ROTI®Plate90 DG18

Sterile ready-to-use culture media plates for microbiological analysis.

ROTI^®Plate90 are prepared culture media plates with a diameter of 90 mm. They are thus adapted to the size of membrane filters for assaying of low-germ fluids by membrane filtration method. They are also applicable for the microbiological analysis of samples in general.

The germs of expected low-germ liquid samples are concentrated by membrane filtration. Afterwards, the membrane is placed on top of the medium and incubated. Using a membrane with a grid helps counting the resulting colonies.
Our products are tested and approved exclusively for research and development.

Samples which are expected to have a higher microbiological burden are prepared in a serial dilution. Afterwards, every dilution step is plated and incubated. The number of grown colonies is noted as result.

Dichloran-Glycerin Agar (DG18) is a selective agar for counting yeasts and food moulds, especially from semi-dry and dry foods.
It is recommended for the enumeration and isolation of xerophilic molds from dried and semi-dried foods such as fruit, spices, cereals, nuts, meat and fish products.
The addition of dichlorane, the reduction of water content by the addition of glycerol and the low pH inhibit bacterial growth.