Quality control from commercially prepared media includes all of the following except:
a. receipt and verification of storage or transportation conditions.
b. visual inspection for discoloration or con-tamination.
c. pH the media using litmus paper.
d. verification of lot numbers and expiration dates.
C
Commercially manufactured media should not have to be subjected to biochemical analysis such as pH measurements. It is important however to insure proper storage and transportation condi-tions of all media.
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