mass spectrometry Articles
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Mass Spectrometry in Real Time
Mass spectrometry as a technique has grown significantly in recent decades, with many analytical requirements are addressed by mass spectrometry in some form or other. The techniques of ionisation, mass separation and detection are varied, and the process is now used in analytical sectors ranging from relatively simple vacuum and vacuum process monitoring to the more complex life sciences and ...
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Isotope correlations for determining the isotopic composition of plutonium produced in research and power reactors using the experimental data obtained by alpha and mass spectrometry
Correlations have been developed for obtaining the isotopic composition of Pu produced in Indian research (CIRUS, DHRUVA) and power (PHWR) reactors. The experimental data obtained on 238Pu/(239Pu + 240Pu) alpha activity ratio using alpha spectrometry and on 240Pu/239Pu, 241Pu/239Pu, 242Pu/239Pu atom ratios by thermal ionisation mass spectrometry were used for developing isotope ...
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Mass spectrometric studies on irradiated (U, Pu) mixed carbide fuel of FBTR
Mass spectrometry was employed to characterise the irradiated mixed carbide fuel of fast breeder test reactor (FBTR) for assessing its performance: thermal ionisation mass spectrometry to determine the isotopic composition, concentrations of U, Pu and Nd in the dissolver solutions and to deduce the burn-up, and a quadrupole mass spectrometric system to obtain the percentage release of fission ...
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Using Mass Spectrometry to Research Thermal Hydrolysis of Waste
Mass spectrometry is used to research the thermal hydrolysis of waste materials to gain a deeper understanding of how changing parameters affect the outcomes of the process. Mass spectrometry, especially an instrument manufactured to analyse dissolved species, is ideal for waste materials as contaminants can be identified and measured. This blog post will look at the importance of thermal ...
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Novel mixed-mode stationary phases for chromatographic separation of complex mixtures of decomposed lignin
Abstract Electrochemical degradation of lignin results in a large number of unknown products, formed by both oxidative and reductive decomposition pathways, which have previously been studied by direct mass spectrometry experiments without prior liquid chromatography separation, revealing the presence of many isobaric molecules. In this study, novel phosphonium-based ionic liquid stationary ...
By SusChem
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Isolation and characterization of carnocyclin a, a novel circular bacteriocin produced by carnobacterium maltaromaticum UAL307
Carnobacterium maltaromaticum UAL307, isolated from fresh pork, exhibits potent activity against a number of gram-positive organisms, including numerous Listeria species. Three bacteriocins were isolated from culture supernatant, and using matrix-assisted laser desorption ionization-time of flight mass spectrometry and Edman sequencing, two of these bacteriocins were identified as piscicolin 126 ...
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What is On-line Electrochemical Mass Spectrometry?
On-line Electrochemical Mass Spectrometry (OEMS) is an advanced analytical technique that combines electrochemical methods with mass spectrometry. It enables real-time monitoring and analysis of evolved gases during electrochemical processes and is an extension of Differential Electrochemical Mass Spectrometry (DEMS). OEMS plays an important role in various scientific fields, offering valuable ...
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SIMS depth profile analysis of WC-Co composite used in wood materials machining after nitrogen ion implantation
Abstract: SIMS depth profile analysis of WC-Co composites used in wood materials machining after nitrogen ion implantation. The paper presents the analysis of depth profiles WC-Co samples obtained using the SIMS method. The surface of samples was modified in the process of nitrogen ions implantation. Secondary ion mass spectrometry (SIMS) is a very useful technique for the analysis of layered ...
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Metals and organic pollutants in snow surrounding an iron factory
Abstract To estimate air pollution snow samples were collected in March 2001 at six sites in the vicinity of the Kostomuksha factory in Karelia. Seventy-two chemical elements and more than 200 individual organic compounds were identified by inductively coupled plasma mass spectrometry (ICP-MS) and gas chromatography mass spectrometry (GC-MS). It was found that the levels of Li, B, Al, Fe, Ni, Cu, ...
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Proton-Transfer-Reaction Time-of-Flight Mass Spectrometry (PTR-TOFMS): Latest Improvements in Selectivity and Sensitivity
Proton-Transfer-Reaction Mass Spectrometry (PTR-MS) is one of the most sensitive methods for real-time gas analysis. One limitation, however, is the lack of unambiguous compound identification, since only the m/z of an ion is acquired. We recently tested several approaches of increasing the selectivity via varying the reduced electric field strength (E/N) and switching the reagent ions between ...
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Organotin compounds in sediments of three coastal environments from the Patagonian shore, Argentina
One of the most toxic compounds that have been introduced into the marine environment is Tributyltin (TBT) used as a biocide in antifouling paints. The aim of this study was to obtain the first information of TBT pollution in sediments of three environments of the Argentinean coastline. Sediments from the Bahia Blanca estuary, San Antonio Bay and Ushuaia Bay were sampled to determine TBT and ...
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Real-Time Multi-Species Gas Analysis & Reaction Monitoring
Real-time gas analysis and reaction monitoring using mass spectrometry have opened up new possibilities in various industries, including biotech, petrochemical, environmental monitoring, and chemical synthesis. With the Hiden QGA system, researchers and professionals can benefit from the latest advancements in mass spectrometry for real-time multi-species quantitative gas ...
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The effect of photosensitizer on diclofenac photodegradation under simulated sunlight
This paper studies the effect of photosensitizer (acetone, H2O2, surfactant and pigment) on photodegradation of diclofenac (DCF) under simulated sunlight. The results demonstrate that degradation pathways proceed via pseudo first-order kinetics in all cases. The photodegradation rate was found to increase with increasing acetone and H2O2. Surfactant and pigment inhibited the photodegradation of ...
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Do You See What We See? Mass Spectrometry Imaging is Revealing Insights in Biomedical Research
The spatial distribution of molecular species in a sample can provide a wealth of information about biological, chemical and physiological processes. Mass spectrometry (MS) imaging is a rapidly developing research technique that enables specific measurement of molecular targets at complex surfaces. This direct-from-sample analytical technique provides researchers with the information needed to ...
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Classification of proteomic data with multiclass Logistic Partial Least Squares algorithm
Early detection of cancer is crucial for successful treatments. In this paper, we propose a multiclass Logistic Partial Least Squares (LPLS) algorithm for classification of normal vs. cancer using Mass Spectrometry (MS). LPLS combines the multiclass logistic regression with Partial Least Squares (PLS) algorithm. Wavelet decomposition is also proposed for pre-processing of original data. Wavelet ...
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Evaluating the insecticidal genes and their expressed products in bacillus thuringiensis strains by combining pcr with mass spectrometry
By a combination of PCR and mass spectrometry, a total of five cry genes (cry1Aa, cry1Ac, cry2Aa, cry2Ab, and cry1Ia) were detected in genomic DNA from the wild-type Bacillus thuringiensis strain 4.0718, and three protoxins (Cry1Aa, Cry1Ac, and Cry2Aa) were identified in the strain's parasporal crystals. These results indicated that this complementary method may be useful in evaluating B. ...
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Using Differential Electrochemical Mass Spectrometry (DEMS) for CO2 Conversion
Differential Electrochemical Mass Spectrometry (DEMS) is an analytical method that is a combination of mass spectrometry and electrochemical half-cell experimentation. It is used in continuous faradaic reactions to identify products or intermediates and for characterizing the sub-monolayer levels of adsorbates on electrode surfaces through adsorption. 1. DEMS allows for in-situ mass resolved ...
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What you ever wanted to know about PTR-MS: new on-demand webinar
Watch: Introduction to PTR-MS – VOC Analyzers – Applications – Demo A good 15 minutes of your valuable time make this a worthwhile and entertaining experience, moderated by our applied science team. Philipp and Simone will introduce you to PTR-MS, present the advantages of time-of-flight mass spectrometry, show our products and some applications. They will also take you to our ...
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Arsenic and antimony speciation analysis in the environment using hyphenated techniques to inductively coupled plasma mass spectrometry: a review
Elemental speciation involves the separation and quantification of different oxidation states or chemical forms of a particular trace element. Trace metals exhibit widely different toxicities depending on their elemental species in the environment. On the other hand, inductively coupled plasma mass spectrometry (ICP-MS) is considered to be the method of choice for elemental analysis for several ...
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The History of Gas Analysis in Electrochemistry
Electrochemistry is concerned with the range of oxidation-reduction (redox) reactions that cause electrons to transfer between the molecules of reactants. It is the study of the relationship between electricity and an identifiable chemical change, which was first observed in 1780. The chemical aspect of this relationship was largely ignored until Michael Faraday established the fundamental laws ...
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