spectrometer Articles
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Celebrating Space Spectrometers on National Space Day
National Space Day is celebrated annually in the US on the first Friday of May; this year Space Day will be celebrated on Friday the 6th of May. The celebration was created to promote STEM amongst young people1. However, it also offers an opportunity for the public to celebrate the extraordinary achievements and opportunities space exploration provides. Here at Isotopx, we are celebrating ...
By Isotopx Ltd
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Inside the Gas Analyser – the Spectrometer
The measurement principle of several types of OPSIS gas analysers is called DOAS, which stands for differential optical absorption spectroscopy. A key component of the analyser is the “spectrometer”, a unit which separates incoming light into its individual wavelengths for subsequent recording of the light spectrum. But how does a spectrometer work?The key is an optical component called a ...
By OPSIS AB
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PoliSpectra M116 Provides Simultaneous Acquisition Breakthrough in UV-NIR Spectroscopy
HORIBA Scientific, global leader in OEM Gratings, Miniature CCD spectrometers and Scientific Camera systems and solutions, just announced a new fiber-coupled multispectra system capable of simultaneous measurement of up to 32 channels. The PoliSpectra® M116 MultiTrack Fiber Spectrometer features a concentric optical design with UV extended spectral range (below 185 nm with optional N2 purge) ...
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Moisture detection for semi gases via EP-IR Spectroscopy
Introduction EP-IR is a new technology that provides opportunities for uncharted territories One of these territories is moisture analysis What limit of detection for moisture can be achieved? EP-IRGAS Encoded Photometric-Integrated Real-Time Gas Analysis Solution Incorporates an Aspectrics 128 channel EP-IR spectrometer and an integrated CIC Photonics 6m 4Runner long path gas cell ...
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Applications of neural networks for free unfolding of experimental data from fusion neutron spectrometers
Free unfolding in neutron spectroscopy means reconstructing energy spectra from experimental data without a priori assumptions regarding their shape. Due to the ill-conditioned nature of the problem, this cannot be done analytically. Neural Networks (NNs) were applied to this task and synthetic data was used for training and testing. Results showed very consistent performance especially in the ...
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Quantitative analysis of automotive exhaust gas by Fourier Transform Infrared spectroscopy
For monitoring gaseous emissions from muffler, instruments presently used can only measure quantitatively a given pollutant. Fourier Transform Infrared (FTIR) spectroscopy can provide quantitative and online real time analysis. Calibration of our FTIR spectrometer with CO, CO2, NO, NO2 and N2O was done and the limits of quantification obtained were shown to be as low as 80 ppm. The variation ...
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What is the Inner Filter Effect?
The inner filter effect is a common problem in fluorescence spectroscopy, affecting spectral measurements in particular. In highly concentrated solutions the excitation beam is attenuated by the sample so that only the surface facing the excitation beam fluoresces strongly. The centre of the cuvette, which is imaged by the emission monochromator in the fluorescence spectrometer, has lower ...
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What is a Spectrometer?
In the broadest sense a spectrometer is any instrument that is used to measure the variation of a physical characteristic over a given range; i.e. a spectrum. This could be a mass-to-charge ratio spectrum in the case of a mass spectrometer, the variation of nuclear resonant frequencies in an NMR spectrometer or the change in the absorption and emission of light with wavelength in an optical ...
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ODIN – A Breakthrough in Deep UV Resonant Raman Instrumentation
For the last four years, with partners, IS-Instruments Ltd has had the ambition to produce a compact easy to use Deep UV resonant Raman spectrometer with the power to observe organic substances such as protein and enzyme, while providing a fluorescent-free measurement for all samples. Today, we can announce our first observations from ODIN, our Deep UV resonant Raman spectrometer which provides ...
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Characterization of aggregation phenomena by means of acoustic and electroacoustic spectroscopy
Aggregation phenomena change the particle-size distribution, replacing small particles with larger aggregates. Measuring this evolution of particle size is an apparent way to characterize aggregation phenomena. It is often desirable to perform this measurement in an intact, concentrated, dispersed system. Until recently, this kind of measurement was impossible, but the situation has improved ...
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Spectral Resolution in Raman Spectroscopy
The spectral resolution in Raman spectroscopy dictates the maximum number of spectral peaks that the spectrometer can resolve. The level of spectral resolution required is dependent on the sample and what information the user is aiming to obtain from the Raman spectrum. Five main factors determine the spectral resolution achievable: slit size, diffraction grating, spectrometer focal length, ...
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Fluorescence Spectroscopy: Measuring Fluorescence from a Sample
Fluorescence spectroscopy is a widespread analytical technique, often used for the analysis of a sample by defining the concentration of a chemical substance in a sample. However, measuring fluorescence from unknown samples can often be challenging even for experienced users. Below is a procedure for spectral measurements to help newcomers in the fluorescence spectroscopy field. Our posts on the ...
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Inside the Gas Analyser – the Interferometer
Several of OPSIS gas analyser types utilize the DOAS technology to establish the concentration of gases. To do so, we need access to absorption spectra in different wavelength regions. A fairly straight-forward way to record spectra is to use a spectrometer.However, the spectrometer device is generally at its best in ultra-violet (UV) and visible wavelength regions. It can also be used in the ...
By OPSIS AB
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Characterization of chemical polishing materials (monomodal and bimodal) by means of acoustic spectroscopy
It is shown that acoustic spectroscopy can sense the presence of a small sub-population of large particles in a concentrated dispersion of much smaller particles. The detection limit can be as low as a single one micron particle per 100 000 particles of 100 nm size. In order to achieve this high sensitivity the acoustic spectrometer must be able to measure ultrasound attenuation with a precision ...
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Combining Spectroscopy and Separation Science in Process and Emissions Monitoring
ABSTRACT Ultraviolet (UV) absorption spectroscopy provides rapid real-time analysis of many species of interest to industrial monitoring. In some applications, the presence of other interfering species obfuscates the measurement of interest and makes accurate and reliable analysis of trace components difficult. The use of auto-carrier, frontal elution chromatography in conjunction with a process ...
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Modified log-normal particle size distribution in acoustic spectroscopy
The modified log-normal distribution is a smooth continuous distribution depending on four parameters: median size, standard deviation, minimum size and maximum size. This distribution introduced by Kottler [J. Franklin Inst. 250 (1950) 339] and Irani [J. Phys. Chem. 63 (1959) 1603] gives an opportunity to restrict the particle size range. This distribution is asymmetrical on the logarithmic ...
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Considerations when Purchasing a Near-Infrared Spectrometer
Understanding the Principles of NIR Spectroscopy Near-infrared (NIR) spectrometers measure the absorption or reflection of infrared light in the wavelength range 700 nm to 2500 nm (14,300 cm-1 to 4000 cm-1). For most applications, the range 1000 nm to 2500 nm (10,000 cm-1 to 4000 cm-1) is most useful; overtone and combination vibrations involving X-H bonds, (where is X is most often C, N, or O), ...
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Edinburgh Instruments' Spectrometers used to characterise Egyptian Blue Pigment
The Edinburgh Instruments applications team and Dr Gianluca Accorsi, a Research Fellow at CNR Nanotec in Lecce, Italy, worked on the photo-physical properties of Egyptian blue pigment using our Fluorescence Spectrometers.The interest in non-invasive investigations for the study and identification of painting materials has greatly increased during the past two decades. The nature of museum objects ...
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Troubleshooting Measurements of Fluorescence Spectra
Acquiring and interpreting steady state fluorescence spectra is not always straightforward. Below we offer some advice on commonly encountered problems to help you optimise the operation of your Edinburgh Instruments spectrometer.What to do if your Fluorescence Spectra are Distorted, Show Unexpected Peaks or StepsIf you are experiencing problems with your fluorescence spectra make sure that the ...
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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 ...
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