development and optimisation of fast, efficient, quantitative, economic and environmentally friendly analytical extraction techniques for the extraction clean up, and pre-concentration in the quantification of 16 usepa priority polycyclic aromatic hydrocarbons (pahs) in contaminated soils have been carried out. three different extraction methods (soxhlet, ultra sonication and mechanical shaking...

Background & Aim:Nepeta racemosa is an herbal and medicinal plant and this report aims to   identify chemical compositions of the essential oils and volatiles of its   aerial parts through classical and advanced methods.  Experimental: Chemical profiles of the essential oils and volatile compounds from the aerial parts of Nepeta racemosa obtai...

The aim of this review is to explore and discuss the two main aspects related a HeadSpace Solid Phase Micro-Extraction Gas-Chromatography/Mass-Spectrometry (HS-SPME-GC/MS) quantitative analysis volatile compounds in wines, both being fundamental obtain reliable data. In first section, recent advances use multivariate optimization approaches during method development step are described with spec...

Cold extraction methods with ethanol applied to the flavedo of Citrus fruits have been commonly for preparation several liquors. In order obtain optimization and then best ratio functional ingredients in extract, grandis Osbeck (pummelo) was subjected a maceration absolute at room temperature as well 40 °C. The kinetics were monitored by UV–VIS spectroscopy, chemical fingerprint characteristic ...

A simple, low-cost, and effective cooling/heating-assisted headspace solid-phase microextraction (CHA-HS-SPME) device, capable of direct cooling the fiber to low temperatures and simultaneous heating the sample matrix to high temperatures, was fabricated and evaluated. It was able to cool down the commercial and handmade fibers for the effective tapping of volatile and semi-volatile species in ...

ANAMARIA HANGANU1*, MARIA-CRISTINA TODASCA2, FULVIA-ANCUTA MANOLACHE3, SORIN ROSCA2 1Romanian Academy, Organic Chemistry Center “Costin D. Nenitzescu” 202B Splaiul Independentei, 060023, Bucharest, Romania 2 University “Politehnica” of Bucharest, Faculty of Applied Chemistry and Materials Science, “ Costin D. Nenitzescu” Organic Chemistry Department, 1-7 Polizu Str., 011061, Bucharest, Romania ...

Glycol ethers still continue to be a workplace hazard due to their important use on an industrial scale. Currently, chronic occupational exposures to low levels of xenobiotics become increasingly relevant. Thus, sensitive analytical methods for detecting biomarkers of exposure are of interest in the field of occupational exposure assessment. 1-Methoxy-2-propanol (1M2P) is one of the dominant gl...

Background & Aim:Nepeta racemosa is an herbal and medicinal plant and this report aims to   identify chemical compositions of the essential oils and volatiles of its   aerial parts through classical and advanced methods.  Experimental: Chemical profiles of the essential oils and volatile compounds from the aerial parts of Nepeta racemosa obtai...

Smokeless powder additives are usually detected from an extraction of post-blast residues or unburned powder particles followed by chromatographic analyses. This work presents the first comprehensive study of the detection of volatile and semi-volatile additives of smokeless powders using solid phase microextraction (SPME) as a sampling and pre-concentration technique. The goal of this study is...

Nanocrystalline mixed metal oxides (MMO) of various metal cations were synthesized and were used for coating a piece of copper wire as a new high sensitive solid phase micro extraction (SPME) fiber in extraction and determination of BTEX compounds from the headspace of aqueous samples prior to GC-FID analysis. Under optimum extraction conditions, the proposed fiber exhibited low detection limit...