Non-invasive quantification of ethylene in attached fruit headspace at 1 p.p.b. by gas chromatography-mass spectrometry

Identification of volatile organic compounds of some Trichoderma species using static headspace gas chromatography-mass spectrometry

Fungi release wide spectrum of volatile organic compounds (VOCs) that belong to several chemical groups with different biochemical origins such as monoterpenes, sesquiterpenes, alcohols, aldehydes, aromatic compounds, esters, furans, ketones, sulfur and nitrogen compounds. Trichoderma species are the most studied fungal biocontrol agents and are successfully used as biofungicides and biofertili...

اندازه گیری سریع ترکیبات آلی فرار در ماست به کمک دستگاه Headspace-Gas Chromatography/Mass Spectrometry

Determination of ketone bodies in blood by headspace gas chromatography-mass spectrometry.

A gas chromatography-mass spectrometry (GC-MS) method for determination of ketone bodies (β-hydroxybutyrate, acetone, and acetoacetate) in blood is presented. The method is based on enzymatic oxidation of D-β-hydroxybutyrate to acetoacetate, followed by decarboxylation to acetone, which was quantified by the use of headspace GC-MS using acetone-(13)C(3) as an internal standard. The developed me...

Determination of Furan in Food by Gas Chromatography-Mass Spectrometry and Headspace Sampling

Furan is naturally occurring at low levels in many foods and drinks.1 Furan consumption is of concern because it has been classified by the International Agency for Research on Cancer (IARC) as possibly carcinogenic to humans, based on studies with laboratory animals. The U.S. FDA has recently published a report on the occurrence of furan in a large number of thermally processed foods, especial...

Determination of 1,1,1,2,3,3,3-heptafluoropropane (HFP) in blood by headspace gas chromatography-mass spectrometry.

The inert and certified medical gas 1,1,1,2,3,3,3-heptafluoropropane (HFP) is commonly used as a propellant in medical sprays. HFP is also of interest as tracer gas for lung function measurements. In this work a sensitive method for quantitative determination of HFP in blood was developed using headspace gas chromatography-mass spectrometry with N2 as internal standard. The limits of detection ...