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Gas Chromatography coupled with Mass Spectrometry
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The concentration levels of PAHs in the samples were determined using gas chromatography coupled with mass spectrometry. The main applied research methods include field observation and sample analysis.
11p
viironman
02-06-2023
5
3
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The chemical composition, antioxidant properties and antibacterial activities of different extracts (water, ethanol, acetate ethyl and hexane) and essential oil from Platycladus orientalis leaves were analysed in this study. The essential oil was extracted by hydrodistillation, and its chemical composition was determined by gas chromatography coupled to mass spectrometry (GC-MS).
11p
lyhuyenthu
31-01-2023
8
2
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The performance of an original CE-MS interface that allows the in-axis positioning of the electrospray with respect to the MS inlet was evaluated. The variations in the geometrical alignment of this configuration in the absence of a nebulizing gas afforded a significant reduction in the sheath-liquid flow rate from 3 μL/min to as low as 300 nL/min.
8p
viginny
23-12-2022
12
3
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Nontargeted analysis based on mass spectrometry is a rising practice in environmental monitoring for identifying contaminants of emerging concern. Nontargeted analysis performed using comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC×GC/TOF-MS) generates large numbers of possible analytes.
8p
viginny
23-12-2022
6
2
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A determination method of ethylene oxide (ETO) and 2-chloro-ethanol (2-CE) in foods, especially those with high-fat content, by gas chromatography-tandem mass spectrometry (GC-MS/MS) was developed.
14p
viporsche
03-11-2022
16
4
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This research aims to study a process of steeping in the n-heptane, used for reducing the migration of additives contained initially in toys for babies plasticized with di-octylphtalate (DOP) based on poly (vinyl chloride) (PVC) and stabilized with epoxidized sunflower oil (ESO). Two formulations were carried out at different levels of DOP plasticizers (15% and 45%). The migration tests were conducted in the synthetic saliva in the absence and in the presence of α-amylase with or without agitation at 37° C for 1, 3, and 6 h.
9p
langthannam
29-12-2021
10
0
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The aim of this work is to valorise the species Ammodaucus leucotrichus Coss which is known by its abundance in perillaldehyde. The plant material was collected from two regions in Morocco: Errachidia and Smara region, then was hydrodistilled. The essential oils (EOs) obtained were firstly characterized by gas chromatography coupled to mass spectrometry (GC-MS). Secondly the EO with the major component is the perillaldehyde was used as starting material to semi-synthesize three p-menthane monoterpenoids.
6p
mudbound
10-12-2021
7
1
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The development of products that fully meet the criteria for a healthy diet is one of the main trends in nutrition quality improvement worldwide. Amaranth, a leader in protein quality, has significant potential. A comparative study of the protein complex in leaf biomass has been conducted for the first time for Amaranthus spp. grown for various uses. The aim of the study was to analyze the characteristics of the amino acid composition and identify the relationships among its components in the amaranth leaf biomass.
11p
hanthienngao
30-11-2021
17
1
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Ionic liquid (IL) containing amino and vinyl terminated imidazolium cation and bis[(trifluoromethyl)sulfonyl] imide anion-functionalized graphene oxide (GO) coating material was prepared and coated on a stainless steel wire by a sol-gel technique for headspace-solid phase microextraction (HS-SPME). Its extraction performance was checked by HSSPME of polycyclic aromatic hydrocarbons (PAHs) coupled to gas chromatography with mass spectrometry (GC-MS).
15p
tudichquannguyet
29-11-2021
10
2
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Gas chromatography coupled with mass spectrometry (GC-MS) is one of the technologies widely used for qualitative and quantitative analysis of small molecules. In particular, GC coupled to single quadrupole MS can be utilized for targeted analysis by selected ion monitoring (SIM).
12p
vikentucky2711
24-11-2020
13
1
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The dynamics of plant volatile (PV) emission, and the relationship between damaged area and biosynthesis of bioactive molecules in plant-insect interactions, remain open questions.
13p
vihashirama2711
21-05-2020
21
1
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The aim of this study is to develop a quick ultrasonic extraction procedure for determination of 16 typical polycyclic aromatic hydrocarbons (PAHs) in air particles. The determination and quantification of PAHs in air particles samples were performed using gas chromatography coupled to mass spectrometry (GC-MS) with the aid of deuterated PAH internal standards. One µg mixture of PAHs was spiked to a quarter of quartz fiber filter and extracted with four different solvents/solvent mixtures (methanol:dichloromethane, acetone:dichloromethane; acetone:hexane; dichloromethane).
11p
abcxyz123_02
03-03-2020
17
1
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The main objective of this study was to evaluate the ability of Corynbacterium glutamicum to produce a safe nutty like flavor from enzymatic soybean meal hydrolysate (E-SH) and to investigate the effect of encapsulation and storage on the quality of the produced nutty flavoring. C. glutamicum was incubated with E-SH, supplemented and un-supplemented with a mixture of threonine and lysine. The generated volatiles of each culture were subjected to odor sensory analysis.
8p
trinhthamhodang1
14-11-2019
12
0
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Flow cytometry is a technology that simultaneously measures and analyses multiple physical characteristics of single particles, usually cells, as they flow in a fluid stream through a beam of light. The properties measured include a particle’s relative size (represented by forward angle light scatter), relative granularity or internal complexity (represented by right-angle scatter), and relative fluorescence intensity.
314p
yeutinh98
22-09-2012
71
12
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