Determination of MIlk Density (Specific Gravity) of a Milk sample_A Complete Procedure (FAO)

Summary

This instructional video demonstrates the process of determining milk density using a lactometer. The steps include sample preparation, temperature measurement, lactometer reading, and calculation. Key tools are a lactometer, measuring cylinder, and thermometer. The video guides viewers through filling a cylinder, measuring the sample's temperature, observing the lactometer's reading, and calculating the milk's density. The final density is determined to be 1.0284 grams per ml, adjusting for temperature differences.

Takeaways

• 🧪 The video demonstrates how to determine milk density using a lactometer.
• 📝 The steps for the test include sample preparation, thermometer reading, lactometer reading, and calculation.
• 🛠️ Essential tools for the test are a lactometer, measuring cylinder, and thermometer.
• 💧 A 50 ml measuring cylinder is used to take the milk sample.
• 🌡️ The temperature of the sample is measured using a calibrated thermometer.
• 📊 The sample's temperature in this case was found to be 27 degrees Celsius.
• 🧭 The lactometer is immersed in the milk sample and allowed to float freely.
• 🔍 The lactometer reading is taken just above the surface of the milk, which was 27 degrees in the example.
• ✂️ The lactometer is rotated to clearly see the scale for accurate reading.
• ⚖️ The density calculation involves correcting the lactometer reading for the sample's temperature.
• 🔢 The corrected temperature is calculated by subtracting the standard temperature (20°C) from the sample temperature (27°C).
• 📐 A temperature factor of 0.2 is used in the calculation process.
• 📈 The final calculation reveals the milk sample's density or specific gravity as 1.0284 grams per ml.

Q & A

What is the main topic of the video?

The main topic of the video is the procedure for determining the density of milk using a lactometer.

What are the essential tools required to conduct the milk density test?

The essential tools required for the test are a lactometer, a measuring cylinder, and a thermometer.

How much milk sample is needed for the test?

A 50 ml measuring cylinder is used to fill the milk sample for the test.

What is the first step in the procedure after preparing the sample?

The first step after preparing the sample is to insert a calibrated thermometer into the sample to measure its temperature.

What was the temperature of the milk sample measured in the video?

The temperature of the milk sample was measured to be 27 degrees Celsius.

How should the lactometer be used in the test?

The lactometer should be silked down into the milk sample and allowed to float freely to obtain a reading.

What is the lactometer reading observed in the video?

The lactometer reading observed in the video was 27 degrees.

What is the standard temperature used for the calculation of milk density?

The standard temperature used for the calculation is 20 degrees Celsius.

What is the temperature factor used in the calculation?

The temperature factor used in the calculation is 0.2.

How is the corrected temperature obtained for the density calculation?

The corrected temperature is obtained by subtracting the standard temperature from the sample temperature.

What is the calculated density or specific gravity of the milk sample in the video?

The calculated density or specific gravity of the milk sample is 1.0284 grams per ml.