[PDF] Top 20 Gas Chromatography / Chemical Ionization Mass Spectrometry of Polyethylene Glycol Monoalkyl Ethers
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Gas Chromatography / Chemical Ionization Mass Spectrometry of Polyethylene Glycol Monoalkyl Ethers
... The mass spectrum is scanned from high mass to low mass, so the concentration of the sample increases significantly between the time when m/z 363 is detected and the time when m/z 45 is ...low ... See full document
6
Low-pressure gas chromatography with chemical ionization mass spectrometry for quantification of multifunctional organic compounds in the atmosphere
... of gas-phase hydrocarbons in the ...situ gas chromatogra- phy (GC) technique that, when combined with the sensitive and specific detection of chemical ionization mass spectrom- etry ... See full document
18
Investigation of glucocorticoid and local immunological function in tuberculosis and inflammation
... endogenous levels of cortisone and cortisol in human nasal and bronchoalveolar lavage fluids and plasma via gas chromatography-negative ion chemical ionization mass spectrometry. 11 be[r] ... See full document
Determination of volatile alkylpyrazines in microbial samples using gas chromatography-mass spectrometry coupled with head space-solid phase microextraction
... soft ionization technique was com- pared with EI ...typical mass spectrum of IPMP in EI and CI ...CI mass spectrum was clearly confirmed by detection of additional methane reagent gas adducts ... See full document
8
Structural Identification of C 2H5O and C 3H7O ions obtained from Polyethylene Glycols and Polyethylene Glycol Dialkyl Ethers and other Sources using Chemical ionization and Fourier Transformation ion Cyclotron Mass Spectrometry
... of mass 59 with higher oligomers are more complex than obtained with ...The mass spectra obtained in the reaction of these ions with triethylene glycol dimethyl ether, TEGDME, are shown in Figures 3a ... See full document
7
Artemisia vulgaris L Chemotypes
... the chemical composition obtained by Gas Chromatography Mass Spectrometry analysis of the volatiles from fresh leaves, of Artemisia vulgaris ... See full document
5
Multi-platform characterization of the human cerebrospinal fluid metabolome: a comprehensive and quantitative update
... Trace metals are known to play an important role in enzyme function and a wide number of neurodegenera- tive diseases like Alzheimer’s disease, Parkinson’s disease and other related diseases [17]. A new trend in ... See full document
11
Rival male chemical cues evoke changes in male pre- and post-copulatory investment in a flour beetle
... Using chemical analysis, we verified that this treatment engendered changes to perfumed female CHC profiles, but did not make perfumed females “smell” ...female chemical profile elicited by contact with ... See full document
9
Structural Elucidation And Analysis Of Toxic Pyrrolizidine Alkaloids From Staple Foods Of North West Tigray, Northern Ethiopia
... or acetylintermedine. Of course its molecular ions and some of its mass fragmentation relate but there is doubt still in the base peak. Three of the five compounds are toxic PAs and the other two are nontoxic. ... See full document
11
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... Ethnobotanical investigations on the locally produced oil seed plants in Burkina Faso revealed that oil from Lannea microcarpa seeds are frequently used for food, cosmetics and traditional medicine by the local people ... See full document
8
Performance of a corona ion source for measurement of sulfuric acid by chemical ionization mass spectrometry
... a chemical ionization mass spectrometer from THS Instruments (THS Instruments LLC, USA) for the detection of sulfuric ...sample gas (see Eisele and Tanner, 1993; Berresheim et ... See full document
7
Metabolomics Investigation of Glyceollins by On-Line Liquid Chromatography-Electrospray Ionization Tandem Mass Spectrometry and Fungal Metabolite Identification by Thermal Desorption Analysis Coupled with Gas Chromatography-Mass Spectrometry
... ion mass spectrum (Figure 2-4) shows a peak at m/z 337 corresponding to deprotonated glyceollins production after loss of glucuronic ...176 mass units relative to the product ions in the CID spectrum of m/z ... See full document
106
Mass spectrometry-based microbiological testing for blood stream infection
... with gas–liquid chromatography (Py-GLC); the values of Py-GLC for the classification and ID of bacteria and other microorganisms were demon- strated [21, ...pole mass spectrometer combination was ... See full document
11
STUDY OF CHEMICAL COMPOSITION AND MEDICINAL PROPERTIES OF VOLATILE OIL FROM CLOVE BUDS (EUGENIA CARYOPHYLLUS)
... There are three types of clove oil; bud oil, leaf oil and stem oil. Bud oil is derived from the flower- buds of Eugenia caryophyllus. It contains mainly of 60-90% eugenol, eugenyl acetate, caryophyllene and other minor ... See full document
5
Analysis of Temperature Rise in a Car Parked ...
... using Gas chromatography-Mass spectrometry (GC-MS).Gas chromatography-mass spectrometry (GC-MS) is an analytical method which is a combination of the features of ... See full document
16
Chemical ionization and collision induced dissociation mass spectrometry
... The spectrum recorded using carbon tetrafluoride as a collision gas, does not have particularly abundant low mass fragment ions.. A possible explanation for this deviation follows the ar[r] ... See full document
123
Synthesis and Mass Spectrum Characterization of Lyrame Schiff Base for Synthetic Ingredients in Perfumes Industry
... The chemical structure was analyzed by gas chromatography-mass spectrometry ...The mass fragmentation pattern exhibiting the lyrame has been synthesized ... See full document
5
Perchloroethylene Analysis by Chemical Oxidation and Determination of Intermediate Products by Gas Chromatography, Mass Spectrometry
... sciences, gas chromatographic was used to measure PCE and gas chromatography - mass spectrometry for intermediate ...products. Chemical oxidation involves ultrasonic waves, ... See full document
6
Mass spectrometry and gas chromatography in chemical analysis and identification : experimental factors and case studies
... Figure 4 Average linear carrier gas velocities required for different column lengths, diameters and carrier gases to provide flow rates under directly coupled GC-MS corresponding to aver[r] ... See full document
268
Antimicrobial effect of essential oil isolated from Eucalyptus globulus Labill from Montenegro
... carrier gas at a flow rate of ...their mass spectral data with those in the WILEY229 and the NIST107 mass spectra libraries, as well as by comparison of the fragmentation patterns of the mass ... See full document
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