・ The tube is filled with two layers weighing 50 mg and 100 mg of 20-40 mesh activated charcoal, which is highly adsorbent with respect to many nonpolar organic solvents.
・ There are two layers, so breakthrough determinations are possible during measurement.
・ This is compliant with the Japanese Working Environment Measurement Act and NIOSH.
・ The glass tube has been pre-scored to make it easier to cut.