quadrupole mass spectrometer Articles
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Detection of Low Levels of Organic Species in Seawater
In this particular experiment, the sensitivity of a Hiden Quadrupole Mass Spectrometer (QMS) to dimethylsulphide was measured Dimethylsulphide (DMS) - chemical formula CH3SCH3- is a naturally produced trace substance, evolved from certain marine micro organisms, such as plankton. Detection of fluctuations in the DMS concentration in seawater therefore gives important information about the ...
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Growing hydrogen expectations: embedded catalyst design for active and stable catalysts
Hydrogen as an energy vector in combination with fuel cells is one of the emerging energy solution in terms of sustainability and low environmental impact. H2 sustainable production is therefore one of the key target of today. Recently, the Materials, Environment and Energy research group at the University of Trieste, coordinated by Professor Paolo Fornasiero investigated various options for H2 ...
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The Development of an Improved Radiation Resistant RGA System for the Analysis of Deuterium, Tritium and Impurities in the ITER Device
Preliminary demonstration on JET of an ITER neutron environment-compatible quadrupole mass-spectrometer ITER Radiation Hardness Assurance Policy was recently revised calling for stricter neutron exposure limits for the electronics in systems critical to plasma operations. The ITER Diagnostic Residual Gas Analyzer (DRGA) will measure the distribution of gas species, i.e., deuterium, tritium, and ...
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Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo Catalysts
The importance of investigating the acidity of heterogeneous catalysts cannot be overstated, particularly when acidity is the key factor ruling the outcome of a reaction. Wrong acidic features can easily lead to undesired products and/or, in the worst cases, to the deactivation of the catalyst. Both the number of the acid sites and their strength are therefore crucial and ammonia temperature ...
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Mass spectrometers for catalysis & thermal analysis
Hiden Analytical have been designing and developing the highest quality quadrupole mass spectrometer based gas analysis systems for over 25 years. We have built a reputation for delivering instruments with superior sensitivity, accuracy and reproducibility together with a first class global service and applications support network. From dedicated triple filter UHV TPD quadrupoles to fully ...
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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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Analysis of PFAS Specified in EPA Method 537 and Beyond using Shimadzu UFMS
This application note demonstrates the use, performance, and compatibility of Shimadzu ultra-fast mass spectrometry for EPA Method 537 with an expanded compound panel of seven additional PFAS. A total of 27 PFAS were extracted, separated and detected with triple quadrupole mass spectrometers, LCMS-8045 and LCMS-8050. Recoveries of 86-106% (LCMS-8050) and 77-104% (LCMS-8045) were well within the ...
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High Throughput LC-MS-MS Analysis of Carbendazim in Orange Juice
Highly sensitive analytical methods are necessary to prevent contaminated produce from entering the food supply. In order to help move fresh imports through customs without delay, methods must be rapid and cost effective, in order to test imports thoroughly. LC-MS offers the highly sensitive, robust measurement needed, while ultra high performance liquid chromatography enables high speed ...
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Determination of Selected ASTM Perfluorinated Compounds (PFCs) Using LC-MS/MS
ASTM methods D7968-14 and D7979-15 are used to determine the same list of PFCs but in different matrices. ASTM method D7968-14 lists soil as a matrix while ASTM method 7979-15 lists water, sludge, influent, effluent and waste water as matrix options. These methods use different extraction techniques but both evaluate the samples by liquid chromatography/tandem mass spectrometry (LC/MS/MS). We ...
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Thin Film Applications of the UHV-TPD Workstation
A successful method for investigating the microstructure of thin films by thermal effusion measurements is Temperature Programmed Desorption (TPD), also known as Thermal Desorption Spectrometry (TDS) or Thermal Desorption Analysis (TDA). Analysis by TPD involves positioning the sample in an Ultra High Vacuum (UHV) chamber and heating the sample at different linear temperature ramp rates while ...
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Analysis of Haloacetic Acids in Tap Water Using LC/MS/MS
Haloacetic acids are produced as by-products of chlorination in the water treatment purification process. Three haloacetic acids, monochloroacetic acid (MCAA), dichloroacetic acid (DCAA), and trichloroacetic acid (TCAA), are subject to water quality standard for drinking water with established limits (MCAA: 0.02 mg/L, DCAA: 0.04 mg/L, TCAA: 0.2 mg/L) by Japan Ministry of Health, Labour and ...
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EPA Method 8270D Analysis Using Narrow-bore GC Columns and Fast Data Acquisition with a Quadrupole GCMS System - Case Study
Analytical support of environmental programs has been conducted for several decades using standard-bore capillary columns (0.25mmid) and quadrupole GCMS systems. Depending on method conditions and program requirements, the QC measures can consume a significant portion of a 12-hour shift, leaving less time for analysis of real-world samples. Typical cycle times (time from beginning of a run to the ...
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Pumping Ions – An Exercise in Engineering Sensitivity Into the Xevo TQ-XS Mass Spectrometer
The challenge: Create the most sensitive mass spectrometer for quantitative analysis. That’s a tall order for any design engineering team. When given that assignment for a next-generation, tandem quadrupole mass spectrometer, our design engineers first spoke to those for whom analytical sensitivity means the most: scientists doing quantitative studies for demanding clients relying on ...
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Heterogeneous electro-Fenton oxidation of azo dye methyl orange catalyzed by magnetic Fe3O4 nanoparticles
Azo dye methyl orange (MO) degradation by heterogeneous electro-Fenton (EF) with a magnetic nano-Fe3O4 catalyst was investigated. In this study, Fe3O4 was synthesized by a coprecipitation method and characterized by X-ray diffraction and scanning electron microscopy. The influences of the main operating parameters such as current density, pH, catalyst dosage and aeration rate were studied. ...
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US EPA Method 8260 with the Atomx XYZ and the Thermo Scientific TRACE 1310 GC and ISQ MS
Abstract US EPA Method 8260, in conjunction with Methods 5030 and 5035, was used to determine the concentration of volatile organic compounds (VOCs) in water and soil matrices. The Teledyne Tekmar Atomx XYZ purge and trap (P&T) system along with a Thermo Scientific TRACE 1310 Gas Chromatograph (GC) and ISQ Single Quadrupole Mass Spectrometer (MS) was used to create a working linear ...
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US EPA Method 524.2 - Atomx XYZ and Agilent 7890B GC/5977A MS
Abstract US EPA Method 8260, in conjunction with Methods 5030 and 5035, was used to determine the concentration of volatile organic compounds (VOCs) in water and soil matrices. The Teledyne Tekmar Atomx XYZ purge and trap (P&T) system along with a Thermo Scientific TRACE 1310 Gas Chromatograph (GC) and ISQ Single Quadrupole Mass Spectrometer (MS) was used to create a working linear ...
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http://saranalaboratorium.com/scion-instruments-application-note/
A method for analysis of 258 pesticides has been developed on Scion TQ triple quadrupole mass spectrometer. The method setup is streamlined with the new software approach of Compound Based Scanning (CBS). The matrix-matched calibration results have demonstrated good sensitivity, linearity and precision of Scion TQ. This application note describes a GC-MS/MS method for detection of 258 ...
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Operando Raman-Mass Spectrometry investigation of hydrogen release by thermolysis of ammonia borane confined in mesoporous materials
Ammonia borane (NH3BH3, AB hereafter) is a white crystalline inorganic solid with 19.6 wt. % mass content of hydrogen whose thermal decomposition releases up to 2 equivalents of hydrogen below 200ºC and therefore constitutes a promising hydrogen storage material. However, the application of AB is hindered by slow hydrogen release kinetics among other factors. Confinement of AB in scaffolding ...
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Determination of ionizing threshold of trimethylamine ions with a high resolution RGA mass spectrometer
In radiation detection, gaseous detectors have an important role in the characterization of incident radiation. Experiences, namely in X-ray spectrometry, X-ray astronomy, medical instrumentation and high energy physics use gaseous detectors, usually with a rare gas, as a detection medium. Recently it was suggested the addition of molecular additives to the main gas to improve some ...
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Has Your Dinner Menu Been Quantified?
For decades, food security was viewed exclusively through the lens of shortages. In the 1960s, when daily food availability in emerging countries was just 1,850 kcal per person as many as half of the world’s population was malnourished. It’s easy to understand our narrow focus on increasing food production. The challenges we face have shifted. The development and distribution of ...
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