Semiautomated ring carrier to facilitate and expedite disinfectant testing by the AOAC use-dilution method

The AOAC use-dilution test requires the replicate examination of a number of contaminated metal rings. Ten metal rings may be tested within the 20 min structure of the test. From a statistical and economical viewpoint, it would be highly desirable to increase the number of rings examined in a single test. A semiautomated ring carrier permits testing 200 rings within a 20 min test.