Related Concept Videos
01:25Atomic 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...
01:21Atomic Absorption Spectroscopy: Lab
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 nebulizer...
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing nebulizer...
01:22Atomic 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.
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Related Experiment Video
Updated: Jul 12, 2026
12:22
Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films
Published on: November 9, 2015
Size fractionation methods: measuring plutonium in respirable dust.
Science (New York, N.Y.)
|November 17, 1978
Summary
Investigating plutonium inhalation hazards revealed that disrupting soil particle associations increases plutonium activity in fine soil fractions (<10 micrometers). This finding is crucial for accurate risk assessment of contaminated soils.
Area of Science:
- Environmental Science
- Radiochemistry
- Occupational Health
Background:
- Soil contamination with plutonium poses significant inhalation risks.
- Accurate assessment of plutonium bioavailability in soil is critical for environmental safety.
Purpose of the Study:
- To investigate methods for evaluating the inhalation hazard of plutonium-contaminated soil.
- To understand how soil fractionation affects plutonium distribution.
Main Methods:
- Four soil fractionation procedures were applied to soil samples from Rocky Flats.
- Soil samples were separated into three size fractions, focusing on particles <10 micrometers.
Main Results:
- Disrupting in situ particle associations increased soil mass and plutonium activity in the <10 micrometer fraction.
Conclusions:
- Soil fractionation methods significantly impact the distribution of plutonium.
- Disruptive forces in analysis can yield results unrelated to ambient conditions, affecting inhalation hazard assessment.