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Multiresidue analysis of acidic and polar organic contaminants in water samples by stir-bar sorptive extraction–liquid desorption–gas chromatography–mass spectrometry

Quintana, José Benito ; Rodil, Rosario ; Muniategui-Lorenzo, Soledad ; López-Mahía, Purificación ; Prada-Rodríguez, Darío

Journal of Chromatography A, 2007-12, Vol.1174 (1), p.27-39 [Revista revisada por pares]

Amsterdam: Elsevier B.V

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Multiresidue analysis of acidic and polar organic contaminants in water samples by stir-bar sorptive extraction–liquid desorption–gas chromatography–mass spectrometry
Autor: Quintana, José Benito ; Rodil, Rosario ; Muniategui-Lorenzo, Soledad ; López-Mahía, Purificación ; Prada-Rodríguez, Darío
Materias: Acetates - chemistry ; alkylphenols ; Analysis methods ; Analytical chemistry ; Applied sciences ; bromophenols ; chemical residues ; Chemistry ; chlorophenols ; Chlorophenols - chemistry ; Chromatographic methods and physical methods associated with chromatography ; Derivatisation ; desorption ; dicamba ; Drinking water and swimming-pool water. Desalination ; drug residues ; Exact sciences and technology ; extraction ; Gas chromatographic methods ; gas chromatography ; Gas Chromatography-Mass Spectrometry - methods ; Gas chromatography–mass spectrometry (GC–MS) ; herbicide residues ; Herbicides ; Hydrogen-Ion Concentration ; Large volume injection (LVI) ; liquid desorption ; mass spectrometry ; Molecular Weight ; multiresidue analysis ; Natural water pollution ; nitrophenols ; Organic Chemicals - analysis ; Other wastewaters ; Pharmaceuticals ; Phenols ; phenoxy acid herbicides ; pollutants ; Pollution ; Programmed temperature vaporisation (PTV) ; Reproducibility of Results ; Silylation ; Solid Phase Extraction - methods ; stir-bar sorptive extraction ; Stir-bar sorptive extraction (SBSE) ; Time Factors ; Waste Disposal, Fluid ; Wastewaters ; Water - chemistry ; Water Pollutants, Chemical - analysis ; water pollution ; Water samples ; Water treatment and pollution
Es parte de: Journal of Chromatography A, 2007-12, Vol.1174 (1), p.27-39
Notas: http://dx.doi.org/10.1016/j.chroma.2007.07.088
Descripción: The feasibility of stir-bar sorptive extraction (SBSE) followed by liquid desorption in combination with large volume injection (LVI)-in port silylation and gas chromatography–mass spectrometry (GC–MS) for the simultaneous determination of a broad range of 46 acidic and polar organic pollutants in water samples has been evaluated. The target analytes included phenols (nitrophenols, chlorophenols, bromophenols and alkylphenols), acidic herbicides (phenoxy acids and dicamba) and several pharmaceuticals. Experimental variables affecting derivatisation yield and peak shape as a function of different experimental PTV parameters [initial injection time, pressure and temperature and the ratio solvent volume/ N-( tert-butyldimethylsilyl)- N-methyltrifluoroacetamide (MTBSTFA) volume] were first optimised by an experimental design approach. Subsequently, SBSE conditions, such as pH, ionic strength, agitation speed and extraction time were investigated. After optimisation, the method failed only for the extraction of most polar phenols and some pharmaceuticals, being suitable for the determination of 37 (out of 46) pollutants, with detection limits for these analytes ranging between 1 and 800 ng/L and being lower than 25 ng/L in most cases. Finally, the developed method was validated and applied to the determination of target analytes in various aqueous environmental matrices, including ground, river and wastewater. Acceptable accuracy (70–130%) and precision values (<20%) were obtained for most analytes independently of the matrix, with the exception of some alkylphenols, where an isotopically labelled internal standard would be required in order to correct for matrix effects. Among the drawbacks of the method, carryover was identified as the main problem even though the Twisters were cleaned repeatedly.
Editor: Amsterdam: Elsevier B.V
Idioma: Inglés

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Multiresidue analysis of acidic and polar organic contaminants in water samples by stir-bar sorptive extraction–liquid desorption–gas chromatography–mass spectrometry

Quintana, José Benito ; Rodil, Rosario ; Muniategui-Lorenzo, Soledad ; López-Mahía, Purificación ; Prada-Rodríguez, Darío

Amsterdam: Elsevier B.V

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