Gas-pak

Gas-Pak System

A typical Gas-Pak system used in microbiology laboratories.

The Gas-Pak system is a widely used method in microbiology for creating an anaerobic environment in a laboratory setting. This system is essential for the cultivation of anaerobic bacteria, which require environments devoid of oxygen to grow.

Principle

The Gas-Pak system operates by generating hydrogen and carbon dioxide gases when water is added to a chemical sachet. The hydrogen gas reacts with oxygen present in the jar to form water, thereby reducing the oxygen concentration and creating an anaerobic environment. The carbon dioxide produced helps to promote the growth of anaerobic bacteria by providing a suitable atmosphere.

Components

The Gas-Pak system typically consists of the following components:

• Anaerobic jar: A sealed container where the culture plates are placed.
• Gas-Pak sachet: A chemical packet that, when activated with water, releases hydrogen and carbon dioxide gases.
• Palladium catalyst: A catalyst that facilitates the reaction between hydrogen and oxygen to form water.
• Indicator strip: A strip that changes color to indicate the presence or absence of oxygen.

Procedure

1. Preparation: Place the culture plates inside the anaerobic jar. 2. Activation: Add water to the Gas-Pak sachet to initiate the chemical reaction. 3. Sealing: Close the jar tightly to ensure no external air enters. 4. Incubation: Place the jar in an incubator at the desired temperature for bacterial growth. 5. Observation: After the incubation period, check the indicator strip to confirm the absence of oxygen and examine the culture plates for bacterial growth.

Applications

The Gas-Pak system is used in various applications, including:

• Cultivation of anaerobic bacteria such as Clostridium and Bacteroides.
• Clinical diagnostics to identify anaerobic pathogens.
• Research studies involving anaerobic microbial processes.

Related Pages

• Anaerobic bacteria
• Microbiology
• Culture media
• Anaerobic respiration