Instrumental Gas Analysis (IGA) is to accurately measure the Carbon (C), Sulfur (S), Oxygen (O), Nitrogen (N), and Hydrogen (H) content in solids, e.g. metals and ceramics.
Material forms
Small blocks, chips, powders, pins, or granules.
Amount:10mg to g
Process
load samples-> convert into gaseous form -> gas purification system-> detected by infrared absorption or thermal conductivity detector.
The techniques used in IGA include combustion analysis for C and S, and Inert Gas Fusion analysis for O, N, and H.
| Combustion | Inert gas fusion | |
| Atmosphere | Oxygen | inert gas, He OR Ar |
| Temperature | 1500C | |
| Heating | resistive or inductive furnace | Impulse furnace; graphite crucible |
| Generated gases | CO/CO2/SO2 | |
| Detector | Non-Dispersive Infrared Detector (NDIR) system | NDIR and thermal conductivity detector (TCD) |
| Elements to be analyzed | C and S | O, N, H |
Tool manufacturers
- Elementrac
Resolution
- ppm; bulk methods
References
- link
- video