Measurement Principles
    OnlineAt-lineOff-line

    Gas Chromatography (GC)

    Gas chromatography separates and identifies gaseous substances and is used for purity testing, calorific value determination and emissions monitoring.

    Installation Types

    Online

    Automatic sampling via bypass loop — short analysis times, close to the process.

    At-line

    Sample analysed next to the line — flexible location, manual or automatic sampling.

    Off-line

    Laboratory analysis — highest accuracy, longer analysis times, spatially separated from the process.

    Standards & Regulations

    ISO 6974ASTM D1945EN 15984TA Luft17. BImSchV

    FAQ

    Dusko Kadijevic | Publisher Analytic Journal | analyticjournal.com

    Written October 2026. All content formulated in our own words, created with AI assistance.