courtesy of Surface Measurement Systems

Dynamic Vapor Sorption (DVS) instruments and Inverse Gas Chromatography Surface Energy Analyzer (iGC-SEA) can be used for the determination of BET surface areas. Both instruments can carry out experiments at room temperature and need very small sample amounts (typically a few milligrams for the DVS). This compares to the traditional nitrogen BET method, which requires very low experimental temperatures and sample sizes of typically one gram. Some samples may change their morphology at low temperatures. While this is an issue for traditional BET methods, this is no problem using iGC or DVS because they test at room temperature.

 Dynamic Vapor Sorption (DVS) instruments and Inverse Gas Chromatography Surface Energy Analyzer (iGC-SEA) can be used for the determination of BET surface areas. Both instruments can carry out experiments at room conditions and need very small sample amounts (typically a few milligrams for the DVS). This compares to the traditional nitrogen BET method, which requires very low experimental temperatures and sample sizes of typically one gram. Some samples may change their morphology at low temperatures. While this is an issue for traditional BET methods, this ceases to cause any issues using iGC or DVS because they test at room temperature.

Notes:

Application Note 18: Measuring BET Surface Areas using Organic Probe Molecules | Request a copy

Application Note 225: Isotherm Measurements for BET Surface Area Calculations using Inverse Gas Chromatography | Request a copy