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Stir-bar-sorptive extraction and liquid desorption combined with large-volume injection gas chromatography-mass spectrometry for ultra-trace analysis of musk compounds in environmental water matrices
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Stir-bar-sorptive extraction and liquid desorption combined with large-volume injection gas chromatography-mass spectrometry for ultra-trace analysis of musk compounds in environmental water matrices
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Journal Article
Stir-bar-sorptive extraction and liquid desorption combined with large-volume injection gas chromatography-mass spectrometry for ultra-trace analysis of musk compounds in environmental water matrices
2010
Overview
Stir-bar-sorptive extraction with liquid desorption followed by large-volume injection and capillary gas chromatography coupled to mass spectrometry in selected ion monitoring acquisition mode (SBSE-LD/LVI-GC-MS(SIM)) has been developed to monitor ultra-traces of four musks (celestolide (ADBI), galaxolide (HHCB), tonalide (AHTN) and musk ketone (MK)) in environmental water matrices. Instrumental calibration (LVI-GC-MS(SIM)) and experimental conditions that could affect the SBSE-LD efficiency are discussed. Assays performed on 30-mL water samples spiked at 200 ng L⁻¹ under optimized experimental conditions yielded recoveries ranging from 83.7 ± 8.1% (MK) to 107.6 ± 10.8% (HHCB). Furthermore, the experimental data were in very good agreement with predicted theoretical equilibria described by octanol-water partition coefficients (K PDMS/W ≈ K O/W). The methodology also showed excellent linear dynamic ranges for the four musks studied, with correlation coefficients higher than 0.9961, limits of detection and quantification between 12 and 19 ng L⁻¹ and between 41 and 62 ng L⁻¹, respectively, and suitable precision (< 20%). Application of this method for analysis of the musks in real water matrices such as tap, river, sea, and urban wastewater samples resulted in convenient selectivity, high sensitivity and accuracy using the standard addition methodology. The proposed method (SBSE-LD/LVI-GC-MS(SIM)) was shown to be feasible and sensitive, with a low-sample volume requirement, for determination of musk compounds in environmental water matrices at the ultra-trace level, overcoming several disadvantages presented by other sample-preparation techniques.
Publisher
Berlin/Heidelberg : Springer-Verlag,Springer-Verlag,Springer
Subject
/ capillary gas chromatography
/ Characterization and Evaluation of Materials
/ Chemistry and Materials Science
/ Chromatographic methods and physical methods associated with chromatography
/ Environmental water matrices
/ Exact sciences and technology
/ Gas Chromatography-Mass Spectrometry
/ Global environmental pollution
/ Liquids
/ Matrices
/ Monitoring/Environmental Analysis
/ Musk
/ octanol-water partition coefficients
/ rivers
/ Solid Phase Extraction - methods
/ Spectrometric and optical methods
/ Stir-bar-sorptive extraction
/ Tetrahydronaphthalenes - analysis
/ Water
/ Water Pollutants, Chemical - analysis
