Comment on 'Comprehensive Profiling of Coal Tar and Crude Oil to Obtain Mass Spectra and Retention Indices for Alkylated PAH Shows Why Current Methods Err'

摘要

A recent report using two-dimensional gas chromatography coupled with mass spectrometry (GCxGC/MS) concluded, "Currently employed SIM/SIE methods produce inaccurate and imprecise measurements, which lead to faulty toxicological assessments and, ultimately, risk-based decisions. We find that their conclusion that GC/MS methods with selected ion monitoring (GC/MS-SIM) "produce inaccurate and imprecise measurements..." is unjustified.