· AATCC 174
Scope: This test method is designed to determine the antimicrobial actiity of new carpet materials and consists of three procedures:
We perform the antibacterial parts, not the antifungal.
Part I. Qualitative: Single Streak Method
This is similar to AATCC147 ( parallel streak method); the difference is that this is a single streak across the sterile plate. Both pile (face fibers) and the backing samples are done on separate plates. As with AATCC147 the withd of the zone of inhibition is determined after 24hr incubation.
Part II. Quantitative Assessment
This part is similar to AATCC100. Test and control swatches are inoculated with the test organisms. After 24h incubation the bacteria are eluted from the swatches by shaking in known amounts of neutralizing solution. The number of bacteria present in this liquid is determined and the percentage reduction of the treated specimen is calculated.
In the absence of a control swatch the number of bacteria is determined between samples incubated at 0 hrs and 24 hrs.