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Dispersive liquid–liquid microextraction and gas chromatography accurate mass spectrometry for extraction and non-targeted profiling of volatile and semi-volatile compounds in grape marc distillates
(Elsevier Science, 2018-04)
The suitability of dispersive liquid–liquid microextraction (DLLME) and gas chromatography accurate mass spectrometry (GC–MS), based on a time-of-flight (TOF) MS analyzer and using electron ionization (EI), for the ...
There is no Time to waste: low-pressure gas chromatography-mass spectrometry is a proven solution for fast, sensitive, and robust GC-MS analysis
(Advanstar Communications Inc., 2020-08)
Low-pressure gas chromatography (LPGC) has been known to be advantageous compared to standard GC since Giddings first described the concept in 1962, but a practical solution for its use eluded analytical chemists until the ...
Preliminary molecular evidence of feasting in the Inca site of Fuerte Quemado-Intihuatana, Catamarca, Argentina
(Elsevier, 2017-08)
Feasting was an important aspect of the domination strategy designed by the Inca Empire in the provinces. Hospitality banquets were the setting for negotiations between Cuzco and the annexed populations. Consumption of ...
Preliminary molecular evidence of feasting in the Inca site of Fuerte Quemado-Intihuatana, Catamarca, Argentina
(Elsevier, 2017-08)
Feasting was an important aspect of the domination strategy designed by the Inca Empire in the provinces. Hospitality banquets were the setting for negotiations between Cuzco and the annexed populations. Consumption of ...
Simple approach based on ultrasound-assisted emulsification-microextraction for determination of polibrominated flame retardants in water samples by gas chromatography-mass spectrometry
(Elsevier Science, 2009-01)
A simple, efficient, innovative and environmentally friendly analytical technique was successfully applied for the first time for the extraction and preconcentration of polybrominated diphenyl ethers (PBDEs) from water ...
Coacervative microextraction ultrasound-assisted back-extraction technique for determination of organophosphates pesticides in honey samples by gas chromatography–mass spectrometry
(Elsevier Science, 2010-10)
Coacervative microextraction ultrasound-assisted back-extraction technique (CME-UABE)is proposed for the first time for extracting and preconcentrating organophosphates pesticides (OPPs) from honey samples prior to gas ...
Determination of polybrominated diphenyl ethers in water and soil samples by cloud point extraction-ultrasound-assisted back-extraction-gas chromatography-mass spectrometry
(Elsevier Science, 2009-05)
A novel and efficient analytical methodology is proposed for extracting and preconcentrating polybrominated diphenyl ethers (PBDEs) from samples of environmental interest prior gas chromatography-mass spectrometry (GC-MS) ...
Ultrasound-assisted leaching-dispersive solid-phase extraction followed by liquid-liquid microextraction for the determination of polybrominated diphenyl ethers in sediment samples by gas chromatography-tandem mass spectrometry
(Elsevier Science, 2010-06)
Ultrasound-assisted leaching-dispersive solid-phase extraction followed by dispersive liquid-liquid microextraction (USAL-DSPE-DLLME) technique has been developed as a new analytical approach for extracting, cleaning up ...
Pyrolysis–gas chromatography/mass spectrometry applied to the identification of different states of polyaniline
(Elsevier Science, 2007-10)
Pyrolysis-gas chromatography/mass spectrometry (Py-CG/MS) has been applied to study and compare the composition of two electrochemically synthesized polyaniline (PANI) forms: fully reduced leucoemeraldine (LE) and ...
Development and validation of LC-MS-based alternative methodologies to GC–MS for the simultaneous determination of triterpenic acids and dialcohols in virgin olive oil
(Elsevier, 2018-01)
Pentacyclic triterpenes are minor, but very relevant compounds found in virgin olive oil (VOO). A rapid and reliable LC-MS method for determining the triterpenic acids and dialcohols (after ultrasound assisted extraction) ...