What is the primary function of a desiccator in a laboratory setting?

The primary function of a desiccator in a laboratory setting is to remove humidity. Desiccators are sealed containers that contain desiccants—materials that absorb moisture—allowing for the preservation of samples in a dry environment. This is particularly crucial in analytical procedures where moisture can interfere with the stability of the samples or the accuracy of measurements. By keeping samples in a desiccator, researchers can prevent degradation, facilitate accurate weighing, and ensure that chemical reactions are not adversely affected by excess moisture.

In contrast, cooling samples is not the primary purpose of a desiccator, as there are other equipment types like refrigerators or ice baths better suited for this task. Similarly, increasing air pressure is not a function attributed to desiccators; rather, they work under ambient atmospheric pressure to maintain low humidity levels. Lastly, mixing solutions is a separate laboratory activity usually performed with stirrers or shakers, and not a function of a desiccator, which is designed solely for moisture control.