Firma:              Perkin Elmer

Modell:            GC-IR 2000

Kommentar:   Dokumente engl.

Introduction

The System 2000 GC-IR Interface is used to obtain infrared spectra of the components that elute from a gas chromatograph (GC). Identification of the peaks in a chromatogram can be achieved by inspecting the infrared spectrum of each of the peaks. The end of the GC column passes through the heated transfer line to an infrared transmitting cell (light pipe). The eluate from the GC passes from the end of the column, into the light-pipe, and then returns to the GC through an inert, glass-lined return line (Figure 1-1). Both the transfer line and the glass-lined return line are enclosed in the heated transfer block that connects the GC to the Interface.

Schematic Diagram of the Gas Flow Within the GC-IR Interface

①    Column

②    Heated Transfer Line

③    Heated Glass-Lined Return Line

④    Flow Restrictor

⑤    Make-up Gas Connector

       (At the rear of the instrument)

⑥    Infrared Transmitting Window

⑦    Heated Light-pipe

       Direction of Gas Flow

The temperature of the light-pipe and transfer line is thermostatically controlled and is set using the Time Resolved Infrared (TR-IR) software.

Rear Panel of the GC-IR Interface

View of the GC-IR Interface with its Cover Removed

① Input Mirror

② Hole for Bolt

③ Plugged Hole (Used in Forward Configuration)

④ Oven Cover Fixing Screw

⑤ Electrical Connector

⑥ Detector

⑦ Screw Position for Fixing Cover

⑧ Baffle

⑨ Purge Outlet

⑩ Indicator Panel Connection

⑪ Output Mirror from Light-pipe

⑫ Make Up Gas Inlet

⑬ Transfer Line Input

⑭ Transfer Line Output

⑮ Oven Cover

⑯ Input Mirror to Light-pipe

⑰ Electrical Connection Block

⑱ Shielded Electronics