Dip Slides are designed to absorb a specific amount of aqueous sample (water or water based) sample into the media contained on each paddle of the Dip Slide. Therefore they are ideal for testing water based liquids.
N.B. If the sample contains any preservative Dip Slides are known to underestimate the number of microbes present. Therefore if testing a water based fluid that contains a preservative a neutralisation step should be conducted prior to testing.