Question

Is not a platform test?

• A. Sediment test
• B. Turbidity test
• C. Alcohol test
• D. Smell and colour

Hint:

Platform tests are for raw milk and must be QUICK. Think: can this be done in a minute or two on a busy receiving dock? Sensory tests, alcohol test, COB test, and sediment test fit this description. Tests for pasteurization (phosphatase) or sterilization (turbidity) are done in the lab on the finished product.

Answer 1

The Correct Option is B

Step 1: Concept Overview:
A "platform test" is a quick test at milk reception to evaluate raw milk quality for acceptance/rejection decisions. These tests must be simple and fast.
Step 2: Option Analysis:
Analyzing the options provided:
(A) Sediment test: A rapid platform test involving filtering a standard milk volume through a cotton disc to visually detect insoluble dirt and foreign particles.
(B) Turbidity test: Used to assess the effectiveness of sterilization by detecting denatured whey proteins. A reagent added to a properly sterilized sample will not cause turbidity. This is a laboratory test for processed milk, not a rapid platform test for raw milk.
(C) Alcohol test: A rapid platform test mixing equal parts alcohol (typically 68-72% ethanol) and milk. Coagulation indicates high acidity or salt imbalance, making the milk unsuitable for heat processing.
(D) Smell and colour: Part of the organoleptic/sensory evaluation, serving as the initial and most basic platform test performed by the milk grader.
Step 3: Conclusion:
The Turbidity test, designed for sterilized milk, is not a platform test used at raw milk reception.