1. Calibrate each personal sampling pump with a representative sampler in line.
NOTE: High concentrations of oil mist may plug membrane filters creating unacceptably high pressure drops. If this occurs, terminate sampling.
3. Collect 5 to 10 mL of unused, undiluted mineral oil in a vial. Subm it with samples for standard preparation.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition