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Gas Chromatography Analyzer Articles & Analysis
29 articles found
“Special gases” consist of high-purity, electronic and standard gases. Especially the electronic gases are a vital raw material for the electronic industrial production, such as integrated circuits, display devices or solar cells. Besides being a weak anesthetic gas, for instance in the context of dentistry, Nitrous Oxide (N2O) is also essential for the Semiconductor production ...
Calibration curves are essential for ensuring accurate and reliable results in gas chromatography (GC) analyses. By plotting known concentrations of an analyte against the detector’s response, you can establish a relationship between concentration and response. This allows for the quantification of unknown samples. This blog will guide you through the process of constructing a calibration ...
In this process, carbon dioxide is pressurized to become a supercritical fluid, which has the properties of both a liquid and a gas. This allows for more efficient extraction of bioactive compounds with minimal damage to the natural source. ...
Qualitative and Quantitative Analysis Gas chromatography is a classical method for pesticide residue analysis. The detectors used for GC determination of PCBs are generally highly selective and sensitive to electronegative compounds. At present, gas chromatography-mass spectrometry (GC-MS) is a widely used and mature technology, ...
Qualitative and Quantitative Analysis Gas chromatography is a classical method for pesticide residue analysis. The detectors used for GC determination of PCBs are generally highly selective and sensitive to electronegative compounds. At present, gas chromatography-mass spectrometry (GC-MS) is a widely used and mature technology, ...
Some HAAs are regulated by the author- ities and have been classified as potentially carcino- genic. They have traditionally been analyzed by gas chromatography (GC), a technique that requires time-consuming sample extraction and derivatiza- tion, leading to higher costs per analysis. Ion chromatography hyphenated to mass ...
Gas detectors and analyzers are used for an extensive range of applications including workplace safety, scientific research and environmental monitoring. ...
It is the main Oxygen source for Silicon Oxide in the Chemical Vapor Deposition (CVD) process and is used in the high-tech thin film industries and LCD-display manufacturing. In combination with Gas Chromatography (GC) analyzers for the direct detection of N2O concentrations, the producers of high purity gases are also on need of impurity ...
Benzene is a hydrocarbon that appears as a volatile liquid, capable of evaporating rapidly at room temperature; it is colourless and easily flammable and is the progenitor of a family of organic compounds defined as aromatic, due to the characteristic odour. Benzene is a natural component of oil (1-5% by volume) and its refining derivatives. PROBLEM: BTEX analysis gives a great indication of ...
In the last decades, several technologies have been developed to measure greenhouse gas (GHG) concentrations and fluxes. We compared six devices using different measurement technologies: two gas chromatographic systems with a barrier discharge ionization detector (GC-BID) and an electron capture detector (GC-ECD), respectively, a portable GHG ...
Liquid and gas chromatography instruments wouldn't work without columns. Both liquid and gas chromatography analyze samples by separating them into their individual chemical components. ...
With the second ever International Scotch Day being held on the 8th of February, we thought we'd take a look at a little bit of science in relation to whisky - the old bottle effect (OBE). The whisky professor at scotchwhisky.com has provided some insight into the old bottle effect and the different effect it has on whisky to wine. Old Bottle Effect is, in short, the idea that beverages flavor ...
Exposure to the anthropogenic chemicals known as endocrine disrupting compounds (EDCs) may result in negative biological effects. Low levels of EDCs in the environment aggravate the problem as exposure is constant. Urban areas concentrate pollution as greater volumes are released from human activities. Water for public supply is particularly vulnerable as the sewage treatment facilities may ...
The photocatalytic performance of the synthesized CuO nanostructures was appraised in the presence of visible light and the possible intermediates formed during the photocatalytic degradation were analyzed by gas chromatography–mass spectrometry. A suitable degradation pathway has also been proposed. ...
Triclosan (TCS) and the alkyl and aryl phenols in sludge extracts were analyzed by gas chromatography-mass spectrometry (GC-MS) in electron-impact mode while polyhalogenated phenols were analyzed by GC-MS in negative ion chemical ionization mode. ...
Water samples were extracted using solid-phase extraction and analyzed using gas chromatography coupled with mass spectrometry (GC/MS). ...
About IONICON IONICON is the world’s leading manufacturer of real-time trace gas analyzers for low concentration volatile organic compounds (VOCs) monitoring, based on the unique Proton Transfer Reaction – Mass Spectrometry (PTR-MS) technology, since 1998. The main scientific application areas include atmospheric chemistry, environmental research, ...
Low molecular weight metabolites in urine were analyzed by gas chromatography and mass spectrometry after derivatization. ...
The volatile organic compounds (VOCs) in off-gas were analyzed by gas chromatography–mass spectrometry. Results showed that sludge with 30% moisture content could be obtained in 51 minutes under drying temperature 100 °C but only within 27 minutes under 150 °C. ...
An improved derivatization protocol for the simultaneous determination of alkylphenol ethoxylates and brominated flame retardants with heptafluorobutyric anhydride under triethylamine amine base was investigated. The derivatization reaction was completed in 30 min at 50 °C using hexane as solvent. Under these conditions, it was observed that alkylphenol ethoxylates and ...