Selective extraction of halogenated compounds from data measured by comprehensive multidimensional gas chromatography/high resolution time-of-flight mass spectrometry for non-target analysis of environmental and biological samples

► We developed a software finding organo-chlorines or bromines from netCDF mass data. ► We achieved to extracted organo-chlorines or bromines from data of GC × GC-HRTOFMS. ► For accurate data extraction, high mass resolution was essential. ► A mass defect filter was very effective in removing mass spectra of hydrocarbons. ► Direct measurement and data extraction were effective for non-target analysis.