A method for the determination of trace amounts of the herbicide oxadiazon was developed using headspace solid-phase microextraction (HS-SPME), gas chromatography-mass spectrometry (GC-MS) and selected ion monitoring. It was applied to determine oxadiazon in ground water, agricultural soil, must, wine and human urine samples. To determine oxadiazon in liquid samples, a response surface methodol...

The volatile constituents obtained from Juniperus communis berries by the application of different methods, Hydro distillation (HD), Super Critical Fluid Extraction (SFE) and Headspace (HSE) static technique were examined as regards their qualitative and quantitative composition. Significant differences were noticed among the percentages of the main components of the extracts: the monoterpene h...

The volatile components of Citrus aurantium L. flowers were characterized by GC-MS with two different extraction techniques, hydrodistillation (HD) and ultrasonic-assisted headspace solid phase microextraction (UA-HS-SPME). In the SPME method, the volatile components of the samples, irradiated by ultrasonic radiation, were collected on a polydimethyl siloxane (PDMS) commercial fiber as...

Abstract Headspace-gas-chromatography ion-mobility spectrometry (HS-GC-IMS) proved the diversity of volatile chlorinated compounds (VCCs) in frying oil this work. First, VCCs were obtained by headspace heating at 80 °C for 30 min. Then, those separated GC capillary column first dimension and IMS second dimension, respectively. And last, detected negative ion mode non-targeting. The study result...

Quality Control of Poly(Methyl Methacrylate) to Medical Purpose by Multiple Headspace Extraction Lamia Zuniga Linan,* Anderson Bonon, Nádson M. N. Lima, Rubens Maciel Filho, Flavio Manenti a Instituto de Biofabricação (BIOFABRIS), School of Chemical Engineering. State University of Campinas, UNICAMP, Campinas-SP, Brazil. b Politecnico di Milano, CMIC Dept. “Giulio Natta”, Piazza Leonardo da Vin...

In the course of our continuing work on transformation of monoterpenes by microorganisms, the biotransformation of (+)- and (-)-carvone was carried out. The metabolites formed during microbial transformations were screened using a simple, rapid and efficient technique: Headspace-solid phase microextraction (SPME)/GC-MS. The results as well as the application of this technique are described.

The volatile compounds of a largely consumed Brazilian cashew apple variety (Anacardium occidentale L. var. nanum, Anacardiaceae) were recovered by headspace extraction or simultaneous distillation-extraction. Several compounds including esters (29), terpenes (16), hydrocarbons (9), carboxylic acids (7), aldehydes (7), alcohols (3), ketones (2), lactones (2) and norisoprenoids (1) were characte...