Compound-Specific Chlorine Isotope Analysis of Organochlorine Pesticides by Gas Chromatography-Negative Chemical Ionization Mass Spectrometry

<div>A comparison of mass spectrum from electron ionization (EI) and negative chemical ionization (NCI) of <i>α</i>-hexachlorocyclohexane (<i>α</i>-HCH). (a) EI mass spectrum extracted from NIST Database V 2.0; (b) NCI mass spectrum in SCAN mode obtained in this study.</div>

Journal of Analytical Methods in Chemistry

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Figure 2: Compound-Specific Chlorine Isotope Analysis of Organochlorine Pesticides by Gas Chromatography-Negative Chemical Ionization Mass Spectrometry 

Figure 2 | Compound-Specific Chlorine Isotope Analysis of Organochlorine Pesticides by Gas Chromatography-Negative Chemical Ionization Mass Spectrometry 