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The Tristar 3000 is an instrument to measure specific surface area and pore size distribution of porous materials by means of adsorbing a probe gas at liquid nitrogen temperature. (Adsorption isotherms). As probe gases nitrogen and argon are available.
The instrument is best suited for mesoporous samples (pore size between 4-50 nm) and surface areas above 3 m2/g.

For samples with extremely low surface area < 1m2/g Krypton should be used as probe gas. This is possible at the new 3FLEX instrument and at the ASAP2020 both in the same laboratory.

The samples need to be absolutely dry before they can be measured.
Two options for sample drying are available:

1) drying in a flow of dry nitrogen at the SmartPrep (up to 400 °C)
2) drying in vacuum at the new SmartVacPrep drying station up to 450 °C