title: Evaluation of comprehensive two-dimensional gas chromatography coupled to rapid scanning quadrupole mass spectrometry for quantitative analysis.
abstract: Comprehensive two-dimensional gas chromatography (GC×GC) is a powerful technique that provides excellent separation and identification of analytes in highly complex samples with considerable increase in GC peak capacities. However, since second dimension analyses are very fast, detectors with a rapid acquisition rate are required. Over the last years, quite a number of studies have discussed the potential and limitations of the combination GC×GC with a variety of quadrupole mass spectrometers. The present research focuses on the evaluation of qMS effectiveness at a 10,000-amu/s scan speed and 20-Hz scan frequency for the identification (full scan mode acquisition-TIC) and quantification (extracted ion chromatogram) of target pesticide residues in tomato samples. The following MS parameters have been evaluated: number of data points per peak, mass spectrum quality, peak skewing, and sensitivity. The validated proposed GC×GC/qMS method presented satisfactory results in terms of repeatability (coefficient of variation lower than 15%), accuracy (84-117%), and linearity (ranging from 25 to 500 ng/g), while significant enhancement in sensitivity was observed (a factor of around 10) under scan conditions.
authors: Departamento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14040-901, SP, Brazil.
authors: Bruno José Gonçalves
authors: BJ
authors: Silva
authors: Peter Quinto
authors: PQ
authors: Tranchida
authors: Giorgia
authors: G
authors: Purcaro
authors: Maria Eugênia Costa
authors: ME
authors: Queiroz
authors: Luigi
authors: L
authors: Mondello
authors: Fernando Mauro
authors: FM
authors: Lanças
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D016014:Linear Models; D018551:Solanum lycopersicum / Q000737:chemistry; D010573:Pesticide Residues / Q000032:analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D010573:Pesticide Residues