[PDF] Top 20 Determination of polycyclic aromatic hydrocarbons in soil by gas chromatography-mass spectrometry

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... occurrence of the endocrine disruptor compounds, such as 4-nonylphenol isomers and bisphenol A was determined in surface water samples from ...preconcentration of 200 mL of water sample ... See full document

... lack of literature reports concerning the use of MSPD as an extraction technique for pesticides belonging to different chemical classes from medicinal plants (different plants and herbs exhibit different ... See full document

... (abundance) of light elements is frequently carried out using properly purified gaseous ...transformation in order to eliminate gas interferences, and the combustion process for SO 2 production ... See full document

... a gas chromatograph HP 7890A coupled with a mass spectrometer model 7890B from Agilent ...constituted of 5% de phenylmethylsiloxane (30m x 0,25 mm; 0,25 um ...acquired in selected ion ... See full document

... 7820A gas chromatograph, with flame ionization detector (FID) equipped with a split/splitless injector and an Agilent DB-5 capillary column (30 m × ...parameters of merit, a comparison between the ... See full document

... IDENTIFICATION OF ORGANIC COMPOUNDS IN A MUNICIPAL LANDFILL LEACHATE BY GAS CHROMATOGRAPHY COUPLED WITH MASS ...present in leachate can contaminate soil, ... See full document

... # Serbian Chemical Society member.[r] ... See full document

... variability in scavenging efficiencies has also been sug- gested between rain events originated from warm and cold clouds (Bidleman, ...number of studies observed vari- ations in scavenging ... See full document

... O objetivo do presente estudo foi validar um método de extração, envolvendo a utilização de ultrassom e a extração em fase sólida (EFS), seguida de cromatografia a gás (CG) acoplada à [r] ... See full document

... activity of essential oils obtained from agarwood originating from Aquilaria sinensis ...induced by a biological agent of agarwood, Lasiodiplodia theobromae (F), were characterized and compared to ... See full document

... obtained by eluting it with 60 ml of hexane/dichloromethane ...stream of filtered purified nitrogen gas. An aliquot of 0.2 ml of each extract was applied to gas ... See full document

... eutrophication of lakes and rivers, adversely affecting biological diversity and water ...levels in the sludge and sludge liquors can lead to formation of magnesium ammonium phosphate hexahydrate, ... See full document

... (-15ºC) in aluminium containers. After drying in an oven at 50ºC until constant weight, 25g of each sediment sample were Soxhlet extracted during 8 h with a 50% mixture of n-hexane and ... See full document

... µL of solution injection, were less than 9,917 ng/g in UV detection and less than 1,866 ng/g in luorescence ...extraction of the 17 PAHs from ...order of the extraction eficiencies was: ... See full document

... liquid chromatography having UV/visible detector was used for identification and quantification of ...condition of HPLC was binary gradient, mobile phase was acetonitrile: water; (70:30), flow rate ... See full document

... levels in milligrams to grams per litre during in vitro bacterial growth and they typically are pigmented with absorption spectra that include two distinct maxima in the UV range and at least one ... See full document

... analyzed by GC-MS. Different profiles were found between the extracts as much by the difference between the solvents (hexane and ethanol) as by the difference of the matrix (leaves and ... See full document

... RESIDUE DETERMINATION IN CATTLE PLASMA BY GAS CHROMATOGRAPHY-MASS ...and gas chromatographic determination of pesticides in cattle plasma is ...g ... See full document

... UTILIZATION OF SOLID-PHASE EXTRACTION (SPE) FOR THE DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS IN ENVIRONMENTAL AQUEOUS ...MATRICES. Polycyclic ... See full document