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TGA/FTIR Accessory

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Description

TGA/FTIR Accessory – Identification and Quantification of Evolved Gases from Thermogravimetric Analyzer

The PIKE Technologies TGA/FTIR Accessory is designed to be an interface for evolved gas analysis from a thermogravimetric analyzer (TGA) to your FTIR spectrometer. Evolved gases from the TGA pass through a heated transfer line into the beam conforming flow cell in the FTIR sample compartment. As these evolved gases travel through the flow cell, FTIR spectra are collected and stored for further processing. Qualitative and quantitative measurements are doable from sample masses – typically in the low milligram range. The PIKE TGA/FTIR Accessory is compatible with most FTIR spectrometers and most TGA instruments.

TGA/FTIR Data for Cured Rubber Sample. Upper trace is the Gram- Schmidt Reconstruct of the TGA evolved gases. Lower trace is a carbonyl reconstruction and a FTIR spectrum from this data set.

During the TGA analysis sample mass is lost through a combination of volatilization and degradation of the sample material. The heated TGA/FTIR system maintains the vapor state of the evolved gases throughout the FTIR analysis.
The FTIR spectrometer is set to collect spectra at 10 second intervals during the evolved gas analysis using the kinetics software package for your FTIR. With this software you can generate reconstructions of total IR response vs. time or temperature (Gram-Schmidt) or specific IR band reconstructions to isolate points of unique component evolutions. FTIR spectra are extracted from the data set and an identification is made by comparing these unknown spectra to vapor phase spectral libraries.

IR Beam Conforming Optical Design of PIKE Technologies TGA/FTIR Accessory

  • IR beam conforming flow cell design – maximizes IR throughput
  • 100 mm IR beam pathlength for maximized FTIR sensitivity
  • Baseplate mounted in your FTIR for flexible sampling
  • Temperature control settable up to 300 degC for flow cell and transfer line
  • User changeable IR transparent windows to minimize cost of operation
  • Heated, glass lined stainless steel transfer line for inert transfer of TGA effluent
  • Purge tubes provide stable purge environment for the FTIR system
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