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Scan RDI™ Microbial Detection
The Scan RDI™ is an automated system that directly distinguishes individual cells without requiring a time-consuming growth stage. It utilizes a four-step protocol. The first step is membrane filtration through a 25mm membrane. The second step includes cell labeling with a fluorescent dye. During the third step, the membrane is placed in the Scan RDI™ instrument and is scanned with a laser. Within three minutes, all viable microorganisms are detected and counted. The fourth step is visual confirmation of the microorganisms with a fluorescent microscope.
Eagle Analytical Services only permits degreed personnel properly trained in microbiology to perform the procedures for the Scan RDI™ in our certified Class 100 biological safety cabinet, located in our certified Class 100 clean room. The Scan RDI™ test procedure is a very exacting procedure, where asepsis of the procedure must be ensured for a correct interpretation of the results. For more information about our Scan RDI™ please refer to the list of articles below. 1. Validation
of the Scan RDI for Routine Microbiological Analysis of Process Water |
The Chemunex Scan
RDI™ is a state of the art instrument that allows microbial cell counts in less
than one day. It combines speed with sensitivity to allow direct counts of
bacteria and fungi down to one colony-forming unit. Eagle Analytical Services
is very proud to have this exclusive piece of equipment in their laboratory.
There are less than 100 Scan RDIs™ in the United States.
The Scan RDI™ does have its limits. Only aqueous samples can be filtered
through the 25mm membrane. On the other hand, the speed of the test allows the
compounding pharmacist to know in a few days, rather than fourteen (14) days,
if their samples are grossly contaminated. This allows remedial action to be
taken immediately, without waiting for a USP <71> sterility test.
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