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Analysis of Metallic Tungsten by HR ICP-OES on PlasmaQuant® PQ 9000
Analysis of Metallic Tungsten by HR ICP-OES on PlasmaQuant® PQ 9000
27 Jul 2015The rapid analysis of traces impurities in refractory metals and alloys is an important part of the quality-control process in the manufacture of these materials. All classical atomic spectrometry techniques, however, have major disadvantages with respect to trace detectability in these matrices, which for example arise from the high atomization temperatures (AAS), the wealth of emission lines (ICP-OES) and adverse metal oxide formation (ICPMS) of refractory elements like W, Mo, Ta and Nb. In this application note, a certified control solution supplied by a tungsten manufacturer was analyzed using the PlasmaQuant® PQ 9000.
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Atomic Absorption / Emission SpectroscopyAtomic absorption spectroscopy (AAS) and atomic emission spectroscopy (AES) — also called optical emission spectroscopy (OES) — are used to detect the elemental constituents in samples. Both techniques involve the atomization of a sample. Atomic absorption spectrometers may use a flame or furnace to create an atomic vapor of the sample before irradiation with spectral light. Optical emission spectrometers may use a flame, inductively coupled plasma (ICP), microwave plasma (MP) or spark arcs to atomize and excite the sample. At higher excitation energies, electrons can be emitted instead of photons, which can be useful for samples that can’t be atomized and for surface analysis. Explore electron spectroscopy equipment such as Auger spectrometers and photoelectron spectrometers for surface elemental analysis of samples. Find the best atomic absorption, photoelectron and optical emission spectrometers in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Environmental Monitoring and TestingEnvironmental monitoring and testing uses handheld portable analyzers, kits, spectrometers or chromatography systems for air, water, soil, food and other sample testing. Useful features of analyzers such as BOD and COD include portability, easy calibration, automation and sensitivity. Environmental test kits for pH, water, moisture, etc, should be accurate, sensitive, reliable, fast and easy to use.Particle CharacterizationParticle characterization instruments are used to determine particle size distribution, shape, surface area, zeta potential, density and porosity of particles and materials. Multiple tecchniques are available for determining particle size, shape and count including dynamic light scattering (DLS), laser diffraction, electrozone (Coulter technique), imaging particle analysis and single particle optical sensing. Determine the density of your material with a gas pycnometer or examine its surface area and porosity with gas adsorption analyzers and mercury porosimeters. Find the best particle characterization instruments in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.MetallurgyICP-MSInductively Coupled Plasma Mass Spectrometry (ICP-MS) is a powerful analytical technique used to determine the concentrations of elements and their isotopes in a variety of samples, including water, soil, and biological tissues. It involves ionizing elements in the samples with extremely high-temperature Argon (Ar) plasma and then using a mass spectrometer to measure the number of ions based on their mass-to-charge ratio (m/z). Explore ICP-MS systems in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.Trace Level ImpuritiesTrace level impurities refer to low concentrations of unwanted substances found in chemicals, pharmaceuticals, and other products. Detecting and removing these impurities is crucial for product safety and regulatory compliance. Explore trace impurity analysis tools in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.