Archives: Peer-Reviewed Studies

Cost-effective FTIR and 1H NMR spectrometry used to screen valuable molecules extracted from selected West African trees by a sustainable biochar process

Authors: Ayobami Salami, Teemu Vilppo, Sari Pitkänen, Janne Weisell, Kaisa Raninen, Jouko Vepsäläinen, Reijo Lappalainen Abstract This study focused on wood extractives by a slow pyrolysis thermal extraction technique and screening of potentially valuable compounds from three African trees: Lophira lanceolata Tiegh. ex Keay., Dialium guineense Willd. and Afzelia africana Sm. The primary objective of the thermal treatment was biochar production …

Cost-effective FTIR and 1H NMR spectrometry used to screen valuable molecules extracted from selected West African trees by a sustainable biochar process Read More »

Spatial distributions and homolog profiles of chlorinated nonane paraffins, and short and medium chain chlorinated paraffins in soilsfrom Yunnan, China

Authors: Kunran Wang, Lirong Gao, Shuai Zhu, Lili Cui, Lin Qiao, Chi Xu, Di Huang, Minghui Zheng Abstract To preliminarily investigate the occurrence, spatial distributions, homolog compositions, and ecological risks of chlorinated paraffins (CPs) in Yunnan, China, 110 soil samples were collected from an area part of Yunnan, representative of the whole Yunnan area, where …

Spatial distributions and homolog profiles of chlorinated nonane paraffins, and short and medium chain chlorinated paraffins in soilsfrom Yunnan, China Read More »

Characterization of the typical fragrant compounds in traditional Chinese type soy sauce

Authors: Guozhong Zhao, Li-Li Ding, Hadiatullah Hadiatullah, Shu Li, Xiaowen Wang, Yunping Yao, Jinyu Liu, Shengping Jiang Abstract In this work, a total of 35 important aroma compounds with odor activity values (OAVs) greater than 1 were detected by gas chromatography–mass spectrometry (GC–MS) in traditional Chinese-type soy sauce. Of these, fragrant compounds with aromatic rings …

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Adding extra-dimensions to hazelnuts primary metabolome fingerprinting by comprehensive two-dimensional gas chromatography combined with time-of-flight mass spectrometry featuring tandem ionization: Insights on the aroma potential

Authors: Marta CialièRossoa MariaMazzucotellia CarloBicchia MelanieCharronb FedericaManinib RobertoMentab MauroFontanab Stephen E.Reichenbachcd ChiaraCorderoa Abstract The information potential of comprehensive two-dimensional gas chromatography combined with time of flight mass spectrometry (GC × GC-TOFMS) featuring tandem hard (70 eV) and soft (12 eV) electron ionization is here applied to accurately delineate high-quality hazelnuts (Corylus avellana L.) primary metabolome fingerprints. The information …

Adding extra-dimensions to hazelnuts primary metabolome fingerprinting by comprehensive two-dimensional gas chromatography combined with time-of-flight mass spectrometry featuring tandem ionization: Insights on the aroma potential Read More »

Steroid identification via deep learning retention time predictions and two-dimensional gas chromatography-high resolution mass spectrometry

Authors: Giuseppe Marco Randazzo, Andrea Bileck, Andrea Danani, Bruno Vogt, Michael Groessl Abstract Untargeted steroid identification represents a great analytical challenge even when using sophisticated technology such as two-dimensional gas chromatography coupled to high resolution mass spectrometry (GC × GCHRMS) due to the chemical similarity of the analytes. Moreover, when analytical standards, mass spectral and retention index …

Steroid identification via deep learning retention time predictions and two-dimensional gas chromatography-high resolution mass spectrometry Read More »

Size-resolved physico-chemical characterization of diesel exhaust particles and efficiency of exhaust aftertreatment

Authors: Soheil Zeraati-Rezaei, Mohammed S.Alam, Hongming Xu, David C.Beddows, Roy M. Harrison Abstract Knowledge of physico-chemical characteristics of particle emissions from combustion engines is essential for various modelling purposes and environmental analysis. It is of particular interest to obtain emission factors of intermediate-volatility organic compounds (IVOC) and semi-volatile organic compounds (SVOC) which have not been …

Size-resolved physico-chemical characterization of diesel exhaust particles and efficiency of exhaust aftertreatment Read More »

Coupled multidimensional GC and odor activity value calculation to identify off-odors in thermally processed muskmelon juice

Authors: Xueli Pang, Yizhi Zhang, Jun Qiu, Jianmin Cao, Yuqing Sun, Hehe Li, Fanyu Kong Abstract Predominant contributors to thermally-induced off-notes in muskmelon juice were investigated by combination of sensory evaluation, GC–olfactometry (GC–O), multidimensional GC, odor activity value (OAV) calculation and addition experiments. “Fermented” and “sulfurous” were revealed as the dominant heat-induced offensive off-notes, and …

Coupled multidimensional GC and odor activity value calculation to identify off-odors in thermally processed muskmelon juice Read More »

Establishing a link between composition and toxicity of offshore produced waters using comprehensive analysis techniques – A way forward for discharge monitoring?

Authors: Lisbet Sørensen, Paul McCormack, Dag Altin, William J. Robson, Andy M. Booth, Liv-Guri Faksness, Steven J. Rowland, Trond R. Størseth Abstract Extracts of produced waters from five mature Norwegian Sea oil fields were examined as total organic extracts (TOEs) and after fractionation into operationally-defined ‘polar’ and ‘apolar’ fractions. The TOEs and fractions were examined …

Establishing a link between composition and toxicity of offshore produced waters using comprehensive analysis techniques – A way forward for discharge monitoring? Read More »

Fungal transformation and reduction of phytotoxicity of grape pomace waste

Authors: María I.Troncozo, Marija Lješević, Vladimir P. Beškoski, Boban Anđelković, Pedro A. Balatti, Mario C.N. Saparrat Abstract Grape pomace (GP) from Vitis labrusca, the main byproduct from “American table wine” production, is recalcitrant to degradation, and its accumulation is a serious problem with negative environmental impacts. In this work, transformation of grape pomace using a steam …

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Methods for one– and two–dimensional gas chromatography with flame ionization detection for identification of Mycobacterium tuberculosis in sputum

Authors: Fatma Nur Arslan, Arend Kolk, Hans–GerdJanssen Abstract Two simplified methods based on manual thermally–assisted hydrolysis and methylation (THM) GC and GC × GC with flame ionization detection (FID) were developed for the detection of mycobacteria and Mycobacterium tuberculosis (MTB) in sputum. A central composite design was employed to optimize the THM derivatization conditions. For the detection of MTB …

Methods for one– and two–dimensional gas chromatography with flame ionization detection for identification of Mycobacterium tuberculosis in sputum Read More »