Agilent Technologies has published an application note on the use of automated backflush on its 7890A/5975A GC-MS system, with a specific example of monitoring biomarkers in crude oil.
The document details how implementing capillary column backflushing on the Agilent 7890A/5975A GC-MS system simplifies routine laboratory workflows. It highlights benefits such as increased sample throughput, reduced operating costs, and extended column life by removing high-boiling components before they deposit in the ion source.
The text provides a specific example of monitoring biomarkers in crude oil using ChemStation version E.01.00. It outlines the experimental setup involving a 3-way purged splitter and deactivated restrictor, along with step-by-step instructions for configuring software parameters to automate the backflush process effectively.
The application describes setup using ChemStation version E.01.00.
As a general guide, 10 void volumes is effective for most applications.