Analytical Equipment

Method_Development

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Method Development — GCsolution

This page covers creating, configuring, and saving method files (.gcm) in GCsolution for the Shimadzu GC-2025.

Create a New Method

  1. Launch GCsolution → GC Real Time Analysis → log in
  2. Software auto-loads the last used method on startup
  3. To create new: click New (or New Method File) on toolbar, or File → New Method File
  4. Title bar shows “Untitled” — all parameters reset to defaults

📋 From manual

Set Injection Parameters

Open Instrument Parameters (icon on Assistant Bar).

Auto-sampler tab:

  • Set Injection Volume (e.g., 1 µL)

Injection unit tab (e.g., SPL1):

  • Set injection port Temperature (high enough to vaporize sample)
  • Select Flow Control Mode (e.g., Linear Velocity)
  • Enter Linear Velocity and Split Ratio
  • Total flow and column flow auto-calculate

For guidance on choosing split vs splitless, see Split_vs_Splitless_Injection.

📋 From manual

Temperature Program

Column tab:

  1. Enter initial oven Temperature
  2. Enter Equilibration Time (e.g., 3.0 min)
  3. In the Temperature Program table, for each ramp enter:
    • Rate (°C/min)
    • Temperature (°C)
    • Hold Time (min)
  4. Click Redraw to visualize the program on the graph

⚠️ CRITICAL: Column oven temperature must always be lower than detector temperature.

For the theory behind temperature effects on separation, see 1. Temperature.

📋 From manual

Set Detector Parameters

Detector tab (e.g., FID1):

  • Set detector Temperature

By default, the detector acquisition stop time is linked to the oven program total time. To unlink: right-click → deselect “Link Oven Program and Acquisition Time”.

General tab:

  • Check Auto Flame On → flame auto-ignites when GC reaches ready state

FID Gas Flow Rates

GasDefault Flow
Hydrogen (H₂)40.0 mL/min
Air400.0 mL/min
Makeup (He/N₂)30.0 mL/min

For how FID detection works, see Flame_Ionization_Detection.

📋 From manual

Save and Download

  1. File → Save Method File As → name the file (saved as .gcm)
  2. The method file stores: device parameters, data processing parameters, and QA/QC parameters
  3. Click Download Parameters icon to send settings to the GC

📋 From manual

See Also

Graph View

Backlinks