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  • General
    General discussions not specific to any other category.
    Topics: 4
    Posts: 11
    Last post Also
    by eekamuffy View the latest post
    Fri Feb 08, 2019 7:53 am
  • Chromatography
    General discussion of factors that affect chromatographic resolution, peak shape, and noise in the raw data.
    Topics: 4
    Posts: 13
    Last post Re: Pinenes
    by Red Queen View the latest post
    Mon Jul 10, 2017 12:35 am
  • Data Systems
    All AutoGC systems collect, identify and quantitate the VOC targets using a data system. This category is dedicated to discussions of the methods used by data systems for this purpose. The data system may additionally control GC methods as well as thermal desorption methods, as well as relays used for the automation of introduction of routine quality control samples.
    Topics: 2
    Posts: 5
    Last post Re: Data Files
    by Red Queen View the latest post
    Wed Jul 12, 2017 11:23 pm
  • Thermal Desorption
    Ambient air samples are generally concentrated using adsorption on absorbents capable of trapping C2 - C12 hydrocarbons and then thermally desorbed into the gas chromatograph. This forum is for the discussion of issues found in the equipment and process of thermal desorption such as its effects on recoveries, retention times, and overall chromatographic effects caused by poor or incorrectly functioning thermal desorbers.
    Topics: 1
    Posts: 2
    Last post Re: Recoveries of Light Gases
    by Red Queen View the latest post
    Sat Dec 19, 2015 10:12 am
  • Quality Control
    This forum is dedicated to the discussion of issues related to quality control such as standards, calibrations, target recoveries and audits. Issues on the automation of regular quality control samples as well as identification and the evaluation of quality control checks may also be included here. The routine validation of the AutoGC data may also be addressed.
    Topics: 0
    Posts: 0
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  • Data Validation
    Validation of AutoGC data is the last step in preparation for submission to the EPA Air Quality System (AQS). There are several levels of validation from simple review of chromatography and quality controls to verify that the instrumentation is functioning within specification to more advanced comparisons with historical data and typical ambient air profiles.
    Topics: 0
    Posts: 0
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