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Related Concept Videos

Volatilization01:10

Volatilization

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Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
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The Sulfur Cycle01:22

The Sulfur Cycle

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Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
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Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

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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,...
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Factors Affecting Pulmonary Ventilation01:19

Factors Affecting Pulmonary Ventilation

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Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
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Variation of Atmospheric Pressure01:18

Variation of Atmospheric Pressure

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Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
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Vapor Pressure Lowering03:28

Vapor Pressure Lowering

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The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates:
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Related Experiment Video

Updated: Dec 22, 2025

Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber
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Surface Emissions Modulate Indoor SVOC Concentrations through Volatility-Dependent Partitioning.

David M Lunderberg1,2, Kasper Kristensen2, Yilin Tian2,3

  • 1Department of Chemistry, University of California, Berkeley, California 94720, United States.

Environmental Science & Technology
|May 8, 2020
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Summary

Indoor semivolatile organic compounds (SVOCs) concentrations are influenced by temperature and particle mass. SVOCs partition between air, surfaces, and particles, affecting indoor air quality and organic particulate matter.

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Area of Science:

  • Environmental Chemistry
  • Indoor Air Quality Research
  • Atmospheric Science

Background:

  • Semivolatile organic compounds (SVOCs) are prevalent indoors, originating from various sources.
  • Understanding SVOCs' behavior in indoor environments is crucial for assessing exposure and health risks.
  • Partitioning of SVOCs between gas, particle, and surface phases significantly impacts their airborne concentrations.

Purpose of the Study:

  • To investigate the partitioning behavior of SVOCs in indoor reservoirs.
  • To determine the influence of temperature and particle mass on airborne SVOC concentrations.
  • To explore the role of condensed-phase reservoirs in SVOC dynamics.

Main Methods:

  • Utilized semivolatile thermal desorption aerosol gas chromatography (SV-TAG) for measurements.
  • Conducted experiments in a manufactured test house (HOMEChem) and a single-family residence (H2).
  • Analyzed data for phthalate diesters and siloxanes to understand partitioning processes.

Main Results:

  • SVOC concentrations correlated with indoor air temperature, particularly for compounds with moderate vapor pressures.
  • Airborne SVOCs with lower vapor pressures correlated with airborne particle mass concentration.
  • Higher vapor pressure SVOCs showed weak or no correlation with particle mass.
  • Primary particle emission events enhanced gas-phase SVOCs from reservoirs, contributing to particulate matter.

Conclusions:

  • Volatility-dependent partitioning processes modulate airborne SVOC concentrations through interactions with surface reservoirs.
  • Temperature and particle mass are key factors influencing SVOC distribution indoors.
  • Condensed-phase reservoirs can act as sources for SVOC re-emission, especially during particle loading events.