Archives: Peer-Reviewed Studies

Chromatographic characterization of bio-oils from fast pyrolysis of sugar cane residues (straw and bagasse) from four genotypes of the Saccharum Complex

Authors: Jamilly A.S. Barros, Maurício C. Krause, Eliane Lazzari, Thiago R. Bjerk, Adriane L. do Amaral, Elina B.Caramão, Laiza C. Krause Abstract Residues of four different genotypes of sugarcane (Saccharum sp., Saccharum Robustum, Miscanthus sp. and Erianthus sp.), belonging to the Germplasm Bank of the Saccharum Complex (BAGCANA) from EMBRAPA, were subjected to a pyrolysis process and the bio-oils produced were analyzed by …

Chromatographic characterization of bio-oils from fast pyrolysis of sugar cane residues (straw and bagasse) from four genotypes of the Saccharum Complex Read More »

Spatial variations in the occurrence of potentially genotoxic disinfection by-products in drinking water distribution systems in China

Authors: Chunmei Li, Donghong Wang, Xiong Xu, Meijia Xu, Zijian Wang Abstract We investigated the occurrence of disinfection by-products (DBPs) with genotoxic potential in plant effluent and distribution water samples from four drinking water treatment plants in two Chinese cities using comprehensive two-dimensional gas chromatography–quadrupole mass spectrometry. We tested the samples for 37 DBPs with genotoxic potential, which …

Spatial variations in the occurrence of potentially genotoxic disinfection by-products in drinking water distribution systems in China Read More »

Comprehensive chemical characterization of lubricating oils used in modern vehicular engines utilizing GC x GC-TOFMS

Authors: Zhirong Liang, Longfei Chen, Mohammed S.Alam, Soheil Zeraati Rezaei, Christopher Stark, Hongming Xu, Roy M. Harrison Abstract A number of major studies have demonstrated that the SVOC (Semi-volatile organic compounds) within engine emissions derive predominantly from unburned fuel and lubricants, and are a major contributor to primary atmospheric aerosol containing thousands of organic compounds. …

Comprehensive chemical characterization of lubricating oils used in modern vehicular engines utilizing GC x GC-TOFMS Read More »

Analytical characterization of East Asian handmade papers: A combined approach using Py-GCxGC/MS and multivariate analysis

Authors: Bin Han, Jérôme Vial, Masamitsu Inaba, Michel Sablier Abstract An analytical method based on the combination of on-line pyrolysis-comprehensive two-dimensional gas chromatography/mass spectrometry and multivariate analysis for a direct characterization of traditional East Asian handmade papers is presented here. The method was applied to three kinds of widely used handmade papers in East Asia …

Analytical characterization of East Asian handmade papers: A combined approach using Py-GCxGC/MS and multivariate analysis Read More »

TUD-1 type aluminosilicate acid catalysts for 1-butene oligomerisation

Authors: Andreia F. Silva, Auguste Fernandes, Margarida M. Antunes, Patrícia Neves, Sílvia M. Rocha, Maria F. Ribeiro, Martyn Pillinger, Jorge Ribeiro, Carlos M. Silva, Anabela A. Valentea Abstract TUD-1 type mesoporous aluminosilicates were explored for the acid-catalysed oligomerisation of 1-butene, under high pressure, continuous flow operation, which is an attractive route to produce sulphur-free synthetic fuels with reduced aromatics content. The solid acid …

TUD-1 type aluminosilicate acid catalysts for 1-butene oligomerisation Read More »

Tracking changes in composition and amount of dissolved organic matter throughout drinking water treatment plants by comprehensive two-dimensional gas chromatography–quadrupole mass spectrometry

Authors: Chunmei Li, Donghong Wang, Xiong Xu, Meijia Xu, Zijian Wang, Ruiyang Xiao Abstract Dissolved organic matter (DOM) can affect the performance of water treatment processes and produce undesirable disinfection by-products during disinfection. Several studies have been undertaken on the structural characterization of DOM, but its fate during drinking water treatment processes is still not fully understood. In this …

Tracking changes in composition and amount of dissolved organic matter throughout drinking water treatment plants by comprehensive two-dimensional gas chromatography–quadrupole mass spectrometry Read More »

Improved coverage of naphthenic acid fraction compounds by comprehensive two-dimensional gas chromatography coupled with high resolution mass spectrometry

Authors: David T. Bowman, Karl J. Jobst, Xavier Ortiz, Eric J. Reiner, Lesley A. Warren, Brian E. McCarry, Greg F. Slater Abstract This study reports the first application of comprehensive two-dimensional gas chromatography coupled to a high-resolution quadrupole time-of-flight mass spectrometer (GC × GC/HRQTOF-MS) for the characterization of naphthenic acid fraction compounds (NAFCs) from the Alberta Oil …

Improved coverage of naphthenic acid fraction compounds by comprehensive two-dimensional gas chromatography coupled with high resolution mass spectrometry Read More »

Comprehensive two-dimensional gas chromatography-mass spectrometry of complex mixtures of anaerobic bacterial metabolites of petroleum hydrocarbons.

Authors: C.M. Aitken, I.M. Head, D.M. Jones, S.J. Rowland, A.G. Scarlett, C.E. West Abstract Anaerobic biotransformation of petroleum hydrocarbons is an important alteration mechanism, both subsurface in geological reservoirs, in aquifers and in anoxic deep sea environments. Here we report the resolution and identification, by comprehensive two-dimensional gas chromatography-mass spectrometry (GC×GC–MS), of complex mixtures of …

Comprehensive two-dimensional gas chromatography-mass spectrometry of complex mixtures of anaerobic bacterial metabolites of petroleum hydrocarbons. Read More »

Brachybacterium sp. CH-KOV3 isolated from an oil-pollutedenvironment–a new producer of levan

Authors: Aleksandra Djurić, Gordana Gojgić-Cvijović, Dragica Jakovljević, Branka Kekez, Jovana Stefanović Kojić, Maija-Liisa Mattinen, Inka Elina Harju, Miroslav M.Vrvić, Vladimir P.Beškoski Abstract Various microorganisms isolated from polluted environments, such as Pseudomonas sp. and Micrococcus sp. can synthesize exopolysaccharides (EPSs) which are natural, non-toxic and biodegradable polymers. EPSs play a key role in protection of microbial cells under various external influences. For …

Brachybacterium sp. CH-KOV3 isolated from an oil-pollutedenvironment–a new producer of levan Read More »

Full characterization of compounds obtained from fractional distillation and upgrading of a HTL biocrude

Authors: T.H. Pedersen, C.U. Jensen, L. Sandström, L.A. Rosendahl Abstract Biocrude from hydrothermal liquefaction of biomass provides a sustainable source from which to produce chemicals and fuels. However, just as for fossil crude, the chemical complexity of the biocrude impedes the characterization and hence identification of market potentials for both biocrude and individual fractions. Here, …

Full characterization of compounds obtained from fractional distillation and upgrading of a HTL biocrude Read More »