THE EFFICIENCY OF VARIOUS LIQUID IMPINGER SAMPLERS IN BACTERIAL AEROSOLS

Journal/Book: Brit. J. industr. Med. 1957 14 287. 1957;

Abstract: From the Microbiological Research Establishment (Ministry of Supply) Porton Wiltshire England RECEIVED FOR PUBLICATION FEBRUARY 7 1957 Summary The unique features of the liquid impinger as a viable aerosol sampler are described. Sonic velocity impingement is shown to have a lethal effect an the more sensitive types of bacterial cell. Tests an various types of impinger indicated an optimum impingement velocity of roughly 300 m.p.h. Below this figure impingement efficiency for small particles falls off while above it lethal effects start. Three types of impinger are shown to have high efficiency for the organisms used. Other types including one hitherto standard are less satisfactory. We are grateful to Mr. S. Peto for statistical criticism. ___MH

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