Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 57 for “"Icpms"”.
-
Method Development Using Laser Ablation And Solution Icpms And Their Application In Environmental Science And Forensic Provenance Studies
Inductively coupled plasma mass spectrometry (ICPMS) is an analytical technique that can be used to determine multiple elements and isotope ratios in a wide variety of samples. In this work, four projects are described that involve the method development using laser ablation (LA) and solution-based …
-
Direct Multielemental Analysis of Solid Samples Using Laser Ablation Inductively Coupled Plasma Mass Spectometry and Pulsed Radio Frequency Glow Discharge Mass Spectrometry
… inductively coupled plasma mass spectroscopy (LA-ICPMS) and radio frequency glow discharge mass spectroscopy (rf-GDMS). A Cetac LSX-200 laser system coupled to a LECO Renaissance ICPMS was utilized to analyze coal and ash samples prepared by incorporation into a lithium borate matrix to form a …
-
Geochemical and mineralogical analysis of pre-Columbian stone tools from La Piedra Pintada, Baja California Sur, Mexico
… the dikes and selected stone tools was done by ICPMS (Inductively Coupled Plasma Mass Spectrometry). ICPMS was used because it can provide elemental “fingerprintsâ€� that can be used to distinguish source materials and correlate specific stone tools with individual source material sites. …
-
Application of the 190Pt-186Os isotope decay system to dating platinum-group minerals
… measured by laser ablation multi-collector ICPMS (LA-MC-ICPMS), has been demonstrated as a useful geochronometric tool for detrital PGM grains. However, it is difficult to appraise the method accuracy using detrital PGM. In this thesis two examples are presented that verify the accuracy and …
-
Elemental speciation and miniaturised sample introduction studies for inductively coupled plasma mass spectrometry
… inductively coupled plasma mass spectrometry (ICPMS). The ultimate aim is to develop methods for conducting rapid speciation analysis. This is approached in two ways; firstly using liquid chromatography (LC) employing a column with a monolithic silica stationary phase, and secondly by the …
-
A comprehensive chemical examination of methylamphetamine produced from pseudoephedrine extracted from cold medication
… inductively coupled plasma mass spectrometry (ICPMS) to characterize methylamphetamine hydrochloride synthesised from precursors extracted from proprietary cold medication using three different extraction solvents. Two clandestine routes were utilized in the synthetic phase of the research, (i) …
-
An investigation into the ability of three analytical techniques to discriminate batches of methlamphetamine prepared by seven synthetic routes
… inductively coupled plasma mass spectrometry (ICPMS) to characterise methylamphetamine hydrochoride Repetitive batches of samples were prepared using seven synthetic routes commonly used by clandestine chemists (149 samples in total) and analysed by each technique to provide a robust sample set …
-
NEW TECHNIQUES FOR TRACE ELEMENT AND RADIOGENIC ISOTOPE MEASUREMENT OF DIAMONDS: THEIR APPLICATION TO DIAMOND PETROGENESIS AND SOURCE TRACING
… abundances are determined by sector-field ICPMS and isotope ratios are analysed via TIMS (Sr) and multi-collector ICPMS (Nd-Pb). To report quantitative trace element data the analyte mass we require from a given ablated sample volume is <1 pg for most elements, except for Sr, Zr, Ba which …
-
Csatolt technikák fejlesztése és alkalmazása arzénmódosulatok meghatározására
… nem jár egészségkárosító hatással. A HPLC-ICPMS vizsgálatok során az oxo-arzenocukrok mellett a tio-arzén komponensek elválasztását is megoldottam, mely során a meglévő ioncserés módszerek mellett egy további anioncserés elválasztást is alkalmaztam. A kapcsolt technikával édesvízi …
-
THE ANALYSIS OF SAMPLES WITH COMPLEX MATRICES FOR ELEMENTAL CONCENTRATION
… in order to determine its concentration via ICPMS (mass spectrometry). A high-performance liquid chromatography system was also paired with ICPMS to allow for speciation of the various As species present within the SCs. In the field of medicine, elements are used as functional groups or …
-
Recent extreme events in a tropical stalagmite: Multi-proxy records and analysis of ecosystem delta carbon-13 value sensitivity to weak climate forcing
… Inductively Coupled Plasma Mass Spectrometry (LA-ICPMS) and Scanning X-ray Fluorescence (S-XRF). A dominant, broad spectrum trace element perturbation was recorded by both methods at 1982, coincident with a major explosive eruption of the nearby trachy-andesite El Chichon volcano in Chiapas, …
-
Characterization of native and bypass human coronary artery plaque deposits from the same heart: investigation of the chemical form of calcium in human coronary artery plaque deposits
… inductively coupled plasma mass spectrometry (ICPMS), solid-state nuclear magnetic resonance (NMR), high performance liquid chromatography (HPLC), etc. The results from the ICPMS technique showed that the concentrations of Ca and P varied widely in the bypass arteries. In contrast, the …
-
Nanoparticle - Heavy Metal Associations in Riverbed Sediments
… coupled plasma mass spectroscopy (HR-ICPMS). Riverbed sediment samples were taken from the Clark Fork River in Montana, USA where a large-scale dam removal project has released reservoir sediment contaminated with toxic trace metals (namely Pb, Zn, Cu and As) which accumulated from one …
-
Nanocomposite-graphene based platform for heavy metal detection
… to inductively coupled plasma mass spectrometry (ICPMS). This was then followed by real sample analyses.
-
Az izotóparány mérés alkalmazásának lehetőségei a módosulatanalitikában és az élelmiszereredet vizsgálata során
… alkalmas tömegspektrometriás technikák közül az ICPMS (Induktív csatolású plazma tömegspektrométer) az, mely biztosítani tudja az előbbiekben felsorolt követelményeket, valamint érzékeny, multiizotópos meghatározást tesz lehetővé rövid mérési idő alatt. Mindemellett, az izotópok detektálását …
-
U-Pb geochronology of the Acasta Gneiss Complex in Northwest Canada
… coupled plasma mass spectrometery (LA-ICPMS). Twelve of the samples show evidence for two distinct crystallization events, one which formed the cores and another in which the mantle domain overgrew the cores. The oldest cores were dated at >4.0 Ga. This provides additional evidence for …
-
Rhodoliths as environmental archives in the tropics
… inductively coupled plasma mass spectrometry (LA-ICPMS) permitted to investigate the distribution pattern of Mg across single rhodolith branches. The combination of LA-ICPMS analyses with alizarin red S staining and radiocarbon dating enabled us to determine the seasonal character of the major …
-
Rhodoliths as environmental archives in the tropics
… inductively coupled plasma mass spectrometry (LA-ICPMS) permitted to investigate the distribution pattern of Mg across single rhodolith branches. The combination of LA-ICPMS analyses with alizarin red S staining and radiocarbon dating enabled us to determine the seasonal character of the major …
-
Desarrollo de metodologías de cuantificación de compuestos orgánicos basadas en dilución isotópica en línea de carbono-13 y espectrometría de masas
… sistemas de detección elementales, como el ICPMS, son capaces de generar una respuesta instrumental para un determinado elemento independiente de la especie química en que se encuentre, permitiendo utilizar un único patrón genérico para cuantificar varias especies que contengan dicho …
Page 1 of 3