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Related Concept Videos

Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

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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Related Experiment Video

Updated: Jul 25, 2026

Fast and Accurate Exhaled Breath Ammonia Measurement
06:27

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Published on: June 11, 2014

Field intercomparison of diffusive samplers for measuring ammonia.

M Kirchner1, S Braeutigam, M Ferm

  • 1GSF-Forschungszentrum für Umwelt und Gesundheit, Institut für Okologische Chemie, Ingolstädter Landstr. 1, D-85764 Neuherberg, Germany.

Journal of Environmental Monitoring : JEM
|September 1, 2001
PubMed
Summary

Passive samplers offer a cost-effective method for monitoring atmospheric ammonia, a key agricultural pollutant. A European study found most tested passive samplers reliably measure ammonia levels, making them suitable for wider use in environmental monitoring.

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Last Updated: Jul 25, 2026

Fast and Accurate Exhaled Breath Ammonia Measurement
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Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers
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Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers

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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
08:05

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Published on: October 7, 2020

Area of Science:

  • Environmental Science
  • Atmospheric Chemistry
  • Ecology

Background:

  • Agricultural production is a significant source of atmospheric ammonia, which can harm sensitive ecosystems.
  • Accurate measurement of atmospheric ammonia is challenging due to the cost and complexity of continuous monitoring equipment.
  • Passive samplers offer a simpler, more affordable alternative for ammonia monitoring.

Purpose of the Study:

  • To compare the performance and comparability of different passive ammonia monitoring methods.
  • To evaluate the suitability of passive samplers for measuring atmospheric ammonia in rural environments.
  • To assess the influence of meteorological conditions on passive sampling accuracy.

Main Methods:

  • A collaborative European project conducted a comparative field study of ten different passive ammonia samplers.
  • A wet annular denuder system was used as a reference for on-line atmospheric ammonia measurement.
  • Meteorological parameters were recorded concurrently to analyze their impact on sampling results.

Main Results:

  • Most of the evaluated passive samplers met the required performance standards for atmospheric ammonia measurement.
  • The study demonstrated the general reliability and applicability of passive samplers in a prealpine rural setting.
  • Data indicated that passive samplers are a viable and recommended option for future ammonia monitoring initiatives.

Conclusions:

  • Passive ammonia samplers are effective and cost-efficient tools for environmental monitoring.
  • The comparability of passive samplers has improved, making them suitable for wider adoption.
  • Further research can build upon these findings to refine passive sampling techniques for atmospheric ammonia.