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FOOD AND DRUGS ACTS. 1938 - 1950.
MILK (SPECIAL DESIGNATION) (PASTEURISED & STERILISED MILK)
REGULATIONS. 1949/l950.
MILK (SPECIAL DESIGNATION) (RAW MILK) REGULATIONS. 1949/1950.
Bacteriological Examination of Milk:
The tests prescribed for Pasteurised Milk are:-
(a) The Phosphatase test for efficient heat-treatment which is
satisfied by milk which gives a reading of 2.3 Lovibond
blue units or less, and
(b) the Methylene blue test for keeping quality which is
fied by milk which fails to decolorise Methylene blue in
thirty minutes.
The Turbidity test is prescribed for Sterilised Milk, the presence of
any signs of turbidity indicating that the milk has not been heated to
sterilisation temperature.
During 1952, 104 samples of milk were purchased by the Sampling
Officer and submitted to the appropriate tests. Of these, 24. were taken
at the early morning delivery to the hospitals in the Borough and 14 were
taken at schools under the control of the London County Council.