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Related Concept Videos

Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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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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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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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).
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Raman Spectroscopy Instrumentation: Overview01:26

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

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Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
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Related Experiment Video

Updated: Jul 1, 2025

Automated, High-resolution Mobile Collection System for the Nitrogen Isotopic Analysis of NOx
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Coherent field sensing of nitrogen dioxide.

Alexander Eber, Lukas Fürst, Florian Siegrist

    Optics Express
    |March 5, 2024
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    We developed a portable visible dual-comb spectrometer for atmospheric monitoring of nitrogen dioxide (NO2). This instrument achieves high spatial resolution and sensitivity, outperforming traditional detectors for pollution gas analysis.

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    Area of Science:

    • Atmospheric Science
    • Spectroscopy
    • Environmental Monitoring

    Background:

    • Nitrogen dioxide (NO2) is a critical air pollutant.
    • Dual-comb spectroscopy is effective for atmospheric gas analysis in the infrared.
    • There is a need for advanced NO2 monitoring techniques.

    Purpose of the Study:

    • To introduce a portable dual-comb spectrometer for visible light NO2 detection.
    • To leverage the strong NO2 absorption in the visible spectrum.
    • To achieve high-resolution, sensitive atmospheric NO2 measurements.

    Main Methods:

    • Developed a portable dual-comb spectrometer centered at 517 nm.
    • Employed a multi-pass approach for kilometer-scale atmospheric interaction.
    • Utilized the strong absorption cross-section of NO2 in the visible region.

    Main Results:

    • Achieved an interaction path length of nearly one kilometer.
    • Demonstrated advanced spatial resolution of 90 meters.
    • Reached a detection sensitivity of 5 parts per billion (ppb).
    • Obtained a temporal resolution of one minute.

    Conclusions:

    • The portable dual-comb spectrometer offers a novel method for atmospheric NO2 monitoring.
    • This technology provides superior temporal resolution compared to standard chemiluminescence detectors.
    • The system enables precise and efficient detection of a key air pollutant.