B220 

LAURYL TRYPTOSE BROTH ( LAURYL SULPHATE BROTH )

Formula

Ingredients 

gms/lit.

Tryptose

Lactose 

Sodium chloride 

Dipotassium phosphate

Monopotassium phosphate 

Sodium lauryl sulphate 

20.00

5.00

5.00

 2.75

2.75

0.10

Final pH (at 25°C) : 6.8 + 0.2

Directions 

Dissolve 35.6 gms. in 1000 ml. distilled water. Distribute into tubes containing inverted Durham’s tubes. Sterilize by autoclaving at 15 lbs pressure (121°C) for 15 minutes.

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