When the target concentration of the analyte is exceptionally higher than these limits, they may not be attainable at the routine operating parameters. This value is determined by the slope of the calibration curve. The sensitivity will vary with the particular instrument and integration method used for the analysis. The sampling instruments are small and portable. Multiple injections of each sample are possible.
Samples are stable for at least two weeks.
The precision of the sampling pump is dependent on the pressure drop across the charcoal tube. High relative humidity decreases the capacity the of charcoal tube for vinylidene chloride vapors. Charcoal will adsorb many organic vapors, so vapors present other than those requested for analysis should be listed as interferences. Sampling Procedure 2.1. For this evaluation, lot 107 charcoal tubes supplied by SKC, Inc. were used.