Mass Spectrometry Articles
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Evolved gas analysis - a high sensitivity study of a solvent of recrystallisation in a pharmaceutical
Introduction Thermogravimetric Analysis (TGA) of materials is commonly used to provide information on the weight loss as a sample is heated or held isothermally. Pharmaceutical materials often show weight losses associated with the loss of solvent/ water, desolvation or decomposition of the sample. This information is then used to assess the purity and stability of the material and its ...
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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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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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Evolved gas analysis - the study of materials using a Thermogravimetric Analyser (TGA) coupled to a Mass Spectrometer (MS)
Thermogravimetric Analysis (TGA) of materials is commonly used to provide information on the weight loss as a sample is heated or held isothermally. Pharmaceutical materials often show weight losses associated with the loss of solvent/ water, desolvation or decomposition of the sample. This information is then used to assess the purity and stability of the material and its suitability for use. ...
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QIC-Biostream - exhaust gas analysis of small scale fermenters
Summary The application of the Hiden QIC-Biostream gas analysis system is to monitor the off-gas and vapours from up to 80 small scale fermenters for yield optimisation and process screening. Introduction Biotechnology is an extremely important area for the 21st century and information relating to yield of a product is crucial to most Biotech Companies. From a research perspective, it is very ...
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The next generation in high sensitivity and high resolution Proton-Transfer-Reaction Mass Spectrometry (PTR-TOFMS)
Ultimate Performance in mass resolution, sensitivity and detection limits The IONICON PTR-TOF 8000 and PTR-TOF 2000 are both leading their respective fields in the market of time of flight based PTR-MS instruments. The PTR-TOF 8000 features the highest mass resolving power and the PTR-TOF 2000 the lowest detection limit of all commercially available PTR-TOF-MS systems. Below you will find a ...
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Using Nitrogen Purge Gas for US EPA Drinking Water Methods
Abstract The USEPA developed Method 524.4, “Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry (Using Nitrogen Purge Gas)”, for identifying and measuring purgeable volatile organic compounds in surface water, groundwater, and drinking water. Due to the economic concerns associated with the cost of helium, this method allows for ...
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Analytical Trap Comparison for USEPA Method 8260C
Abstract Purge and trap concentration is a technique that is used for the analysis of Volatile Organic Compounds (VOCs). The major component of any purge and trap system is the analytical trap. This trap is responsible for retaining the VOCs during the purge cycle and then releasing them upon heating and transfer to the GC/MS for separation and detection. While most standard methods define the ...
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Assessing natural contents of hazardous metals in soils by different analytical methods and its impact on environmental legislative measures
A variety of analytical techniques are commonly used to assess natural metal concentrations in soils. Although the choice of the analytical procedure may appear to be an unimportant issue, through an example from the Po Plain we document that for specific hazardous metals the arbitrary choice between separate analytical techniques may have contrasting legislative implications. Comparative ...
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SETAC workshop on the synthesis, characterisation, ecotoxicity, hazard and risk assessment of engineered nanoparticles
At the beginning of January, I attended a three-day SETAC “summer-school” entitled ‘The synthesis, characterisation, ecotoxicity, and hazard and risk assessment of engineered nanoparticles’. The workshop was run in the School of Biomedical and Biological Sciences at Plymouth University. Attendees, from across Europe and even North and South America, represented a range of ...
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Extraction of Sediment using the SpeedExtractor E-916 for the determination of Polychlorinated Biphenyls (PCBs)
PCBs were used as coolants and dielectric fluid in transformers, as flame retardants, hydraulic fluids and additives in plastics and for many other applications until the 1980s. They are toxic, persistent and bioaccumulate in terrestial and aquatic biosystems and due to atmospheric effects they are ubiquitous in the environment. Sediment samples from a round robin program (SETOC 2008/4, Wepal, ...
By BUCHI
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The removal and degradation of pharmaceutical compounds during membrane bioreactor treatment
Pharmaceutical compounds such as non-steroidal anti-inflammatory drugs (NSAIDs) and antibiotics have been detected in sewage treatment plant (STP) effluents, surface and ground water and even in drinking water all over the world, and therefore have developed as compounds of concern. Membrane bioreactor (MBR) treatment has gained significant popularity as an advanced wastewater treatment ...
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Analysis of Multi-Pesticide Residues in Vegetables, Food, and Fruits by SPE/GC-MS
Cleanup of matrices is the first, the most important, and the most critical step for both broad-spectrum screening and accurate determination of pesticides and their metabolites in vegetables,meats, drinks and fruits. In most cases, solid phase extraction (SPE) methods are used to clean up the extracts before the GC-MS analysis. The ideal SPE material(s) should remove the greatest number of food ...
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US EPA Method 8270 Semivolatiles on the Equity-5
US EPA Method 8270 describes the analysis of a wide variety of semivolatile compounds by GC/MS. In this application, the Equity-5 was used to analyze 74 compounds commonly targeted for analysis by environmental laboratories. The analysis also included 6 internal standards and 8 surrogates. The Equity column showed excellent peak shape and response for both basic and acidic compounds, including ...
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Extraction of Sediment using the SpeedExtractor E-916 for the Determination of Polycyclic Aromatic Hydrocarbons (PAH)
Polycyclic aromatic hydrocarbons (PAH) are chemical compounds that consist of fused aromatic rings and do not contain heteroatoms or carry substituents. They are of concern because some compounds have been identified as carcinogenic, mutagenic and teratogenic. Sediment samples origin from a round robin program (SETOC 2008/4, Wepal, Wageningen University) were extracted according to EPA 3545A with ...
By BUCHI
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Materials Testing Laboratory Provides Cutting Edge Contamination Testing Solutions
Many industries have extremely tight parameters for any contamination of parts that are used in their manufacturing process. Testing for contamination and quality control is an integral part of these companies’ final products. At EMSL Analytical, the Materials Testing Laboratory has extensive experience in providing highly detailed analytical services to assist manufacturers in reaching ...
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Heavy Metals Water Testing Powered by DNA
Water pollution is a worldwide problem affecting developing and developed countries alike. Heavy metal contaminants are one prevalent type of water pollutant. They are persistent in the environment once d is charged and removal from source waters is necessary to ensure a clean drinking water supply. The problem of heavy metal pollution arises from several sources. Heavy metals such as uranium can ...
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Determination of brominated flame retardants in Jukskei River catchment area in Gauteng, South Africa
Brominated flame retardants (BFRs) are considered to be environmental pollutants due to their toxicity, persistence and ubiquity in the environment. Little information is known about the presence of brominated flame retardants in South Africa's water systems. Therefore, this study examined and compared different extraction methods (liquid–liquid (LL) vs. solid phase (SP) for water, Soxhlet ...
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Statistical downscaling of temperatures under climate change scenarios for Thames river basin, Canada
Many impact studies require climate change information at a finer resolution than that provided by Global Circulation Models (GCMs). This paper investigates the impact of climate change on maximum and minimum temperatures (i.e., predictands) of 14 meteorological stations in the Upper Thames River Basin (UTRB), Ontario, Canada. The data used for evaluation were large-scale predictor variables, ...
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Quantitative analysis of methanol in wastewater by GC-MS with direct injection or headspace SPME sample introduction. Analytical Methods
Abstract: Monitoring methanol (MeOH) concentration in wastewater treatment processes is important because methanol is a widely used carbon source for denitrification. Headspace solid-phase microextraction (HS-SPME) and direct liquid injection coupled with gas chromatography and mass spectrometry (GC/MS) were studied to analyze methanol in municipal wastewater samples in the mg mL-1 range. The ...
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