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Atomic Absorption Spectroscopy: Instrumentation

Atomic Absorption Spectroscopy: Instrumentation

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...

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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).
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.

Atomic Emission Spectroscopy: Instrumentation

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 Absorption Spectroscopy: Overview

Atomic Absorption Spectroscopy: Overview

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...

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...

Atomic Absorption Spectroscopy: Atomization Methods

Atomic Absorption Spectroscopy: Atomization Methods

Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the aerosol...

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Updated: Jun 6, 2026

Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Published on: February 3, 2023

Fabry-Perot CCD annular-summing spectroscopy: study and implementation for aeronomy applications.

M M Coakley, F L Roesler, R J Reynolds

|December 4, 2010

Summary

This summary is machine-generated.

Fabry-Perot CCD annular-summing spectroscopy offers significant performance gains for aeronomy. This technique can reduce integration times by up to 15x for faint night sky emissions, improving sensitivity.

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Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

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Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Published on: February 3, 2023

Scattering And Absorption of Light in Planetary Regoliths

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Published on: July 1, 2019

Area of Science:

Aeronomy
Spectroscopy
Atmospheric Physics

Background:

Fabry-Perot interferometers are crucial for atmospheric studies.
Conventional scanning Fabry-Perot systems with photomultiplier detectors have limitations.

Purpose of the Study:

To discuss and evaluate the Fabry-Perot CCD annular-summing spectroscopy technique for aeronomical applications.
To optimize performance using standard CCD arrays and detail spectral calibration methods.

Main Methods:

Utilized Fabry-Perot CCD annular-summing spectroscopy.
Performed experimental evaluation against conventional scanning Fabry-Perot systems.
Calculated signal-to-noise ratios for various aeronomical scenarios.

Main Results:

Predicted sensitivity gains of 10-30 are typical.
Significant integration time savings (10-15x) for faint night sky lines (e.g., hydrogen Balmer-α).
For bright lines (e.g., thermospheric O(1)D), gains are signal-dependent, with potential outperformance by specialized CCD formats.

Conclusions:

Fabry-Perot CCD annular-summing spectroscopy provides substantial improvements in sensitivity and efficiency for aeronomical observations.
The technique is particularly advantageous for faint emission lines, overcoming CCD read noise limitations.
Optimization of CCD formats and optical configurations can further enhance performance for specific applications.