Archives: Peer-Reviewed Studies

Short- and medium-chain chlorinated paraffins in commercial rubber track products and raw materials

Authors: Chi Xu, Lirong Gao, Minghui Zheng, Lin Qiao, Lili Cui, Kunran Wang, Di Huang Abstract Short- and medium-chain chlorinated paraffins (SCCPs and MCCPs) in commercial rubber track products and raw materials (rubber granules and adhesives) were investigated by two-dimensional gas chromatography with electron-capture negative-ionization mass spectrometry (GC × GC-ECNI-MS). The mean SCCP and MCCP concentrations in …

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Lignin catalytic hydroconversion in a semi-continuous reactor: An T experimental study

Authors: Junjie Pu, Thanh-Son Nguyen, Emmanuel Leclerc, Chantal Lorentz, Dorothée Laurenti, Isabelle Pitault, Mélaz Tayakout-Fayolle, Christophe Geantet Abstract The valorization of lignin coming from pulp industry or bio-ethanol refineries into renewable chemicals is one of the great challenges of the biorefinery concept. Among the several processes proposed to depolymerize lignin, catalytic hydroconversion appeared efficient to …

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Optimization and validation of a derivatization method with boron trifluoride in ethanol for analysis of aromatic carboxylic acids in water

Authors: Mette Kristensen, Peter Christensen, Jan H. Christensen Abstract Gas-chromatography (GC) analysis of carboxylic acids is limited by the high polarity and low volatility of most of these compounds. Boron trifluoride (BF3) mediated alkylation reactions is one of the most commonly used derivatization methods for making carboxylic acids GC compatible. A semi-automated BF3·EtOH (ethanol) derivatization …

Optimization and validation of a derivatization method with boron trifluoride in ethanol for analysis of aromatic carboxylic acids in water Read More »

Accumulation and toxicity of monoaromatic petroleum hydrocarbons in early life stages of cod and haddock

Authors: Lisbet Sørensen, Bjørn Henrik Hansen, Julia Farkas, Carey E. Donald, William J. Robson, Andrew Tonkin, Sonnich Meier, Steven J. Rowland Abstract A multitude of recent studies have documented the detrimental effects of crude oil exposure on early life stages of fish, including larvae and embryos. While polycyclic aromatic hydrocarbons (PAHs), particularly alkyl PAHs, are …

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Analysis of chemosensory markers in cigarette smoke from different tobacco varieties by GCxGC-TOFMS and chemometrics

Authors: Thiago G.Schwanz, Liane V. V. Bokowski, Marcelo C.A.Marcelo, Angela C.Jandrey, Jailson C., Dias Daniel, H. Maximiano, Luciana S. Canova, Oscar F.S. Pontes, Guilherme P. Sabin, Samuel Kaiser Abstract Commercial cigarettes are made from a blend of different tobacco varieties, which in turn are the results of different agronomic practices and post-harvest curing processes. The …

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Essential oil composition of five Nepeta species cultivated in Lithuania and evaluation of their bioactivities, toxicity and antioxidant potential of hydrodistillation residue

Authors: Renata Baranauskienė, Vilma Bendžiuvienė, Ona Ragažinskienė, Petras Rimantas Venskutonis Abstract Essential oils of Nepeta cataria var. citriodora, N. transcaucasica, N. melissifolia, N. sibirica and N. nuda were investigated. The yields of EO were from 0.78 (N. nuda) to 5.94 (N. cataria) mg/g plant dry weight (pdw). In total, 143 compounds were identified and quantified in Nepeta plant EOs by GC-MS/FID. 4aα,7α,7aβ-Nepetalactone (NL) was dominant constituent …

Essential oil composition of five Nepeta species cultivated in Lithuania and evaluation of their bioactivities, toxicity and antioxidant potential of hydrodistillation residue Read More »

Investigation of the pyrolysis characteristics of guaiacol lignin using T combined Py-GC × GC/TOF-MS and in-situ FTIR

Authors: Lei Wang, Jian Li, Yingquan Chen, Haiping Yang, Jingai Shao, Xiaoyu Zhang, Hongbo Yu, Hanping Chen Abstract To investigate the pyrolysis behavior of guaiacol lignin (G-lignin) at 400–750 °C and its major decomposition mechanisms, ginkgo MWL as a typical G-lignin was decomposed in a micro-pyrolyzer, coupling two-dimensional gas chromatography with time-of-flight mass spectrometric detection (Py-GC × GC/TOF-MS) …

Investigation of the pyrolysis characteristics of guaiacol lignin using T combined Py-GC × GC/TOF-MS and in-situ FTIR Read More »

Comprehensive two-dimensional gas-chromatography-based property estimation to assess the fate and behavior of complex mixtures: A case study of vehicle engine oil

Authors: Yasuyuki Zushi, Yuki Yamatori, Jun Nagata, Deedar Nabi Abstract A method was developed to estimate the properties and assess the potential environmental risk of analytes in a complex mixture by comprehensive two-dimensional gas chromatography (GC × GC). A GC × GC-based estimation model was calibrated for 12 physicochemical properties that were relevant to the environment or to biological organisms, including human beings. …

Comprehensive two-dimensional gas-chromatography-based property estimation to assess the fate and behavior of complex mixtures: A case study of vehicle engine oil Read More »

Bioaccessibility of short chain chlorinated paraffins in meat and seafood

Lili Cui, Lirong Gao, Minghui Zheng, Jingguang Li, Lei Zhang, Yongning Wu, Lin Qiao, Chi Xu, Kunran Wang, Di Huang Abstract Bioaccessibility of short chain chlorinated paraffins (SCCPs), which is important for estimation of dietary exposure, has not been evaluated in previous studies. In the present study, we determined the bioaccessibility of SCCPs in meat …

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Identification and evaluation of chlorinated nonane paraffins in the environment: A persistent organic pollutant candidate for the Stockholm Convention?

Authors: Dan Xia, Lirong Gao, Minghui Zheng, Yifei Sun, Lin Qiao,Huiting Huang, Haijun Zhang, Jianjie Fu, Yongning Wu, Jingguang Li, Lei Zhang Abstract Short-chain chlorinated paraffins (SCCPs), with 10–13 carbon atoms, are persistent organic pollutants under the Stockholm Convention because they are persistent, toxic, and bioaccumulative. However, little information is available on CPs with <10 carbon atoms. C9-CPs were …

Identification and evaluation of chlorinated nonane paraffins in the environment: A persistent organic pollutant candidate for the Stockholm Convention? Read More »