heating under Nitrogen flow min. 1 h at 60°C (depends on sample)

Physically to fit into the sample cell: grains < 2mm,
The small cell has a volume of 2 cm³, the large one in picture above has 10 cm³. Assuming a powder sample takes about 50% of the volume:
max. about 2.5 grams (of sediment, density 2.7g/m³) in normal cell / max. 12.5 grams in large cell.
cube-shaped grains without any porosity or surface structure should be less than 25µm of sediment if you use the normal cell and less than 125µm when you use the big cell. Realistically grain size might be about a factor 2 larger (thus 50 / 250 µm) due to irregular shapes, surface structure and/or porosity.
see quick specific area estimate below: small cell: 2.5 *6 / (2.7*25) or large cell: 12.5 * 6 / (2.7 * 125) = 0.22 m² absolute surface area in cell

simulation of desorption peak by injection of appropiate amount of nitrogen into N/He gas stream

0.2 m² absolute surface ( i.e. 5 grams of sediment material with a specific surface of 0.04 m²/g or
0.1 gram of a material with a specific surface of 2 m²/g)

1 sample

6 hours

simple grain size to specific surface conversion for cube-shaped particles
A = m * 6/(d*rho)
A - specific surface in m²/g
m - sample mass in g
d - grain size in µm
rho - density in g/cm³

Amount of powder that fits into cell assuming powder occupies half the volume
m = 0.5 * V * rho
V - sample cell volume in cm³:  2 cm³ for small cell, 10 cm³ for large cell

 07Mar23,.