Uji Kadar Air Serbuk Simplisia dengan Destilasi | Sterling Bidwel | #universitassetiabudi

Summary

In this video, the process of testing moisture content using distillation (also known as steam distillation) is explained. The procedure involves preparing a sample, weighing it, and using a round-bottom flask along with a solvent (such as toluene) to extract moisture. The sample is heated until the solvent evaporates and condenses, allowing the water content to be measured. The video covers the steps in detail, including how to calculate the moisture percentage using the collected volume. The process is straightforward and can be repeated for accuracy, making it accessible for viewers interested in performing this test.

Takeaways

• 😀 The video explains the process of moisture content testing using the distillation method.
• 😀 The apparatus for this test includes a round-bottom flask, pipes, and a condenser.
• 😀 A 20-gram sample is weighed before being placed in the round-bottom flask for testing.
• 😀 Solvents like toluene (silent) are used for moisture testing, and other solvents can also be used.
• 😀 Before using the solvent, it is saturated with water to ensure it's ready for the test.
• 😀 The saturation of the solvent is achieved by mixing water (10 ml) and the solvent (100 ml).
• 😀 The process involves heating the sample until it begins to boil, causing the solvent to evaporate.
• 😀 The evaporated solvent is condensed in the condenser and returned to the flask for collection.
• 😀 Water from the sample will eventually be separated and collected in the side pipe, allowing for measurement.
• 😀 After collecting the water, the yield is measured by calculating the percentage of water in the sample.
• 😀 The moisture test is usually repeated three times for accuracy, and the results are used to determine the water content in the sample.

Q & A

What is the main topic of this video?

The video demonstrates the process of testing water content using the distillation method, specifically the 'steering big wheel' technique in a laboratory setup.

What equipment is used in the distillation process?

The equipment includes a round-bottom flask, pipes for water extraction, a condenser, and a scale for measuring the water content.

How much sample is used for the water content test?

A sample weighing 20 grams is used for the test.

What solvent is used in the water content test?

The solvent commonly used is toluene (or 'silent').

What is the purpose of saturating the solvent before use?

The solvent is saturated to ensure it is fully dissolved and in a stable condition before being used in the distillation process.

What is used to saturate the solvent?

Aquades (distilled water) is used to saturate the solvent, with 10 ml of aquades and 100 mg of the other ingredient required for saturation.

What happens when the sample begins to heat up in the distillation process?

As the sample heats up, the solvent evaporates, and the vapor travels through the pipe (similar to a venturi pipe), condensing in the condenser before returning to the flask.

How is the amount of water in the sample measured?

The amount of water is determined by measuring the volume of water collected in the scale-equipped pipe and calculating the yield based on the total sample weight.

How is the water content percentage calculated?

The water content percentage is calculated by dividing the volume of water collected by the weight of the sample, then multiplying by 100.

How many times is the water content test typically repeated?

The water content test is usually performed three times to ensure accuracy and consistency in the results.