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Questions and Answers
How should objects to be weighed be handled according to the text?
What should never be exceeded when using an analytical balance?
What is the purpose of a centrifuge chamber as described in the text?
What is one key advantage of using electronic balances compared to mechanical balances?
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How does an autoclave operate according to the text?
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Why is it important to keep a balance clean according to the text?
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What is the main component of an autoclave?
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What is the purpose of the wire basket in an autoclave?
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What does TOT stand for in the context of sterilization?
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How does increasing the temperature affect the Thermal Death Time (TOT)?
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What is the role of the Basket Support in an autoclave?
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Who designed the gas analyzer known as the Clark Cell?
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Study Notes
Analytical Balance
- Never exceed the maximum load capacity of the balance
- Keep the balance clean and free from dust
- Objects to be weighed should not be handled with bare hands
- Chemical objects should not be placed directly on the pan, and liquids should be in a closed vessel or bottle
Centrifuge Chambers
- Used for separating particles from a solution based on shape, density, and size
- Each chamber has a double pom analytical balance
Single Pan Analytical Balance
- Uses a standard procedure of putting a counter weight on an immovable horizontal path
- Provides a convenient way of measuring weight
Electronic Balance
- Two types: load type and electromagnetic type
- Provides convenience and freedom from mechanical failure
- Reduces sensitivity and provides high accuracy
Autoclave
- Uses high-pressure steam to sterilize equipment
- Operates by using steam to reach high temperatures, killing microorganisms
- Time required to kill microorganisms is referred to as thermal death time (TOT)
- Autoclave operates on a time-temperature relationship, where increasing temperature decreases TOT
- Components of an autoclave include a boiler, wire basket, and basket support
Blood POâ‚‚ Measurement
- Measures the partial pressure of oxygen in blood
- Uses a polarographic method with a platinum electrode
- Operates by reducing oxygen in the blood, which generates a voltage signal
- Voltage range observed is between 0.6 and 10 polarization voltage
- Designed by Clark, a scientist
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Description
Test your knowledge on the care and use of an analytical balance. Questions cover topics such as maximum load, cleanliness, handling of objects, and proper storage of materials.
