About Instrument and its Applications:
Brunauer-Emmett-Teller (BET) surface area analysis is the multi-point measurement of an analyte’s specific surface area (m2/g) through gas adsorption analysis, where an inert gas such as nitrogen is continuously flowed over a solid sample, or the solid sample is suspended in a defined gaseous volume.
Small gas molecules adsorb to the solid substrate and its porous structures due to weak van der Waals forces, forming a monolayer of adsorbed gas. This monomolecular layer, and the rate of adsorption, can be used to calculate the specific surface area of a solid sample and its porous geometry, informing studies into the reactivity and bioavailability of pharmaceutical products.
General Information-
Make - Quantachrome
Model –Autosorb iQ-x
Year of Installation - 2013
Specifications-
0.1/1 torr transducer accuracy (XR): <0.15% of reading*
Ultimate vacuum, analysis (XR): 5x10-10 mbar‡
P/Po range (XR): <1 x 10-8 – 0.999
Pore Size range: 0.35 to 500 nm (3.5 to 5000 Å)
Ultimate vacuum, degas (XR) 5x10-10 mbar‡
Chemisorption furnace, Max temperature: 1100°C
Degassing temperature: RT to 350°C (450°C with quartz glassware)
Available Gas Modes: Nitrogen, Co2
Measurement Modes:
1) Physisorption
2) Chemisorption
Sample Requirements-
Powder Samples- Approx. 200mg (Fully Dry)