Related Experiment Video

Updated: Jul 6, 2026

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
09:57

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems

Published on: February 10, 2020

Measurements of benzene concentration by difference-frequency laser absorption spectroscopy

W Chen, F Cazier, F Tittel

    Applied Optics
    |March 21, 2008
    PubMed

    More Related Videos

    Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown09:40

    Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

    Published on: February 14, 2014

    A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks10:13

    A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

    Published on: April 28, 2023

    Related Concept Videos

    UV–Vis Spectroscopy: Beer–Lambert Law01:09

    UV–Vis Spectroscopy: Beer–Lambert Law

    The Beer-Lambert law describes the relationship between absorbance and concentration, which combines the principles established by scientists Johann Heinrich Lambert and August Beer. Lambert's law states that when light passes through a medium, the loss in intensity is directly proportional to the original intensity and the path length of the light. Beer's law proposed that the transmittance of a solution remains constant if the product of concentration and path length is constant. The modern...
    Atomic Absorption Spectroscopy: Lab01:21

    Atomic Absorption Spectroscopy: Lab

    For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
     Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing nebulizer...
    IR and UV–Vis Spectroscopy of Carboxylic Acids01:28

    IR and UV–Vis Spectroscopy of Carboxylic Acids

    In IR spectroscopy of carboxylic acids, the C=O bond shows a characteristic band between 1710 and 1760 cm⁻¹, and the O–H bond exhibits a broad band between 2500 and 3300 cm⁻¹.
    However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency, 1710 cm−1. The C=O bond of the...
    ¹H NMR Signal Integration: Overview00:58

    ¹H NMR Signal Integration: Overview

    The intensity of a signal, which can be represented by the area under the peak, depends on the number of protons contributing to that signal. The area under each peak is shown as a vertical line called an integral, with the integral value listed under it, as seen in the proton NMR spectrum of benzyl acetate. Each integral value is divided by the smallest integral value to obtain the ratio of the number of protons producing each signal. The ratio reveals the relative number of protons and not...
    NMR Spectroscopy: Chemical Shift Overview01:15

    NMR Spectroscopy: Chemical Shift Overview

    The position of the absorption signal of a sample is reported relative to the position of the signal of tetramethylsilane (TMS), which is added as an internal reference while recording spectra. The difference between the absorption frequencies of the sample and TMS (in Hz) is divided by the spectrometer operating frequency (in MHz) to obtain a dimensionless quantity called the chemical shift. It is reported on the δ (delta) scale and expressed in parts per million.
    For instance, the proton...
    Spectroscopy of Carboxylic Acid Derivatives01:26

    Spectroscopy of Carboxylic Acid Derivatives

    Infrared spectroscopy is primarily used to determine the types of bonds and functional groups. In carboxylic acid derivatives, a typical carbonyl bond absorption is observed around 1650–1850 cm−1. For esters, the absorption is recorded at around 1740 cm−1, while acid halides show the absorption at about 1800 cm−1. Another acid derivative, the acid anhydrides, exhibit two carbonyl absorption around 1760 cm−1 and 1820 cm−1, arising from the symmetrical and unsymmetrical carbonyl vibration.
    In the...