Phytochemical analysis of Cyperus rotundus hexane fraction by GC-MS and total oligomeric flavonoid fraction by 4D GCXGC TOF-MS

Characterization of oligomeric polypropyleneglycol acrylate by GC, SFC and MALDI-TOF-MS.

Polypropyleneglycol acrylate (PGA), one of the typical acrylic oligomers manufactured industrially, was comprehensively characterized by gas chromatography (GC), supercritical fluid chromatography (SFC) and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS). The homologous series of polypropyleneglycol diacrylate (DA), polypropyleneglycol monoacrylate (M...

Use of Soft and Hard Ms Ionization Techniques for Unknown Compounds Elucidation by Gc-tof Ms

Investigation of trace level non-target compounds by GC-MS often is a challenging task that requires powerful software tools to detect the unknown components, to obtain the deconvoluted mass spectra, and to interpret the data if no acceptable library match is obtained. In this paper, the complementary use of EI and CI is investigated in combination with GCTOF MS for the elucidation of organic n...

Stereochemical Analysis of Monodeuterated Isomers By GC/MS/MS

GC/MS/MS techniques to quantitate mixtures of acyclic stereoisomers are explored for a set of secondary n-alkyl phenyl ethers vicinally substituted with deuterium. Examination of a set of test compounds using a commercial quadrupole ion trap instrument (GC/QIT) reveals large differences between threo and erythro diastereomers when trapped molecular ions expel neutral alkene as a result of colli...

Multi-residue Method for Pesticides Residue Analysis in Grapes by GCxGC-TOF-MS

Chemical Analysis of Pesticides Using GC/MS, GC/MS/MS, and LC/MS/MS

There are well over 500 registered pesticides worldwide for use in agricultural regions and new agrochemicals are introduced to the marketplace continuously. This chapter deals with the chemical analysis methods for the main pesticide chemical classes that are most frequently analyzed with gas chromatography (GC) or liquid chromatography (LC) coupled to mass spectrometry (MS). GC amenable pesti...

Phytochemical Screening and GC-MS Analysis of Drynaria quercifolia Rhizome

The investigation was carried out to determine qualitatively the phytoconstituents from the methanol and petroleum ether extracts of Drynaria quercifolia Linn. rhizome. Among the phytochemical screening of these extract, methanolic extract showed high number of constituents like alcohol, carbohydrates, phytosterols, phenols, tannins, flavonoids, proteins and aminoacids, steroids, saponins, chol...