Process for the selective determination of oil mist or aerosols

摘要

An automated analysis method for an impactor used as a measuring transducer for the selective determination of oil mist or aerosols. The process includes the steps of rotating the deflector plate (5) of the measuring transducer (1) about the symmetry axis thereof and of determining the quantity of oil deposited by means of an optical analyzing device from the extinction of a light beam reflected from deflector plate (5) due to the alternation between the background and the pattern produced by the micronozzles (4).

主权项

1. A process for the selective determination of a quantity of oil mist or a quantity of aerosols in a gas sample, the process comprising the steps of:
providing a device, which has an impactor as a measuring transducer, which has micronozzles for dispensing a predetermined test gas flow and which has a deflector plate downstream of the micronozzles for depositing a non-rotationally symmetrical pattern of aerosol or oil particles on said deflector plate; providing an optical analyzing device; dispensing the predetermined test gas flow to deposit the non-rotationally symmetrical pattern of aerosol or oil particles on the deflector plate; rotating the deflector plate relative to the optical analyzing device, about a symmetry axis of the measuring transducer; determining a quantity of oil deposited by means of the optical analyzing device from an absorbence of a light beam reflected from the deflector plate due to an alternation between gray values of the background and of the pattern.