Thermogravimetric Analysis (TGA) is an analytical technique that studies the thermal stability, decomposition process, and composition of materials by measuring mass changes with temperature or time. The basic principle is to record real-time mass changes of samples in a programmed temperature-controlled environment (heating, cooling, or isothermal), thereby revealing physical (e.g., volatilization, sublimation) or chemical (e.g., decomposition, oxidation, reduction) reactions during heating.
Instrument Model and Technical Parameters
- Instrument Model: Mettler TGA2
- Technical Parameters:
- Temperature range: Room temperature–1500°C
- Temperature accuracy: ±0.01°C
- Heating rate: 0.1–100°C/min
- Atmosphere: N₂, air
Sample Submission Requirements and Packaging
- Sample quantity: 20–100 mg (packed in a plastic centrifuge tube)
- Sample form: Liquid or solid
- Samples must be free of low-boiling solvents or water.
- Samples must not crack, explode, volatilize, or produce highly toxic gases within the testing temperature range, as this may cause irreversible damage to the instrument.
Testing Examples
Reference Standards
- ISO 247-2:2018 "Rubber - Determination of ash - Part 2: Thermogravimetric analysis (TGA)"
- IEC TS 62607-6-18:2022 "Nanomanufacturing - Key control characteristics - Functional groups of graphene-based materials: TGA-FTIR"
- STANAG 4515-2015 "Thermal Analysis of Explosives Using Differential Thermal Analysis (DTA), Differential Scanning Calorimetry (DSC), Heat Flow Calorimetry (HFC), and Thermogravimetric Analysis (TGA) (ED2)"
- ASTM E2105-00(2024) "Standard Practice for General Techniques of Coupling Thermogravimetric Analysis (TGA) with Infrared Analysis (TGA/IR)"
- ASTM D6370-23 "Standard Test Method for Composition Analysis of Rubber by Thermogravimetric Analysis (TGA)"
- ASTM D8474-23 "Standard Test Method for Recycled Carbon Black (rCB) - Composition Analysis by Thermogravimetric Analysis (TGA)"
- ASTM D6375-24 "Standard Test Method for Evaporation Loss of Lubricating Oils by the Noack Method Using a Thermogravimetric Analyzer (TGA)"
- ASTM D3850-19 "Standard Test Method for Rapid Thermal Degradation of Solid Electrical Insulating Materials by Thermogravimetry (TGA)"
