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Related Concept Videos

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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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: Overview01:20

Atomic Emission Spectroscopy: Overview

3.1K
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...
3.1K
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

881
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...
881
Atomic Spectroscopy: Absorption, Emission, and Fluorescence01:23

Atomic Spectroscopy: Absorption, Emission, and Fluorescence

3.2K
Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
3.2K
Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

2.3K
Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
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Updated: May 5, 2026

Author Spotlight: Technologies and Challenges in Elemental Analysis of Food Samples
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Elemental analysis using differential absorption techniques.

H Rarback1, F Cinotti, C Jacobsen

  • 1National Synchrotron Light Source, Brookhaven National Laboratory, 11973, Upton, NY.

Biological Trace Element Research
|November 21, 2013
PubMed
Summary
This summary is machine-generated.

X-ray differential absorption microanalysis offers a low-dose method for analyzing trace elements in thin biological samples. This technique, using a Scanning Transmission X-ray Microscope, achieved high-resolution calcium mapping in bone.

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Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
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Area of Science:

  • Biophysics
  • Materials Science
  • Analytical Chemistry

Background:

  • Trace element analysis in biological specimens is crucial for understanding cellular processes and disease.
  • Conventional X-ray fluorescence can cause significant radiation damage to delicate hydrated biological samples.
  • Light elements (Z≲20) present unique challenges for elemental analysis in biological tissues.

Purpose of the Study:

  • To present X-ray differential absorption microanalysis as a viable technique for trace element analysis in hydrated biological specimens.
  • To demonstrate the capability of a Scanning Transmission X-ray Microscope (SXTM) for high-resolution elemental mapping.
  • To compare the radiation dose and specimen damage of absorption techniques versus X-ray fluorescence for light elements.

Main Methods:

  • Utilized X-ray differential absorption microanalysis for elemental detection.
  • Employed a Scanning Transmission X-ray Microscope (SXTM) for imaging and elemental mapping.
  • Analyzed hydrated biological specimens with thicknesses ranging from 0.1 to 5 μm.

Main Results:

  • Achieved better than 300 nm spatial resolution for elemental mapping.
  • Demonstrated a sensitivity of 5% calcium by weight in bone samples.
  • Showcased the reduced radiation dose and specimen damage compared to X-ray fluorescence for light elements.

Conclusions:

  • X-ray differential absorption microanalysis is an effective technique for trace element analysis in hydrated biological samples.
  • SXTM provides high spatial resolution and sensitivity for elemental mapping in biological tissues.
  • Future advancements aim for enhanced sensitivity (0.1%) and spatial resolution (75 nm).