spectroscopy Articles

  • FTIR Spectroscopy

    Fourier Transform Infrared (FTIR) Spectroscopy bases its functionality on the principle that almost all molecules absorb infrared light. Only the monatomic (He, Ne, Ar, etc) and homopolar diatomic (H2, N2, O2, etc) molecules do not absorb infrared light. Molecules only absorb infrared light at those frequencies where the infrared light affects the dipolar moment of the molecule. In a molecule, ...


    By CIC Photonics, Inc.

  • Encoded photometric infrared spectroscopy

    General Principle The EP-IR system contains the encoder-spectrograph, as well as a real-time embedded micro-processor for signal analysis, data treatment, and Chemometrics (quantitative) analysis in a single small-footprint enclosure. Operation Principle An infrared polychromatic beam is emitted from an external source (e.g. glow bar) onto the sample. Then ...


    By CIC Photonics, Inc.

  • Beginners Guide to Spectroscopy - Transmission

    This is the first part of our introduction to Spectroscopy, more can be found on our blog (http://specac.blogspot.co.uk). Introduction Transmission spectroscopy is the oldest and simplest technique for analysing samples in infrared. This ...


    By Specac Limited

  • What is a Spectrometer?

    The characteristics of a white LED light differs greatly, when compared to a yellow CFL. Without any special tools, one can see that the LED emits a clear white color, while the CFL generates yellow light. Going one step further, using a spectrometer, one will be able to “dissect” the light sources and see that they are composed of other colors in the visible light spectrum, such as ...


    By Larson Electronics LLC

  • Choosing the Right H2S Analyzer for Your Specific Application

    Not all H2S analyzers are created equal, and certain H2S analyzers work better on different applications than they do others. Significant amounts of time, money and headaches can be saved by learning about the different H2S analyzer principles of operation and choosing the correct analyzer for your ...


    By Analytical Systems Keco

  • New ways for Metal Recycling

    REWAVE XRF 3-way-sorting in innovative  “Free-Fall”-design Recycling of metal and aluminium knows no limits because it can be remelted as scrap indefinitely. Metals, however have to be separated from non-metallic impurities, and different metals have to be sorted in pure fractions to be used as secondary raw materials substituting primary resources. Especially when it ...

  • Nanoholes in metals with applications to sensors and spectroscopy

    In this paper, we review our experimental and theoretical investigations of nano-holes in metal films. Our first contribution to this field was to demonstrate experimentally that the shape of the holes in arrays could be used to influence the optical properties; in particular, we showed how to control the polarisation with elliptical nano-holes. A theory explaining this shape-effect was presented ...


    By Inderscience Publishers

  • Nanoparticles and nanowires: synchrotron spectroscopy studies

    This paper reviews the research in nanomaterials conducted in our laboratory in the last decade using conventional and synchrotron radiation techniques. While preparative and conventional characterisation techniques are described, emphasis is placed on the analysis of nanomaterials using synchrotron radiation. Materials of primary interests are metal nanoparticles and semiconductor nanowires and ...


    By Inderscience Publishers

  • Using Spectroscopy for Used Oil Analysis

    Evaluating the wear condition of equipment is a primary requirement of condition monitoring programs. Oil wetted equipment will generate wear particles throughout its lifetime, the nature and rate of the wear varies from initial ...


    By Spectro Scientific

  • Ultrafast laser spectroscopy of semiconductor nanocrystals

    Ultrafast laser spectroscopy is an efficient tool for investigation of ultrafast processes in nanostructures. We have been involved in the picosecond and femtosecond laser spectroscopy of semiconductor nanocrystals since the mid–1990s. This paper aims to review some of our results and to illustrate the potential of ultrafast laser spectroscopy in the research of semiconductor ...


    By Inderscience Publishers

  • Rotating angled plate diffusing wave spectroscopy

    Solid–like non–ergodic samples can be difficult to study using standard single speckle diffusing wave spectroscopy as the measurement may lack requisite ensemble averaging. We demonstrate here that this required ensemble averaging can be induced by translating the speckle over the collection optics so that multiple speckles are observed over the duration of the experiment. Translation is achieved ...


    By Inderscience Publishers

  • Diffuse reflectance spectroscopy using a handheld FTIR

    As has been previously discussed (1), FTIR spectroscopy is emerging as a technique that can be effectively used for applications and/or in locations that heretofore would be considered too demanding. The development of portable FTIRs, and more recently handheld FTIRs, is significant because it enables this powerful analytical technique to solve problems for a whole range of new applications, both ...


  • Nanoapertures for AFM–based single–molecule force spectroscopy

    Simultaneous single–molecule force spectroscopy and microfluorescence binding measurements are often hampered by background fluorescence from the bulk. Zero–Mode Waveguides (ZMW) restrict the excited volume but require a special design, which allows the tip of the force probing cantilever to protrude into the nanoaperture. Here, we describe the design and fabrication of such ZMW and report the ...


    By Inderscience Publishers

  • Overcoming hydrogen-bonding in on-line spectroscopy of hydrofluoric acid

    Measure ppm Impurities On-line in HF Benefits Reduce - Grab Sampling, Exposure Improve - Turnaround, Precision, Process Control Challenges Materials Compatibility Unusual properties of HF Could not reproduce in laboratory Lab Instrument in plant environment ...


    By CIC Photonics, Inc.

  • Wastewater salinity assessment using near infrared spectroscopy

    The visible and near infrared spectroscopy is a fast and inexpensive non-destructive technique for the prediction of concentrations of salts in wastewater. Conventional chemical methods are usually used, which are very accurate, take more time and require special techniques for sampling, storing and pretreatment of wastewater. In this work we studied the spectral characteristics of water and the ...


    By IWA Publishing

  • Analysis of Sewage and Sewage Sludge by Simultaneous ICP Spectroscopy

    In recent years, the development and expansion of sewage treatment facilities has resulted in increased amounts of sludge which is generated in the treatment process, and which has presented a problem due to processing of the sludge itself. Sludge is normally incinerated or solidified and then disposed of in landfills or recycled for use in construction materials such as concrete or ...

  • Synchrotron radiation, soft-X-ray spectroscopy and nanomaterials

    Both synchrotron radiation based soft-X-ray absorption spectroscopy (XAS) and resonant soft-X-ray emission spectroscopy (XES) on a variety of nano-structured systems has yielded characteristic fingerprints. With high-resolution monochromatized synchrotron radiation excitation, resonant inelastic X-ray scattering (RIXS) has emerged as a new source of information about electronic structure and ...


    By Inderscience Publishers

  • The use of portable and handheld Raman spectroscopy for forensic investigations

    The Raman technique is gaining widespread acceptance as an investigative tool for forensic applications. This article focuses on the use of portable and handheld Raman spectroscopy in the field of forensic science and illustrates it with real-world examples. The benefits of Raman spectroscopy are well recognized for the molecular identification of unknown molecular compounds and as a result the ...


    By B&W Tek

  • Your new favourite analysis method: spectroscopy highlights

    By 2020 the process spectroscopy sector is anticipated to be worth billions by 2020. What does this mean for Fourier Transform Infrared spectroscopy (FTIR)? The versatile technique is taking over due to how quick, easy and accurate its analysis is. Below are some ...


    By Specac Limited

  • The structure and origin of dissolved organic matter studied by UV-vis spectroscopy and fluorescence spectroscopy in lake in arid and semi-arid region

    To develop a proper indicator which could predict water quality and trace pollution sources is critically important for the management of sustainable aquatic ecosystem. In our study, seven water samples collected from Wuliangsuhai Lake in Inner Mongolia were used. UV-visible spectra and synchronous fluorescence spectra were applied to investigate the humification degree and aromatic structure of ...


    By IWA Publishing

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