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Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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.
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

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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In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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).
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Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...

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International exercise on 124Sb photon emission intensities determination.

M-M Bé1, B Chauvenet, M-N Amiot

  • 1Laboratoire National Henri Becquerel (LNE-LNHB), CEA, LIST, F 91191 Gif-sur-Yvette Cedex, France. mmbe@cea.fr

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|February 23, 2010
PubMed
Summary

An international exercise involving eight laboratories measured the activity and photon emission intensities of Antimony-124 (124Sb). Results confirmed that activity measurement issues were not caused by the decay scheme data.

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Area of Science:

  • Nuclear physics
  • Metrology
  • Radiochemistry

Background:

  • Accurate measurement of radionuclide activity and decay properties is crucial for various scientific and industrial applications.
  • International comparisons are essential for validating measurement techniques and ensuring data consistency across different laboratories.

Purpose of the Study:

  • To conduct an international exercise (EUROMET project no. 907) to measure the activity of an Antimony-124 (124Sb) solution.
  • To determine the photon emission intensities of 124Sb decay.
  • To identify potential sources of discrepancies in activity measurements.

Main Methods:

  • Distribution of a homogeneous 124Sb solution to eight participating laboratories.
  • Measurement of photon emission intensities in both absolute and relative terms by six laboratories.
  • Compilation and analysis of results, including previously published data.

Main Results:

  • A consistent decay scheme for 124Sb was established based on the combined results.
  • The study demonstrated that activity measurement problems were not attributable to uncertainties in the decay scheme data.
  • Agreement was observed among the participating laboratories regarding photon emission intensity measurements.

Conclusions:

  • The established decay scheme for 124Sb is reliable and consistent.
  • Discrepancies in previous activity measurements of 124Sb are likely due to factors other than decay scheme inaccuracies.
  • The international exercise successfully validated measurement techniques and contributed to improved metrology for 124Sb.