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Phenol Red Carbohydrate Broth
(BAM M121)

山東拓普生物工程有限公司 培養(yǎng)基配方 http://xhztyn.cn

Composition per liter:

Pancreatic digest of casein..........................................................10.0g
NaCl..............................................................................................5.0g
Beef extract...................................................................................1.0g
Carbohydrate solution............................................................200.0mL
Phenol Red solution...................................................................7.2mL
pH 7.4 ± 0.2 at 25°C
Source:  This medium is available as a premixed powder from BD Di-
agnostics.
Phenol Red Solution:
Composition per 10.0mL:
Phenol Red................................................................................0.025g
Preparation of Phenol Red Solution: Add Phenol Red to dis-
tilled/deionized water and bring volume to 10.0mL. Mix thoroughly.
Carbohydrate Solution:
Composition per 200.0mL:
Carbohydrate........................................................................5.0–10.0g
Preparation of Carbohydrate Solution: Add carbohydrate (5.0g
dulcitol, 10.0g lactose, or 10.0g sucrose) to distilled/deionized water
and bring volume to 200.0mL. Mix thoroughly. Filter sterilize.
Preparation of Medium: Add components, except carbohydrate so-
lution, to distilled/deionized water and bring volume to 800.0mL. Mix
thoroughly. Adjust pH to 7.4 if necessary. Distribute into tubes contain-
ing an inverted Durham tube. Fill each tube with 8.0mL of medium. Au-
toclave for 15 min at 13 psi pressure–118°C. Cool to 45°–50°C.
Aseptically add 2.0mL of sterile carbohydrate solution to each tube.
Use: For the determination of fermentation reactions in the differenti-
ation of microorganisms, such as Salmonella spp. Fermentation is de-
termined by the production of acid—broth turns yellow—and
formation of gas—bubble trapped in Durham tube.