Compact Dry EC


Compact Dry is a simple and safe procedure for determining and quantifying microorganisms in food, cosmetics and other raw materials, including pharmaceuticals. The ready-to-use Compact Dry chromogenic plates are suitable for both in-process and final product controls.

Coliforms are characterized by being gram-negative bacilli that do not form spores, defined by their ability to ferment lactose. spore-forming, defined by their ability to ferment lactose, to produce acid and/or carbon dioxide gas. The enzyme in charge of degrading lactose is the β-galactosidasa and all bacteria of the coliform group possess it. On the other hand Escherichia coli has an extra enzyme called β-glucoronidasa. Compact Dry EC is capable of detecting the enzyme β-galactosidasa of the coliforms and the enzyme β-glucoronidasa de E. coli of the coliforms and the enzyme

Matrix: Raw materials, finished products, environmental samples from the food, cosmetics and pharmaceutical industries, among others.
Incubation time and temperature: Incubate at 35 ± 2 °C for 24 ± 2 hours with AOAC and 37 ± 1 °C for 24 ± 2 hours with NordVal and MicroVal.
Presentation: Packs of 4 units
Mode of use:
  1. Remove the cover.
  2. Deposit 1 ml of the sample in the center of the surface of the Compact Dry plate.
  3. The sample is automatically and homogeneously dispersed on the film and transforms the dry film into a gel in a few seconds.
  4. Replace the cover on the plate. Incubate for the prescribed time.
Weigh the sample
Add the diluent
Homogenize the sample
Removing the plates
Remove the cover
Add 1 Ml of sample
Wait for the sample to be absorbed
Put the plate down
Bring the plate in incubation
Perform reading
Interpretation of results:

El medio contiene dos tipos de sustrato de enzima cromogénica, Magenta-GAL y XGLUC. Las colonias de coliformes son de color rojo / rosa, excepto las colonias de E. coli, que genera una coloración azul / azul púrpura. El número total de grupos de coliformes es el número total de colonias combinadas de rojo y azul.

Storage and shelf life:

Keep at room temperature, from 1 to 30 °C. Shelf life 18 months.