User`s guide

Sampling Techniques
340
If a 1 µL injection of standard solution is to be used, the
concentration of the solution must be approximately 25% by
volume. 1 µL of a 25% chloroform solution contains 375 µg
chloroform.
If 375 µg of chloroform had been desorbed from 20 mg of solid
sample, the concentration in the sample would have been
1.875% by weight. Therefore, 1.875 (%) should be entered into
the data handling system as the “calibration amount” and 20
(mg) as the “sample amount”.