IGA Sorp dynamic vapor sorption analyzer

The IGAsorp is a fully automated compact benchtop DVS analyzer, for fast and accurate vapor sorption measurements using the dynamic flow technique for water and organic solvents. Measured vapor uptake isotherms and kinetics are used to characterize, test and evaluate materials in precisely defined environmental conditions. 

An ultra-sensitive microbalance measures changes in sample mass as a function of humidity and temperature. Humidity is determined by relative mixing of wet and dry gas streams, and is measured and regulated at the sample position. These factors combine to offer unrivalled performance and total baseline stability.

BENEFITS OF IGASORP

• Unrivalled performance and total baseline stability
• Proven reliability supported by 3 year warranty
• Fast and accurate analysis of equilibria and kinetics using the IGA method

THE IGA METHOD

Hiden Isochema’s unique IGA method is applied independently to every step in a gravimetric sorption measurement. At each step, the humidity and temperature are actively regulated, with resultant changes in sample weight continuously recorded.

The kinetic weight data is analyzed in real-time, and the trend toward equilibrium is predicted and displayed on screen. Equilibration criteria are applied to objectively determine the period allowed before the measurement moves on to the next pressure or temperature value. Each equilibrium point is plotted on an isotherm or isohume, and the full raw data is also recorded.

The IGAsorp therefore allows consistent analysis with optimum measurement accuracy and faster overall process times.

APPLICATIONS

IGAsorp dynamic vapor sorption analyzers are used in hundreds of R&D and process laboratories and are equally popular in both academic and industrial sectors. Key areas include:

• Pharmaceutical
• Biotech
• Polymers and packaging
• Natural materials
• Building and construction materials (cement, timber, insulation, adhesives)
• Electronics
• Fuel cells (proton exchange membranes)

DVS applications include:

• Quality control
• Hydrophobicity, product stability and shelf life
• Water activity and water content determination
• Polymorphism: amorphous phase detection and quantification
• Diffusion and permeation including vapor transmission rate (MVTR/WVTR) analysis

APPLICATION DATA

• Amorphous phase detection

A simple test to detect amorphous phase transition

• Permeation study

MVTR results from a polmer film

• Kinetics analysis

Example of an isothermal kinetic response data

• Isotherm analysis

Comparison between isotherms at course and medium resolution

• Hydrate analysis

Example of a hydration-dehydration cycle

• Diffusion study

Variation of the microscopic diffusion coefficient with relative humidity