Desiccators are sealed containers that are used for drying samples under atmospheric pressure or vacuum pressure. These can also protect chemicals that are hygroscopic, as well as protect samples from dust and moisture in the air. Desiccators can be made of glass, polypropylene and polycarbonate, or acrylic in cabinet form.
Desiccators:
Glass Glass desiccators are made from borosilicate glass which makes the desiccator more robust. However, these desiccators can shatter and it is recommended that these desiccators are placed behind a screen when under vacuum.
Polycarbonate And Polypropylene Polycarbonate desiccators are shatterproof and implosion proof, giving them high impact resistance and allowing them to withstand high vacuum pressures.
Vacuum Vacuum desiccators can dry samples in two ways under vacuum or by using a desiccant. Drying under vacuum uses a vacuum pump to remove any air from the system. Inert gases, such a nitrogen gas, can be used to achieve ultra-dry environments. Desiccants can help induce or sustain dry environments depending on the moisture content of the air and sample.
Non-vacuum Non-vacuum desiccators can also dry samples in two ways using desiccants or by purging. Purging of a desiccator uses either an inert gas, such as nitrogen, or compressed dry air to reduce oxygen levels. This desiccator uses atmospheric pressure to dry the chemicals.
Acrylic Cabinet Desiccator Cabinets can lower humidity levels and prevents moisture and [dust from damaging samples. These cabinets use a desiccant or an inert gas to remove moisture. The cabinet is preferred when drying bigger samples or a large quantity of samples at the same time. The shelves are adjustable to accommodate taller samples, and most cabinets are clear to easily see samples inside.
Stopcock
Stopcocks are used on vacuum desiccators to help evacuate the liquid or gas from inside the desiccator. This helps to reduce the chances of the desiccator from imploding as the stopcock can reduce the pressure inside the desiccator if opened.
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