What is the unit ml/g/um in mercury porosimetery?

[Salish99]

One of the outputs of mercury porosimetry is Differential intrusion in ml/g/um.
this is ml of Hg per g of sample per um of what?
What is that micrometer? The characteristic length of the sample, the average pore diameter or radius?.

Also, why is there a "log differential intrusion", for which the unit is ml/g. The um have vanished but what has been log-ed?

Thx.

 

[Salish99]

anybody?

 

[oswaler]

Mercury porosimetry is a common technique used in material science and geology to measure the pore size distribution and porosity of a sample. The unit ml/g/um refers to the amount of mercury (ml) per gram (g) of sample per micrometer (um) of characteristic length. The characteristic length can refer to the average pore diameter or radius of the sample.

The "log differential intrusion" refers to the logarithmic scale used to represent the differential intrusion volume, which is the difference between the volume of mercury in the sample before and after intrusion. This scale is used because the range of pore sizes and volumes can vary greatly, and a logarithmic scale allows for a more accurate representation of these variations. The units ml/g still refer to the amount of mercury per gram of sample. The um have not vanished, they are still represented in the characteristic length.

In summary, the unit ml/g/um in mercury porosimetry refers to the amount of mercury per gram of sample per micrometer of characteristic length, and the "log differential intrusion" represents the logarithmic scale used to accurately measure the differential intrusion volume.