| 释义 |
impinger|ɪmˈpɪndʒə(r)|
[f. impinge v. + -er1.]
Any of various instruments for collecting samples of the particles suspended in air (or another gas), this being either drawn into a liquid or directed in a jet against a flat surface so that some particles are deposited.
1922Rep. Investigations U.S. Bureau of Mines No. 2392. 3 The analytical procedure necessary when using this new impinger-bubbler apparatus is almost identical with that employed with the Palmer apparatus. 1932Jrnl. Industr. Hygiene & Toxicol. XIV. 301/1 The Greenburg-Smith impinger was introduced in 1922. 1936Drinker & Hatch Industr. Dust vii. 116 The impinger flasks, stoppers, etc., should be washed..in..the sampling fluid. 1945[see impactor 2]. 1972Blakeslee & Reckner in R. D. Ross Air Pollution & Industry v. 270 Dry impingers are capable of depositing particles in distinct size ranges on surfaces such as microscope slides. Several units are connected in series, each containing an orifice which is aimed at the surface. |