Which piece of equipment is used to sterilize equipment and media?
autoclave
laminar flow hood
spectrophotometer
The correct answer and explanation is:
The correct answer is autoclave.
An autoclave is a piece of equipment used to sterilize instruments, media, and other materials in laboratories or medical settings. It uses steam under pressure to kill microorganisms, including bacteria, viruses, and fungi. The high pressure and temperature (usually around 121°C or 250°F) ensure that even the most resistant organisms, such as bacterial spores, are destroyed.
The process involves placing items into the autoclave chamber, sealing the door, and setting the temperature and pressure for a specific amount of time. The duration of the sterilization cycle typically ranges from 15 to 30 minutes, depending on the volume and type of material being sterilized. After the cycle is complete, the autoclave releases pressure, and the sterilized materials can be safely removed.
Autoclaves are commonly used in microbiology, healthcare, and research environments to sterilize items like surgical tools, petri dishes, glassware, and culture media. They are highly effective because the steam’s high temperature penetrates the materials and destroys any living organisms.
In contrast, a laminar flow hood is used to create a clean, sterile workspace by using a filtered airflow to protect against contamination, but it does not sterilize items. A spectrophotometer is used to measure the intensity of light absorbed by a sample, often for analyzing concentration in chemical or biological experiments, but it does not have any sterilizing function.
Autoclaving is one of the most reliable and widely used methods for sterilization in various fields, ensuring that materials and instruments are free from harmful microorganisms before use.