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The development of the oil and gas complex is one priority areas Azerbaijan economy. Oil are among most competitive goods in high stable demand from global consumers. Therefore, increased attention paid to product quality. One methods for quality control petroleum products chromatography. Today it a widely used physical chemical research method. capabilities chromatography mainly determined by ...

This study examined the chemical composition of essential oil extracted from bark Alseodaphne peduncularis Meisn. (Lauraceae) by hydrodistillation with 0.2% yield. The was chemically characterised gas chromatography-flame ionization detector and chromatography-mass spectrometry, 31 constituents comprising 94.3% total content were identified. These included β-caryophyllene (24.5%), viridiflorol ...

Sir,—MacDonald and Mackenzie (1976) reported an alinear relationship between peak height and halothane concentration when measuring halothane (0.2—4.0%) with a gas chromatograph equipped with a flame ionization detector. Alinearity persisted when the sample loop size was reduced from 2 ml to 0.1 ml, and a linear response was obtained only when the flame ionization detector was replaced with a k...

We report a procedure for determining D-mannose in serum. After removal of proteins and lipids, the carbohydrate-containing fraction is treated to form the aldononitrile acetate derivative and analyzed by gas--liquid chromatography with a flame-ionization detector. D-Mannose and D-glucose had retention times of 31 and 34 min, respectively. Day-to-day reproducibilities (CV) of between 2 and 12% ...

background : the aims of this study were evaluation of exposed to xylenes in low concentration and compare urinary level of methyl hippuric acid in taxi drivers and petrol stations workers in west of iran. methods: this observation study was carried out on samples of the exposed men to xylenes in two occupational groups in hamadan city (west of iran) from march 2003 to march 2004. subjects incl...

the aim of this study was evaluation of phytochemical components, antioxidant activity, and antibacterial effects of basil (ocimum basilicum l.) essential oil (beo) in vitro. the lipid oxidation of the meat and antibacterial effects of beo were also evaluated in beef burger product. in this empirical study, essential oil of the basil was isolated by hydrodistillation. then, beo was analyzed by ...

Comprehensive two-dimensional gas chromatography (GCxGC) offers an interesting tool for profiling bacterial fatty acids. Flow modulated GCxGC using a commercially available system was evaluated, different parameters such as column flows and modulation time were optimized. The method was tested on bacterial fatty acid methyl esters (BAMEs) from Stenotrophomonas maltophilia LMG 958T by using para...

Hydrocarbons from samples of traffic-polluted urban air were separated by gas chromatography on an aluminium oxide column and assessed simultaneously by photoionization detection (PID) and flame ionization detection (FID) after effluent splitting. The 10.2 eV photoionization detector selectively detects alkadienes and alkenes but not alkanes and alkynes in the C3-C5 region. The maximum PID/FID ...