Determining spatial sodium distribution in fresh and aged bread using laser-induced breakdown spectroscopy You must be logged in to download the Full-Text PDF or to comment. A large number of deaths can be related to the effects of too high a salt intake; in general, the intake of Na is much higher than advised.
Laser Induced Breakdown Spectroscopy LIBS is a rapid chemical analysis technology that uses a short laser pulse to create a micro-plasma on the sample surface.
This analytical technique offers many compelling advantages compared to other elemental analysis techniques. A sample preparation-free measurement experience Extremely fast measurement time, usually a few seconds, for a single spot analysis Broad elemental coverage, including lighter elements, such as H, Be, Li, C, N, O, Na, and Mg Versatile sampling protocols that include fast raster of the sample surface and depth profiling Thin-sample analysis without the worry of the substrate interference A typical detection limit of LIBS for heavy metallic elements is in the low-PPM range.
LIBS is applicable to a wide range of sample matrices Spectroscopy breakdown include metals, semiconductors, glasses, biological tissues, insulators, plastics, Spectroscopy breakdown, plants, soils, thin-paint coating, and electronic materials.
So how does LIBS work? The main physical process that forms the essence of LIBS technology is the formation of high-temperature plasma, induced by a short laser pulse. When the short-pulse laser beam is focused onto the sample surface, a small volume of the sample mass is ablated i.
This ablated mass further interacts with a trailing portion of the laser pulse to form a highly energetic plasma that contains free electronics, excited atoms and ions. Many fundamental research projects have shown that the plasma temperature can exceed 30,K in its early life time phase .
When the laser pulse terminates, the plasma starts to cool.
During the plasma cooling process, the electrons of the atoms and ions at the excited electronic states fall down into natural ground states, causing the plasma to emit light with discrete spectral peaks.
Each element in the periodic table is associated with unique LIBS spectral peaks. By identifying different peaks for the analyzed samples, its chemical composition can be rapidly determined.
Often, information on LIBS peak intensities can be used to quantify the concentration of trace and major elements in the sample.
Emitted light collection by a set of optical lens and optical fiber. Display of LIBS spectra and their subsequent analysis by the instrument software for both qualitative and quantitative elemental analysis Applied Spectra harnesses LIBS technology with its state-of-the-art elemental testing devices.
We deliver solutions that are fast, reliable, precise and environmentally friendly. Our instruments are adaptable to a variety of environments, from field testing, to manufacturing floors, to laboratory settings. Contact us to learn more.If laser-induced breakdown spectroscopy was a brand: some market considerations.
26 Apr Application of laser-induced breakdown spectroscopy for surface hardness measurements. 9 Dec Two dimensional elemental mapping by laser-induced breakdown spectroscopy.
2 Dec Laser-induced breakdown spectroscopy (LIBS) as a technique is widely used for real-time in-situ analysis of samples in every phase of matter and is especially useful in hazardous environments .
Laser-induced breakdown spectroscopy (LIBS) offers the ability to analyze soil samples with little sample preparation, provides detection of all elements in the periodic table, and has a large dynamic range (ppm to wt. %). Spectroscopy delivers peer-reviewed technical articles, practical advice, and applications solutions to enhance the efficiency of spectroscopic methods.
Nuclear Magnetic Resonance Spectroscopy. 1. Background Over the past fifty years nuclear magnetic resonance spectroscopy, commonly referred to as nmr, has become the preeminent technique for determining the structure of organic compounds. Of all the spectroscopic methods, it is the only one for which a complete analysis and interpretation of.
In honor of Spectroscopy's celebration of 30 years covering the latest developments in materials analysis, we asked a panel of experts to assess the current state of the art of laser-induced breakdown spectroscopy (LIBS), and to try to predict how technology will develop in the future.