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Related Concept Videos

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).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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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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High-throughput doubly-encoded single-pixel spectrometer with an extended aperture.

Jeremy Xuan Yu Chew, Zi Heng Lim, Yi Qi

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    This study presents a novel dispersive spectrometer using Hadamard transform encoding. This design enhances signal-to-noise ratio and simplifies in situ measurements for infrared spectroscopy applications.

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    Area of Science:

    • Spectroscopy
    • Optical Engineering
    • Infrared Technology

    Background:

    • Infrared devices are crucial for industrial, medical, and environmental monitoring.
    • Dispersive spectrometers with single-pixel detectors offer cost-effectiveness, robustness, and portability.
    • Existing designs often face trade-offs between spectral resolution and light throughput.

    Purpose of the Study:

    • To demonstrate a novel, high-throughput dispersive spectrometer.
    • To decouple spectral resolution from throughput for enhanced performance.
    • To improve signal-to-noise ratio and simplify in situ measurements.

    Main Methods:

    • Implementation of a two-stage Hadamard transform encoding process.
    • Utilizing a single-pixel detector for spectral information collection.
    • Developing a reconstruction method incorporating spatial information to remove uniform illumination requirement.

    Main Results:

    • Achieved high throughput by allowing significantly more light into the system.
    • Enhanced signal-to-noise ratio due to increased light collection.
    • Demonstrated a method to eliminate the need for uniform illumination, aiding in situ applications.

    Conclusions:

    • The proposed dispersive spectrometer offers a novel approach to enhance infrared spectroscopy.
    • The Hadamard transform encoding decouples spectral resolution from throughput, improving performance.
    • The system's design facilitates easier implementation for in situ measurements across various wavelengths.