developed. Instead of the in situ reaction applied by the traditional laser microprobe, the analyte gas preparation in this method is separated temporally and spatially from the LA, resulting in improved precision ...

The overall consistency of the results is satisfactorily high, in particular between the micromill and the laser data. Although the precision of the laser data is slightly lower than analyses obtained by the other two methods (in particular with respect to δ 18O), the speed of acquisition renders laser ablation a useful reconnaissance ...

Laser ablation (LA) is potentially an interesting technique to measure natural variations (δ 44/42 Ca) of calcium isotopes in calcium-rich minerals because it allows spatial resolution and avoids micro …

The extension of the capability of the ICPMS technique is to analyze samples directly by the laser ablation technique. The combination of laser ablation and MC-ICPMS techniques can provide in situ isotopic data for various trace elements from solid geochemical samples (e.g., Hirata, 2001, Hirata and Ohno, 2001). Many geochemists …

study we compare stable C and O isotope results obtained by these three preparation techniques using continuous He-flow mass spectrometry on the same speleothem …

L'ablation au laser est une procédure qui a diverses applications dans l'industrie. Elle est également utilisée comme technique chirurgicale pour traiter divers problèmes de santé. Pour être plus précis, elle est appliquée dans le traitement des affections cutanées, en dentisterie et pour éliminer les tumeurs, y compris dans le ...

We have developed a new analytical technique for precise and accurate in situ Hf isotope ratio measurements for zircons by means of laser ablation-multiple collector-inductively coupled plasma mass spectrometry (LA-MC-ICPMS). Newly designed sample cell and N 2 mixing technique provided higher elemental sensitivity with …

A recent development in this technique is the in situ measurement of Hf isotopes in zircon by laser ablation (Thirlwall and Walder, 1995, Griffin et al., 2000, Woodhead et al., 2004, Iizuka and Hirata, 2005, Wu et al., 2006). The relative ease and rapidity of this type of analysis, reflecting the combination of new generation lasers and …

allies and sulphides. The laser ablation (LA) technique faces a series of technical hindrances to the measurements of accurate and precise stable isotope ratios, including LA induced frac-tionation, unresolved isobaric interferences and a serious lack of solid matrix-matched homogeneous standards certi ed for isotopic compositions.

Laser ablation (LA) is potentially an interesting technique to measure natural variations (δ 44/42 Ca) of calcium isotopes in calcium-rich minerals because it allows spatial resolution and avoids micro-sampling and consecutive wet chemistry. We developed a matrix-match sample/standard normalization method and used an Excite 193 nm …

DOI: 10.1016/J.CHEMGEO.2006.06.003 Corpus ID: 129629202; Stable isotope microsampling of speleothems for palaeoenvironmental studies : A comparison of microdrill, micromill and laser ablation techniques

After reviewing technical developments, this paper briefly describes the geochemical applications of in situ laser ablation techniques for in situ isotopic analysis of minerals, deciphering the petrogenesis of …

1. Introduction. In-situ analysis of δ 34 S in solid geological samples provides a powerful tool for tracing various geological and ore-forming processes which cannot be obtained by traditional bulk sample analytical techniques. There are three existing techniques for in-situ determination of sulfur isotope ratios, including secondary …

Two international zircon standards and one laboratory zircon standard were systematically measured using a Thermo Finngan Neptune MC-ICP-MS system and a New Wave UP213nm laser ablation system.The obtained ~(176)Hf/~(177)Hf ratios are 0.282700±64(2SD,N=22)for TEMORA,0.282008±25(2SD,N=26)for GJ1 and …

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PDF | On Jan 1, 2012, A. Dolphin and others published A comparison of techniques for measuring the trace element content of human teeth: Laser ablation ICPMS versus solution ICP-MS of micromilled ...

Micromill vs. laser ablation results. Laser analysis were performed along the axis of the micromilled trench of sample HOT 1 to ensure the best possible spatial …

In this study, a method for solidifying sulfide and sulfate nanoparticulate powder to prepare bracketing standards and samples for in situ S isotopic analysis using laser ablation multicollector inductively coupled plasma–mass spectrometry (LA-MC-ICP–MS) was developed. Sulfide or sulfate powder was transformed into a stable and …

Laser ablation. In situ isotopic analysis is performed using our Teledyne-Cetac Photon Machines 193nm Analyte Excite excimer laser ablation system, which ablates the sample into particle sizes on the order of a few nanometers (nm) that can then be directly ionized by the Neptune's argon plasma. This solid-state switched laser includes the HelEx ...

Micromill and in situ laser ablation sampling techniques for high spatial resolution micromill sampling eg for Sr isotope (Charlier et al 2006) or stable isotope Isotope Group (BIG) laboratory using a ThermoFinnigan Neptune equippedmicromill laserablation sampling techniques isotope labs Inquiry a New Wave MicroMill cleanMicromill and in situ ...

Apatite is a key mineral whose Sr-isotope record has a wide range of applications including palaeofluid flow studies from inorganic apatite, and past faunal/human mobility or palaeoecology using bioapatite. The incremental growth of mammalian enamel bioapatite potentially allows extraction of Sr isotopic compositions at sub-annual time-resolution …

The general concept of laser isotope separation is illus-trated in Fig. 1. When two types of atoms and molecules of different isotopic composition (A and B) have at least one non-overlapping spectral line, it is possible to excite selectively with laser light an atom or molecule (''particle''.

Laser ablation molecular isotopic spectrometry (LAMIS) is a technique that uses optical spectra of transient molecular species produced in ablation plumes in air or buffer gases (Ar, Ne, He, and N 2) for rapid isotopic analysis of solid samples (1–8). This technique is similar to laser-induced breakdown spectroscopy (LIBS), but optical ...

We present a novel method for the determination of Th and U isotopic ratios by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) …

DOI: 10.1016/J.CHEMGEO.2008.11.015 Corpus ID: 131343003; Micromill and in situ laser ablation sampling techniques for high spatial resolution MC-ICPMS U-Th dating of carbonates

Analyse de tissus par ablation laser couplée à la spectrométrie à plasma à couplage inductif. Un développement récent de l'ICP-MS, notamment en biologie, est le couplage avec une source laser utilisée pour l'échantillonnage de solides. C'est l'ablation laser (LA-ICP-MS).

The two circles to the left of the figure indicate typical laser ablation spot sizes for Hf isotope analysis as quoted in current literature studies. Clearly, when confronted with relatively large cores or rims (as shown here), or simple magmatic zircons with no cores, reliable information can be obtained with spot sizes of ∼50–70 μm, and ...

The effect of three different cone combinations on the performance of laser ablation MC-ICP-MS (Neptune plus) for the in situ Hf isotope analysis of zircon were investigated. The signal sensitivities of Hf, Yb and Lu were improved by a factor of 1.4 and 2.5, respectively, with using the X skimmer cone + standard sampler cone and the X skimmer cone + Jet …