Thermogravimetry/Evolved Gas Analysis (TG-EGA)

TG-EGA is used for simultaneous thermo-gravimetric and chemical analysis of a sample. In the TG-EGA technique, the evolved gases from controlled heating of a sample are routed to an Evolved Gas Analysis (EGA) system, which may use FTIR, MS or GC-MS for compositional analysis.

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Thermogravimetry/Evolved Gas Analysis (TG-EGA)

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Overview
Scope, Applications, and Benefits
Test Process
Specifications
Instrumentation
Results and Deliverables

Overview

Thermogravimetry/Evolved Gas Analysis (TG-EGA) is an advanced analytical technique that combines thermogravimetric analysis with gas detection methods to study material decomposition in detail. While TGA measures weight changes during heating, EGA identifies and quantifies gases released, providing deeper insights into thermal degradation mechanisms and material composition.

This combined approach is widely used in polymers, pharmaceuticals, chemicals, and environmental studies to understand complex thermal behaviors. TG-EGA helps identify volatile components, decomposition pathways, and reaction by-products, supporting product development, failure analysis, and regulatory compliance with high accuracy and reliability.

Scope, Applications, and Benefits

Scope

TG-EGA evaluates material behavior under controlled heating by measuring weight changes and simultaneously analyzing evolved gases, providing comprehensive thermal and compositional insights.

Applicable to polymers, chemicals, pharmaceuticals, and composites
Measures thermal decomposition and gas evolution
Identifies volatile and degradation products
Supports advanced material characterization
Ensures compliance with ASTM, ISO, and related standards

Applications

Polymer decomposition analysis
Pharmaceutical stability studies
Chemical composition and reaction analysis
Environmental emission studies
Failure and contamination analysis

Benefits

Provides combined thermal and gas analysis data
Identifies decomposition pathways and by-products
Enhances understanding of material behavior
Supports accurate material characterization
Improves product quality and safety

Test Process

Sample Preparation

The sample is weighed and placed in a TGA furnace for controlled thermal analysis.

Instrument Setup

The TGA is coupled with gas analysis systems and calibrated for temperature and gas detection.

Thermal Decomposition

The sample is heated while monitoring weight change and evolved gases simultaneously.

Gas Analysis & Interpretation

Released gases are analyzed to identify composition and correlate with thermal events.

Technical Specifications

Parameter	Details
Temperature range	Ambient to 1000°C or higher
Heating rate	Typically 5–20°C/min
Gas analysis methods	FTIR, Mass Spectrometry (MS), Gas Chromatography (GC)
Measurement	Weight change and gas composition
Sample size	Typically 5–20 mg
Output	TG curves, gas spectra, and decomposition profiles

Instrumentation Used for Testing

Thermogravimetric Analyzer (TGA)
FTIR gas analyzer
Mass spectrometer (MS)
Gas Chromatograph (GC)
Gas transfer interface system

Results and Deliverables

TG and DTG curves
Evolved gas spectra and identification
Decomposition temperature and stages
Correlation of weight loss with gas evolution
Detailed analytical test report

Why Choose Infinita Lab for Thermogravimetry/Evolved Gas Analysis?

Infinita Lab is a trusted USA-based testing laboratory offering Thermogravimetry/Evolved Gas analysis testing services across an extensive network of accredited facilities across the USA.

Infinita Lab is built to serve the full spectrum of modern testing needs—across industries, materials, and methodologies. Our advanced equipment and expert professionals deliver highly accurate and prompt test results, helping businesses achieve quality compliance and product reliability.

Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote

Frequently Asked Questions

TG-EGA is a technique that combines thermogravimetric analysis with gas analysis methods to study materials during heating. It measures weight changes and identifies gases released, providing detailed insights into decomposition and chemical behavior.

Unlike standard TGA, TG-EGA provides both weight change and gas composition data. This combination allows deeper understanding of decomposition processes, making it more informative for complex material analysis.

Depending on the analyzer used, A. TG-EGA can measure different gases based on their types, such as CO2, H20, and other volatiles.

Polymer, ceramic, metal, and composite materials that degrade when subjected to high temperatures are also congratulated for their designs because of their three-dimensional structure.

It provides in-depth information on thermal stability, composition, and environmental emissions, thus improving product development and meeting regulatory demands.