2017 Milk Testing Flashcards
The bacterial content of milk is used to monitor what?
milk quality
What type of carton is used to prevent an oxidized flavor in milk?
pigmented
The phophatase test is used to determine if what two liquids have been mixed together?
raw and pasteurized milk
What off-flavor in milk results from the presence of a large number of bacteria in milk?
sour
What two types of light can cause an oxidized flavor?
sunlight and fluorescent light
When lipase breaks down butterfat, it leads to what off-flavor in milk?
rancidity
What is the main reason antibiotics are not allowed in milk for human consumption?
Some people are allergic to antibiotics
The standard plate count is a test that measures what?
the bacterial content of milk
Name 4 off-flavors in milk.
acid, bitter, cooked, feed, fermented, foreign, fruity, lacks freshness, oxidized, rancid, salty, sour
What enzyme breaks down butterfat?
lipase
Why is a cryoscope used?
to test raw milk to be sure water was not added to it
List 3 reasons antibiotic residues are not allowed in milk for human consumption?
some people are allergic to antibiotics. milk with antibiotic residues is not good for cheesemaking, bacteria may become resistant to antibiotics, antibitotics are not a natural part of milk
A surface made of what metal can give milk an oxidized flavor?
copper
Off-flavors in milk are most commonly found in what milk component?
butterfat
What instrument is used to test the freezing point of milk?
cryoscope
