Prepared standards of halothane in oxygen were analysed using a Pye Series 104 gas chromatograph equipped with a heated head flame ionization detector and gas sampling valve. The adoption of a positive jet voltage expanded the linear dynamic range of the detector to cover the 0.5-9.0% by volume range, provided that a small (0.5-ml) sample loop was used.

Gas oils (GOs) analysis is essential for production process control, in order to meet quality standards, render these products safer the environment, and support research alternative fuels. GOs quantitative can be commonly achieved by employing two-dimensional comprehensive gas chromatography with flame ionization detection (GC × GC-FID) combination identification templates. However, perform qu...

The chemical composition and seasonal variation of essential oils (EO) extracted from the aerial parts traditional medicinal plant Piper rivinoides were analyzed using gas chromatography (GC) coupled with mass spectrometry (MS) GC flame ionization detector (GC-FID) technique, respectively. wild plants collected two different sites in Atlantic Forest. analysis allowed us to identify 96.60 99.80%...

Authors discuss problems with identification and determination of flunitrazepam and zolpidem in biological material (BM). Over the recent years, these two structurally different substances have become the most frequently used as well as abused hypnotic drugs. This study presents applicability of immunochemical methods in the screening of flunitrazepam, one of the most commonly prescribed drugs ...

Oleoresin samples collected directly from living-trees by three different tapping methods, and four geographical origins were analyzed using two gas chromatography (GC) methods. The GC was coupled to a flame ionization detector (GC-FID) for quantification, mass spectrometer (GC-MS) identifying the chemical composition. Twenty-eight components detected quantified. proportions of each component v...

A simple and rapid method for determination of 17 -estradiol in pharmaceutical preparation was developed and validated using gas chromatography with flame ionization detection (GC-FID). The solutions of standard and the sample were prepared in methanol. GC separation was performed in about 7.7 min using a 30 m x 0.32 mm I.D. (film thickness 0.25 μm) HP-5 capilary column. Nitrogen was used as c...

Fast pyrolysis bio-oils are feasible energy carriers and a potential source of chemicals. Detailed characterization of bio-oils is essential to further develop its potential use. In this study, quantitative 13C nuclear magnetic resonance (13C NMR) combined with comprehensive two-dimensional gas chromatography (GC × GC) was used to characterize fast pyrolysis bio-oils originated from pinewood, w...

The aim of this study was to identify the chemical composition Piper arboreumAubl. essential oil (EO), and evaluate its inhibitory activity in vitroagainst enzymes butyrylcholinesterase (BuChE) acetylcholinesterase (AChE). EO obtained by steam distillation leaves, which were collected Pindal canton Loja province southern Ecuador. analyzed using gas chromatography technique coupled a mass spectr...

AbstractThe oldest method for the managing of the illness is the use of medicinal plants. The use of herbal products as the first choice in self-treatment of minor conditions continues to expand rapidly across Iran. This makes the safety of herbal products an important public health issue.Pesticides are used widely in agriculture to increase the production by controlling the harmful insects and...

ArDM is a new-generation WIMP detector which will measure simultaneously light and charge from scintillation and ionization of liquid argon. Our goal is to construct, characterize and operate a 1 ton liquid argon underground detector. The project relies on the possibility to extract the electrons produced by ionization from the liquid into the gas phase of the detector, to amplify and read out ...