9. Pesticide analysis with a VICI pulsed discharge detector (PDD)   Courtesy of Ohio University’s Center for Intelligent Chemical Instrumentation Glen P. Jackson and Anthony R. J. Andrews, Ph.D.   Analysis of pesticide residues in soil, water, and food is crucial for maintaining safe levels in the environment. The PDD in the ECD mode is highly selective for monitoring electron capturing compounds such as chlorinated pesticides and other halogens. This chromatogram illustrates the sensitivity of the non-radioactive PDECD for such compounds.     Sample: Pesticide calibration mix Detector mode: Electron capture Detector temp: 330°C Column: 25 m x 0.32 mm x 25 µm, HP-5 Column temp: 150°C to 300°C at 10°C/min Sample volume: 1 µL, 10:1 split Discharge gas: Helium, 30 mL/min Dopant gas: 5% methane in helium, 2.4 mL/min Attenuation: 1 Additional chromatograms 1.  10 ppt SF6 in ultrapure air 2.  30 ppb vinyl chloride in nitrogen 3.  Haloalkanes mixture in methanol 4.  Hydrocarbon analysis 5.  Impurities in food grade CO 2 6.  N2 , O2 , and CO2 in acrylic syrup 7.  Natural gas liquid (NGL) 8.  n-Paraffin wax standard 9.  Pesticide analysis 10.  Trace impurities in high purity hydrogen 11.  Trace impurities in bulk gases 12.  Hydrocarbon analysis (comparing FID and PDD) 13.  Impurities in hydrocarbon feedstocks 14.  PAH residues in soil from a Superfund site 15.  PAH residues in an environmental soil sample spike 16.  Herbicides in soil samples using EPA Method 8151
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