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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

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Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
379
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

2.1K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
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Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview

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In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
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Research on a new multiple-screening method for laser-induced plasma spectroscopy utilizing Lorentz.

Jingjun Lin1, Panyang Dai1, Changjin Che2

  • 1Changchun University of Technology, Changchun, Jilin130012, China.

Talanta
|April 17, 2024
PubMed
Summary

This study introduces Lorentz Screening and Sensitivity and Volatility Analysis to improve Laser Induced Breakdown Spectroscopy (LIBS) by selecting high-quality spectral lines. This method enhances quantitative analysis accuracy for elements like Chromium and Nickel.

Keywords:
Laser-induced breakdown spectroscopyLorentzian fittingSensitivity and volatility analysisSpectral selection

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy

Background:

  • Accurate quantitative analysis in Laser Induced Breakdown Spectroscopy (LIBS) relies on effective screening and extraction of complex spectra.
  • Interference peaks and spectral volatility can significantly reduce analytical precision.

Purpose of the Study:

  • To develop and validate a novel, multi-stage spectral screening method for LIBS analysis.
  • To enhance the accuracy and reliability of quantitative elemental analysis using LIBS.

Main Methods:

  • Lorentz fitting is applied to symmetrical sampling standards for uniform spectral screening and elimination of adjacent interference.
  • Sensitivity and Volatility Analysis, using a Z-score method, further refines peak selection based on intensity-concentration correlation, minimizing volatility and maximizing sensitivity.
  • Selection of spectral lines with minimal interference and volatility.

Main Results:

  • Quantitative accuracy (R²) for Chromium (Cr) reached 0.9919, with an average error of 0.0566%.
  • Quantitative accuracy (R²) for Nickel (Ni) reached 0.9768, with an average error of 0.1024%.
  • The combined screening approach successfully identified high-quality characteristic spectral lines, improving model performance.

Conclusions:

  • Lorentz Screening combined with Sensitivity and Volatility Analysis offers a robust method for enhancing LIBS quantitative analysis.
  • The developed technique effectively reduces spectral interferences and improves the selection of reliable spectral lines.
  • This approach significantly boosts the precision and accuracy of elemental determination in LIBS applications.