Lab exam of sheep milk

Question 1

Sensory evaluation:

Answer 1

Color: white or yellowish
Consistency: homogenous, liquid, without sediment, floccule or dirt
Flavour and odour: without strong smelling materials

Question 2

Flow diagram:

Answer 2

Same as cow

Question 3

Methods:

Answer 3

Phosphatase test: detect inadequate pasteurization
Storch test: peroxidase activity, peroxidase is inactivated at 75-80*C

Question 4

Defects:

Answer 4

Off flavour
Rancidity - lipid oxidation
Contamination
Abnormal colour - diet related
Texture irregularities - processing problems
Microbial pathogens