Principle of Optical Emission Spectrometry
Optical emission spectrometry involves applying electrical energy in the form of spark generated between an electrode and a metal sample, whereby the vaporized atoms are brought to a high energy state within a so-called "discharge plasma".
Spectral lines
These excited atoms and ions in the discharge plasma create a unique emission spectrum specific to each element, as shown at right. Thus, a single element generates numerous characteristic emission spectral lines.
Therefore, the light generated by the discharge can be said to be a collection of the spectral lines generated by the elements in the sample. This light is split by a diffraction grating to extract the emission spectrum for the target elements. The intensity of each emission spectrum depends on the concentration of the element in the sample. Detectors (photomultiplier tubes) measure the presence or absence or presence of the spectrum extracted for each element and the intensity of the spectrum to perform qualitative and quantitative analysis of the elements.
In the broader sense, optical emission spectrometry includes ICP optical emission spectrometry, which uses an inductively coupled plasma (ICP) as the excitation source. The terms "optical emission spectrometry" and "photoelectric optical emission spectrometry," however, generally refer to optical emission spectrometry using spark discharge, direct-current arc discharge, or glow discharge for generating the excitation discharge.
Shimadzu optical emission spectrometers feature Pulse Distribution Analysis (PDA) to enhance the measurement reproducibility (accuracy). This method involves statistical processing of the spark pulse-generated emission spectra obtained from spark discharges in an argon atmosphere. The optical emission spectrometer offers rapid elemental analysis of solid metal samples, making it indispensable for quality control in steel making and aluminum metallurgy processes.
News / Events
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Shimadzu has released the ICPMS-2040 Series / ICPMS-2050 Series, Inductively Coupled Plasma Mass Spectrometry
ICPMS-2040/ 2050 Series has achieved a harmonious blend of environmental-friendliness and analytical performance.
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The Shimadzu LCMS-2050 High-Performance Liquid Chromatograph Mass Spectrometer and the AA-7800 series of atomic absorption spectrophotometers have received the Red Dot Design Award 2023.
The Shimadzu LCMS-2050 High-Performance Liquid Chromatograph Mass Spectrometer and the AA-7800 series of atomic absorption spectrophotometers have received the Red Dot Design Award 2023.
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Biodegradable Plastics
In order to reduce plastic waste, the development of eco-friendly alternative materials is being promoted. As an alternative, biomass plastics and biodegradable plastics are becoming more widely available. Biodegradable Plastics are plastics that are decomposed into low-molecular compounds by microorganisms in the environment. So they break down easily in nature, which is an opposite characteristic of petroleum-based plastics.
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Jewelry, Gemstone
Various instruments are used for the appraisal of precious stones. These instruments are not limited to general gemstone appraisal tools such as the stereoscopic microscope, but also include various analytical instruments.
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Shimadzu has released AA-7800 Series Atomic Absorption Spectrophotometer
The Shimadzu Atomic Absorption Spectrophotometer AA -7800 Series is versatile enough for a variety of analytical applications (Any Application), safe and easy to use even for beginners (Any User), and offers continuous analysis using autosamplers and remote data analysis via network connections to increase the flexibility of the analysis operator's work style (Any Location).
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Application Note: "Solutions for Electronics & Chemicals"