Spectroscopy & Surface Characterization
BET Surface Area Analyzer – Micromeritics TriStar 3000
The Micromeritics TriStar 3000 measures the specific surface area (BET) and porosity of powders and porous solids by nitrogen adsorption at liquid-nitrogen temperature (77 K). It analyses up to three samples at once. A VacPrep 061 degas station next to it cleans samples under vacuum and heat before analysis. Typical materials include catalysts, minerals and geomaterials, ceramics, metal powders, carbon materials, pharmaceutical powders and adsorbents. The results support research, product development and quality control.
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08:00:00 - 16:00:00
Specifications
Analysis ports: 3 samples analysed at the same time, plus a dedicated Po tube for saturation pressure
Adsorptive: nitrogen (N₂ 5.0) at 77 K; helium (He 5.6) for free-space measurement
Methods: single- and multipoint BET, Langmuir, full adsorption/desorption isotherms, t-plot, BJH pore size distribution (adsorption and desorption), total pore volume
Pore size range: approx. 3–300 nm (mesopores), with a limited indication of micropores
Sample tubes: 3/8" (9.5 mm) with isothermal jacket
Sample amount: typically 0.1–1 g, depending on surface area
Sample preparation: VacPrep 061 degas station, 6 stations, vacuum and heating (routinely 200 °C), N₂ backfill after degassing
Analysis time: about 1.5 h for a 5-point BET
Output: isotherm and BET summary reports, export to Excel or PDF
Sample requirements: dry powder or small particles that tolerate vacuum and the degas temperature