Laboratory digesters are used to break down samples into their basic constituents for analysis. The constituents so derived are mainly used for further studies and research. These digesters are often required for analyzing trace metals, atomic absorption or inductively coupled plasma spectroscopy.


Types of Digesters

• Acid Digesters: These equipment digest a sample under high pressure and temperature, making use of conventional acids including hydrochloric and nitric acid.
• Microwave Digesters: These equipment heat microwave-absorbing reagents containing a sample inside a pressurized container.

Working Process
These digesters are generally of a batch-type design. Organic sample material is placed in the equipment and allowed to digest. On completion of the process, the effluent is removed and the process is repeated. The retention time of the substance/sample depends on the temperature, pressure and other factors. Use of a fume hood is helpful to remove gases produced by the digestion process.

Methods used
The processing of the organic samples can be done by:

• Open Flask Digestion: The reaction or processing of the smaple takes place in an open container at low pressure. This method is more commonly used.
• Closed Flask Digestion: The reaction or processing of the smaple takes place in a closed container under high pressure condition. This decreases the digestion time.

While high-pressure vessels are generally used for biological and organic chemical samples, lower pressure vessels are generally used for soil/sediment, catalysts, environmental samples.

Use of Digesters

• Laboratory Research
• Sample Testing
• Process Study
• Pharmaceuticals
• Neutraceuticals
• Industrial Chemicals