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Related Concept Videos

Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

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An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
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Atomic Absorption Spectroscopy: Lab01:21

Atomic Absorption Spectroscopy: Lab

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For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
 Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...
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UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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Atomic Absorption Spectroscopy: Overview01:27

Atomic Absorption Spectroscopy: Overview

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Atomic absorption spectroscopy (AAS) is a technique used to analyze elements by measuring electromagnetic radiation (EMR) absorbed by atoms, which causes them to transition to a higher-energy orbit. The most crucial step in AAS is atomization, where the analyte is converted into gas-phase atoms, typically through a flame or furnace. Some of these atoms become thermally excited in the flame, while most remain in the ground state.
When irradiated by EMR of a particular wavelength, these...
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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.
1.0K
Spectrophotometry: Introduction01:16

Spectrophotometry: Introduction

6.3K
Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
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Characterization of Biological Absorption Spectra Spanning the Visible to the Short-Wave Infrared
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Miniaturized saturated absorption spectrometer.

K Sosa1, J Oreggioni1, H Failache2

  • 1Instituto de Ingeniería Eléctrica, Facultad de Ingeniería, Universidad de la República, J. Herrera y Reissig 565, 11300 Montevideo, Uruguay.

The Review of Scientific Instruments
|September 3, 2020
PubMed
Summary
This summary is machine-generated.

A new saturated absorption spectrometer is compact and robust, needing minimal alignment. This is achieved using a diffuse probe beam, matching the performance of larger systems in a miniaturized setup.

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Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Spectroscopy
  • Instrumentation

Background:

  • Saturated absorption spectroscopy (SAS) is a powerful technique for high-resolution atomic and molecular spectroscopy.
  • Traditional SAS setups often require complex alignment and are bulky, limiting their practical applications.
  • Miniaturization and simplification of SAS instruments are desirable for broader accessibility and field deployment.

Purpose of the Study:

  • To develop a compact and robust saturated absorption spectrometer.
  • To minimize alignment requirements in SAS systems.
  • To demonstrate comparable performance to established table-top setups in a miniaturized form factor.

Main Methods:

  • Utilized a diffuse probe beam generated by a retro-reflecting film to simplify alignment.
  • Designed and constructed a miniaturized, home-built saturated absorption spectrometer.
  • Evaluated the performance of the miniaturized setup against an optimized table-top system.

Main Results:

  • Successfully implemented a robust and compact saturated absorption spectrometer.
  • The diffuse probe beam significantly reduced alignment complexity.
  • The miniaturized setup achieved performance comparable to optimized table-top SAS systems.

Conclusions:

  • The developed spectrometer offers a robust, compact, and user-friendly alternative for high-resolution spectroscopy.
  • The use of a diffuse probe beam is an effective strategy for simplifying SAS instrumentation.
  • This miniaturized SAS system has potential for applications requiring portability and ease of use.