|Product Code||Description||Product Size||Quantity|
|CM0906B||R2A Agar 500g||–||500g|
R2A Agar 500g
Thermo ScientificTM OxoidTM
Enumerate heterotrophic bacteria from drinking water samples with Thermo Scientific™ Oxoid™ R2A Agar (Dehydrated). This nutritionally reduced medium was specially designed to enhance the recovery of stressed and chlorine damaged bacteria from treated water samples. Stressed or injured organisms during water treatment are unable to grow on high nutrient media since faster-growing organisms outgrow the former. Therefore the use of a low nutrient medium like R2A Agar incubated for longer incubation periods allows these stressed organisms to grow well.
R2A Agar, Oxoid Composition
|pH 7.2 ± 0.2 @ 25°C|
R2A Agar, Oxoid Preparation:
Suspend 18.1g in 1 litre of distilled water. Bring to the boil to dissolve completely. Sterilise by autoclaving at 121°C for 15 minutes. Mix well and pour into sterile Petri dishes.
Storage conditions and Shelf life
R2A Agar should be stored tightly capped in the original container at 10-30°C. When stored as directed the medium will remain stable until the expiry date printed on the label.
The prepared medium may be stored for up to 2 weeks at 2-8°C.