Agilent 7890A gas chromatograph GC x GC technology introduction
This document presents an application brief for a comprehensive flow modulated two-dimensional gas chromatography (GC x GC) system. The methodology utilizes two capillary columns with different polarities and a unique flow modulator interfaced to an Agilent 7890A gas chromatograph via a three-way solenoid valve and programmable control module.
The system is based on Agilent's Capillary Flow Technology hardware, which eliminates the need for cryogenics typically required for focusing in thermal modulation systems. The flow modulator uses a planar structure with internal flow splitters and collector channels connected via CPM fittings to ensure zero unswept volumes and leak-proof seals.
The FID operates at a data collection rate of 200 Hz.
The modulator period consists of a 1.4 second collect phase followed by a 0.12 second flush.
The oven program heats up to a maximum of 260 °C.