The sampling system was made up of a cylindrical adsorbing cartridge housed coaxially inside a cylindrical diffusive body of polycarbonate and microporous polyethylene
Each cartridge consisted of a cylindrical adsorbing cartridge which was a stainless steel net cylinder, with 100 mesh. It had an external diameter of 4.8 mm, containing 350 mg of Carbograph 4 (35e50 mesh).
with 100 mesh
Carbograph