Emerging technologies for identification of disinfection byproducts: GC/FT-ICR MS characterization of solvent artifacts.
Environ Sci Technol
; 41(15): 5419-25, 2007 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-17822111
ABSTRACT
Water samples from a local water treatment plant were analyzed, using gas chromatography Fourier transform ion cyclotron resonance mass spectrometry (GC/FT-ICR MS), to identify potential disinfection byproducts (DBPs). Both liquid-liquid extraction (LLE) and solid-phase microextraction (SPME) techniques were used for sample preparation prior to GC/MS analyses. Based on the averaged mass measurement accuracy (MMA) of better than five parts-per-million (<5 ppm), multiple solvent artifacts were identified. It is shown that solventless SPME can be utilized to reduce potential interferences from solvent stabilizers. Six DBPs were detected and their molecular compositions were assigned at a high level of confidence. At the ppb concentration ranges and in the broadband mass spectral detection mode, internally calibrated mass spectra provided concurrent high resolution (resolving power M/deltaM50% > 30,000 at m/z values -110) and MMA of better than one part-per-million (MMA < 1 ppm). The use of thermochemical data, such as proton affinities, as a complementary tool to enhance analytical resolution is also demonstrated.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Solventes
/
Desinfecção
/
Artefatos
/
Cromatografia Gasosa-Espectrometria de Massas
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Ano de publicação:
2007
Tipo de documento:
Article