Xrf Spectroscopy
Xrf Spectroscopy - Related Videos
07:45
X-ray Fluorescence (XRF)
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2023
Source: Laboratory of Dr. Lydia Finney — Argonne National Laboratory X-ray fluorescence is an induced, emitted radiation that can be used to generate spectroscopic information. X-ray fluorescence microscopy is a non-destructive imaging technique that uses the induced fluorescence emission of metals to identify and quantify their spatial distribution.
09:21
Mössbauer Spectroscopy
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2023
Source: Joshua Wofford, Tamara M. Powers, Department of Chemistry, Texas A&M University Mössbauer spectroscopy is a bulk characterization technique that examines the nuclear excitation of an atom by gamma rays in the solid state. The resulting Mössbauer spectrum provides information about the oxidation state, spin state, and electronic environment around the target atom, which, in combination, gives evidence about the electronic structure and ligand arrangement (geometry) of the molecule.
08:11
Infrared Spectroscopy
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2023
Source: Vy M. Dong and Zhiwei Chen, Department of Chemistry, University of California, Irvine, CA This experiment will demonstrate the use of infrared (IR) spectroscopy (also known as vibrational spectroscopy) to elucidate the identity of an unknown compound by identifying the functional group(s) present. IR spectra will be obtained on an IR spectrometer using the attenuated total reflection (ATR) sampling technique with a neat sample of the unknown.
09:20
X-ray Photoelectron Spectroscopy
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2023
Source: Faisal Alamgir, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA X-ray photoelectron spectroscopy (XPS) is a technique that measures the elemental composition, empirical formula, chemical state and electronic state of the elements that exist within a material. XPS spectra are obtained by irradiating a material with a beam of X-rays while simultaneously measuring the kinetic energy and number of electrons that escape from the top several...
09:26
Raman Spectroscopy for Chemical Analysis
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2023
Source: Laboratory of Dr. Ryoichi Ishihara — Delft University of Technology Raman spectroscopy is a technique for analyzing vibrational and other low frequency modes in a system. In chemistry it is used to identify molecules by their Raman fingerprint. In solid-state physics it is used to characterize materials, and more specifically to investigate their crystal structure or crystallinity. Compared to other techniques for investigating the crystal structure (e.g. transmission electron...
FAQs
Each element produces secondary X-rays at energies associated with its atomic structure after primary X-ray irradiation ejects an inner-shell electron. The resulting energy pattern indicates which elements are present, while measured intensities provide information for quantitative analysis. This combination allows chemists to distinguish elemental constituents within complex materials rather than relying only on the sample’s visible appearance or bulk classification.
Energy-dispersive and wavelength-dispersive instruments separate the emitted X-rays in different ways. Their designs create a practical balance among analytical speed, spectral resolution, and sensitivity. Energy-dispersive systems are associated with one performance profile, while wavelength-dispersive systems provide another, so instrument selection depends on whether rapid assessment, clearer separation of signals, or stronger detection capability is the primary analytical need.
X-ray energies help establish which elements contribute to a spectrum, but intensities add information needed for quantitative analysis. A signal’s measured strength can therefore support assessment of elemental amounts rather than simple presence or absence. In chemistry, considering both spectral position and intensity makes the result more informative for identifying and evaluating constituents in metals, ceramics, pigments, and other complex samples.
XRF spectroscopy can be applied to solid, powdered, liquid, and thin-film samples. This range allows the same general analytical approach to address very different chemical materials without restricting the investigation to a single physical form. Because the technique is non-destructive and generally requires minimal preparation, it is useful when preserving a sample or rapidly assessing its elemental composition is important.
A typical analysis places the selected sample in the instrument, irradiates it with primary X-rays, and measures the secondary X-rays emitted by the material. Analysts interpret the energies to determine the elements present and use the intensities for quantitative assessment. The workflow can accommodate solids, powders, liquids, or thin films, making sample form an important practical consideration.
The method is valuable when investigators need elemental information with little sample alteration. Chemistry applications include material identification and quality control, as well as analysis of geological and environmental samples. It also supports studies of metals, ceramics, pigments, and other complex materials, where non-destructive examination and minimal preparation can help preserve the specimen while supplying composition-related information.