fluorescence spectrometer Articles
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Optimized Photoluminescence Quantum Yield in Upconversion Composites considering the Scattering, Inner Filter Effects, Thickness, Self Absorption, and Temperature
Introduction Optimising upconversion (UC) composites is challenging as numerous effects influence their unique emission mechanism. Low scattering mediums increase the number of dopants excited, however, high scattering mediums increase the UC efficiency due to its non-linear power dependency. Scattering also leads to greater thermal effects and emission saturation at lower excitation power ...
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Emission Correction in a Fluorescence Spectrometer
When fluorescence spectra are measured in Edinburgh Instruments fluorescence spectrometers, two types of correction can be applied to the spectra; excitation and emission correction. In this blog post we focus on the role of emission correction and discuss why it is required, how it is implemented, and the effect it has on the shape of fluorescence spectra.Why is Emission Correction Required?The ...
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Excitation Correction in a Fluorescence Spectrometer
When fluorescence spectra are measured in Edinburgh Instruments fluorescence spectrometers, two types of correction can be applied to the spectra; excitation and emission. In our previous blog post, we focused on emission correction and its role in the detection system. Now we turn our attention to excitation correction.Fluorescence spectrometers use xenon arc lamps as the excitation source for ...
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EDXRF Analysis of Sulfur and Other Elements in Oil
The concentrations of sulfur substances in fuel oil, which greatly contribute to air pollution and acid rain, are regulated by law in many countries, and these regulations are becoming stricter with the growing concern about their impact on the environment and the consequences for society. Here, using the easy-to-operate EDX-720 energy dispersive X-ray fluorescence spectrometer, we determined the ...
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Quantitative Analysis of Fluorine (9F) by EDXRF
Fluorine compounds possess a wide range of properties, including flame retardance, water repellency, anti-fouling property, and heat resistance, and are therefore used in a wide range of fields from articles for everyday use to semiconductors. However, since the 1980s, the problems of global warming and ozone depletion in addition to the potential for bioaccumulation have led to strengthened ...
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10-Fold Quantum Yield Improvement of Ag₂S Nanoparticles by Fine Compositional Tuning
Introduction Ag₂S semiconductor nanoparticles (NPs) are near-infrared luminescent probes with outstanding properties (good biocompatibility, optimum spectral operation range, and easy biofunctionalization) that make them ideal probes for in vivo imaging. Ag₂S NPs have, indeed, made possible amazing challenges including in vivo brain imaging and advanced diagnosis of the cardiovascular system. ...
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High-Sensitivity Small-Size X-Ray Fluorescence Spectrometers
Using a small X-ray tube, X-ray fluorescence analysis can achieve a high seneitivity through such means as appropriate geometrical arrangement, pretreatment and total reflection. This article outlines relevant X-ray element technologies, with a focus on high-sensitivity small-size X-ray fluorescence analysis that is being developed by a researchers' team including the author. This method permits ...
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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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Electrocatalytic degradation of bromocresol green wastewater on Ti/SnO2-RuO2 electrode
Thermal decomposition method was employed to prepare a Ti/SnO2-RuO2 electrode, on which electrocatalytic degradation of bromocresol green (BCG) was investigated in detail. Scanning electron microscopy, an X-ray diffraction analyzer and an X-ray fluorescence spectrometer were adopted to characterize the morphology, crystal structure and element analysis of the as-prepared Ti/SnO2-RuO2 ...
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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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Virtual Spectrometer & Microscope Demos
Investing in a new optical spectrometer is an important decision for any research group; with a wide range of options available. To aid you in selecting the ideal spectrometer and configuration for your research we would like to invite you for a virtual visit to our Applications Lab in Scotland.Virtual demos are available for our range of photoluminescence, Raman, and transient absorption ...
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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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Quantitative analysis of iron in flour
Abstract A quantitative analysis of Iron in flour via Xenemetrix EDXRF Laboratory Spectrometer System was performed by model EX-3600M. The minimum detection limit for Fe in flour matrix was determined to 0.8 ppm at 3 sigma. Objective To design an easy method by using EDXRF technique for quick and convenient measurements of Fe in flour at the level of tens of ppm. Background EDXRF is a ...
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Application Note - Comparison of minimum detection limits on X-Calibur with SDD detyector or Si-PIN diode detector
ABSTRACT - The minimum detection limits of several different elements in water and in oil solutions were determined on X-Calibur with a SDD detector installed or a Si-PIN diode detector installed. The MDL was determined at 3 sigma and 300 seconds acquisition times. The result is reported here. OBJECTIVE - To perform a quantitative comparison between the performance of X-Calibur with a SDD ...
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Minimum detection limits of several different elements in water and in oil
Abstract The minimum detection limits of several different elements in water and in oil solutions were determined on X-Calibur with a SDD detector installed or a Si-PIN diode detector installed. The MDL was determined at 3 sigma and 300 seconds acquisition times. The result is reported here. Objective To perform a quantitative comparison between the performance of X-Calibur with a SDD ...
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What is Quantum Yield?
The IUPAC definition of quantum yield (Φ) is the number of a certain event occurring per photon absorbed by the system.1However, it is most commonly written specifically for the emission of light (photoluminescence) by a system2-5 This narrower definition is often simply called quantum yield; with the emission of light being implicit given the context. However, the terms fluorescence, ...
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Choosing Detectors for your FLS1000 Photoluminescence Spectrometer
The FLS1000 Photoluminescence Spectrometer can be equipped with up to 5 different detectors (8 if two emission monochromators are present), and there is a wide range to choose from including analogue, high-speed detectors or NIR-sensitive photomultiplier tubes (PMTs). In this blog post we help you to select the best photomultiplier detector for your application, either when you first buy an ...
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Second Order Diffraction through a Monochromator – Common Errors in Fluorescence Spectroscopy
In this post we discuss the phenomena of second order diffraction through a monochromator and the problems it can cause in fluorescence spectroscopy. This is the second in a series of blog posts (read first blog post) where we discuss the most common errors made, and experimental artefacts that appear when measuring fluorescence spectra. This list was originally inspired by the ...
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Understanding the health and environmental risks of microplastics
Research has shown that tiny pieces of plastic are almost everywhere—in the air, water, food, and even in the human body—but it's unclear what risks nano- and microplastics pose to the environment or human health. Researchers are using lessons from nanotoxicology to begin investigating the risks of microplastics, according to a cover story in Chemical & Engineering News, the ...
By Matexcel
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Quantitative Analysis of Geological Samples- X-Calibur
Abstract Quantitative and qualitative analysis of geological samples (rocks and river sediments) was performed on Xenemetrix EDXRF Benchtop Spectrometer System, model X-Calibur Objective: Perform XRF measurements on certified geological reference materials to build calibration curves for the major oxides (Na2O, MgO, SiO2, Al2O3, SiO2, P2O5, SO3, K2O, CaO, TiO2, MnO and Fe2O3) and for trace ...
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