Graphite powder is insoluble in water,dry and wet sampling dispersion are all okay, Generally, due to the low cost of wet laser particle size analyzer, wet sampling system is recommended.
When test graphite powder, need cleanser essence or Polyoxyethylene Sorbitan Fatty Acid Esters as dispersant, ultrasonic time need 1 minute, the main purpose is to make the sample fully dispersed, with water as the dispersion medium, Stable and precise particle size distribution could be got then.
Graphite powder are mainly used as battery materials, the average particle size is 16-18 micron, winner2000E and 2000ZDE laser particle size analyzer can meet the test requirements.