DEV Nähragar (DEV)
According to DIN 38411
| Shorthand symbol: | DEV |
| Item number: | 40-1128 |
| Format: | Petri Dish, 90mm |
| Colour: | Light yellowish |
| Storage conditions: | Dry, in closed bag at 15 – 22°C. |
| Shelf-life: | 6 Months |
| pH: | 7.3 ± 0.2 at 25°C |
DEV Nutrient Agar is used for the detection, isolation and enumeration of bacteria from food and water. The medium corresponds to the requirements DIN 38411.
| in g per 1 Litre of Nutrient medium | |
|---|---|
| Peptone from flesh, tryptic-digested | 10.0 |
| Beef Extract | 10.0 |
| Sodium Chloride | 5.0 |
| Agar | 10.0 |
| *Adjusted as required to meet performance standards |
The Microbiological Performance Test is carried out in accordance with the requirements ISO 11133:2014.
Productivity
Incubation conditions: 44 ± 4 Hours at 36 ± 1°C; Inoculum concentration: 80–120 CFU
| Organism | Type Strain | Specification | Colony morphology | |
|---|---|---|---|---|
| Escherichia coli | ATCC 8739 / WDCM 00012 | ≥ 70 % | Yellowish/Cream colonies | |
| Bacillus subtilis | ATCC 6633 / WDCM 00003 | ≥ 70 % | Yellowish/Cream colonie |
Microbial Contamination
Incubation conditions: 5–7 days at 20–25°C and 5–7 days at 30–35°C
| Specification |
|---|
| No microbial contamination |