A dispenser capable of delivering 1.0 mL to prepare standards and samples. If a dispenser is not available, a 1-mL pipet may be used. Carbon disulfide, reagent grade. GC grade nitrogen, air, and hydrogen. Standard preparation 3.3.1.
Analytical standards are prepared in carbon disulfide.
Standard concentrations should bracket sample concentrations. Thus, if samples fall out of the concentration range of prepared standards, additional standards may have to be prepared and analyzed to ascertain linearity of response. Sample preparation 3.4.1. Transfer each XAD-4 section of the samples to separate vials. The glass tube and plugs are discarded.