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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,...
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

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,...
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences01:20

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences

Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and refractory oxide ion...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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.
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...

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Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy
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Published on: July 25, 2022

New type interference selective modulation spectroscopy.

T Dohi, T Suzuki

    Applied Optics
    |January 30, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A novel interference spectroscopy method uses a modified Michelson interferometer for direct photoelectric detection of spectral elements. This technique scans spectra via grating rotation and modulates signals using mirror vibration, eliminating computation.

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    Area of Science:

    • Physics
    • Spectroscopy
    • Optical Interferometry

    Background:

    • Traditional spectroscopy often requires complex computational analysis.
    • Photoelectric detection offers high sensitivity in spectral measurements.
    • Michelson interferometers are versatile tools in optical physics.

    Purpose of the Study:

    • To introduce a new, computation-free interference spectroscopy method.
    • To demonstrate photoelectric detection of spectral elements using interference.
    • To present the principle and initial results of the novel technique.

    Main Methods:

    • Utilized a modified Michelson interferometer for spectral analysis.
    • Employed photoelectric detection of interference between reflected and diffracted beams.
    • Implemented spectrum scanning via diffraction grating rotation.
    • Achieved signal modulation through reflecting mirror vibration.

    Main Results:

    • Successfully demonstrated interference spectroscopy without computational processing.
    • Obtained initial spectral data using the described photoelectric method.
    • Investigated and discussed source effects relevant to the technique.

    Conclusions:

    • The new interference spectroscopy method provides direct, computation-free spectral element detection.
    • The technique shows promise for efficient spectral analysis through optical means.
    • Further investigation into source effects can optimize performance.