نتایج جستجو برای: la icp ms
تعداد نتایج: 755946 فیلتر نتایج به سال:
Laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS) is capable of metal imaging by acquiring local spatial information. However, the preparation an appropriate standard for quantitative analysis difficult because matrices between and sample should match, homogeneity concentration in required. Hence, aim this study was to establish a highly mercury method that utilizes LA-ICP...
Inter-element fractionation in laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis is one of the major challenges for using the technique for in situ trace element determination and isotopic ratio measurement of geological, environmental and biological solid samples. Attempts have been made to reduce inter-element fractionation in LA-ICP-MS analysis. However, this f...
Concentrations of minor (Mg and Sr) and trace (Ba and U) elements in four natural calcium carbonate samples were first analyzed by inductively coupled plasma mass spectrometry (ICP-MS) after chemical dissolution and calibrated against a standard dolomite. Their homogeneities were checked by in situ laser ablation (LA) ICP-MS with 10-20 spots. The carbonate samples were measured by using a high ...
The distribution of some rare earth elements (La, Ce, Sc, and Y) in the sediment samples, collected form 56 stations in the offshore of the Persian Gulf during the Persian Gulf and Gulf of Oman Oceanographic Cruise (PGGOOS) in 2012, was studied. The elements were determined by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). The result revealed that the concentration of Ce (82 µg g-1) was...
A new matrix-matched reference material has been developed – NFHS-2-NP (NIOZ Foraminifera House Standard-2-Nano-Pellet) with element mass fractions, and isotope ratios resembling that of natural foraminiferal calcium carbonate. 180–355 µm size fraction planktic foraminifera was milled to nano-particles pressed pellets. We report information values for fractions forty-six elements measured by si...
v Chapter 1. General Introduction 1 Historical Perspectives 1 Fundamental Aspects of ICP-MS 2 ICP-MS Instrumentation 3 Blank Purity in ICP-MS 4 Previous EMLC Experiments 6 Matrix Effects in ICP-MS 7 Flow Injection in ICP-MS 9 Shielded Torch in ICP-MS 10 Dissertation Objectives and Organization 11 Figures 12 References 27 Chapter 2. Electrochemically-Modulated Liquid Chromatography for Cleaning ...
Inductively coupled plasma mass spectrometry (ICP-MS) is a suitable tool for multi-element analysis at low concentration levels. Rare earth element (REE) determinations in standard reference materials and small volumes of molten ice core samples from Antarctica have been performed with an ICP-time of flight-MS (ICP-TOF-MS) system. Recovery rates for REE in e.g. SPS-SW1 amounted to approximately...
کمپلکس دگرگونی شمال شهرکرد حاوی تودههای گرانیتی دگرگون و دگرشکل شده فراوان میباشد، توده کوچک گرانیتگنایس کوه مصلی یکی از آنهاست که در شمال استان چهارمحال و بختیاری و غرب اصفهان، در جنوب روستای عادگان رخنمون دارد. ناحیه مورد مطالعه بخشی از پهنه سنندج-سیرجان محسوب میشود. این توده به رنگ کاملاً روشن بوده و بشدت میلونیتی شده است. از نظر کانیشناسی دارای کوارتز، آلکالی فلدسپار، پلاژیوکلاز، مسکویت...
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