vacuum desiccator

简明释义

真空干燥器

英英释义

例句

1.Before weighing the powder, it was critical to place it in a vacuum desiccator to eliminate moisture.

在称量粉末之前，将其放入真空干燥器以消除水分是至关重要的。

2.We used a vacuum desiccator to keep our silica gel samples dry during the analysis.

我们使用真空干燥器在分析过程中保持硅胶样品干燥。

3.The vacuum desiccator is essential for drying hygroscopic materials in the lab.

在实验室中，真空干燥器对于干燥吸湿性材料是必不可少的。

4.After the experiment, the chemicals were stored in a vacuum desiccator to prevent degradation.

实验结束后，化学品被存放在真空干燥器中以防止降解。

5.To remove moisture from the samples, we placed them in a vacuum desiccator.

为了去除样品中的水分，我们将它们放入一个真空干燥器。

作文

In the realm of laboratory equipment, a vacuum desiccator plays a crucial role in the preservation and drying of various materials. This device is designed to create a low-pressure environment that effectively removes moisture from substances, making it an essential tool for chemists and researchers alike. The principle behind a vacuum desiccator is relatively simple: by reducing the air pressure inside the chamber, the boiling point of water decreases, allowing moisture to evaporate at lower temperatures. This feature is particularly advantageous when dealing with heat-sensitive compounds that might decompose if exposed to high temperatures.The construction of a vacuum desiccator typically includes a thick glass or plastic container with a tight-sealing lid, which ensures that the internal environment remains isolated from external humidity. A vacuum pump is often used in conjunction with the desiccator to evacuate air from the chamber, creating the desired vacuum effect. Inside the desiccator, one can find desiccant materials such as silica gel or anhydrous calcium chloride, which further absorb any residual moisture present in the air.One of the primary applications of a vacuum desiccator is in the preparation of samples for analysis. For instance, when preparing samples for spectroscopy or chromatography, it is imperative to eliminate any moisture that could interfere with the results. By placing the samples inside the desiccator, researchers can ensure that their materials are completely dry and ready for accurate testing.Moreover, a vacuum desiccator is also utilized in the storage of hygroscopic substances—those that readily absorb moisture from the air. Chemicals such as sodium hydroxide or lithium chloride, for example, can easily become contaminated or lose their effectiveness if not stored properly. By keeping these substances in a vacuum desiccator, laboratories can prolong their shelf life and maintain their purity.Another important aspect of using a vacuum desiccator is safety. Many chemical reactions release gases or produce heat, which can lead to hazardous situations if not managed properly. The controlled environment within a desiccator helps mitigate these risks by providing a stable atmosphere where reactions can be monitored closely. Additionally, the use of a vacuum reduces the likelihood of explosive reactions that can occur when volatile substances are exposed to atmospheric pressure.In conclusion, the vacuum desiccator is an indispensable piece of equipment in many scientific fields. Its ability to remove moisture under low-pressure conditions makes it ideal for sample preparation, material storage, and ensuring safety during chemical experiments. As technology advances, we can expect to see further innovations in the design and functionality of vacuum desiccators, enhancing their efficiency and effectiveness in laboratory settings. Understanding how to properly utilize and maintain a vacuum desiccator will undoubtedly benefit anyone involved in scientific research or industrial processes requiring precise moisture control.

在实验室设备的领域中，真空干燥器在保存和干燥各种材料方面发挥着至关重要的作用。该设备旨在创造一个低压环境，有效去除物质中的水分，使其成为化学家和研究人员必不可少的工具。真空干燥器背后的原理相对简单：通过降低腔室内的气压，水的沸点降低，从而使水分能够在较低温度下蒸发。这一特点在处理热敏感化合物时尤为有利，因为这些化合物如果暴露于高温下可能会分解。真空干燥器的结构通常包括一个厚玻璃或塑料容器，配有紧密密封的盖子，以确保内部环境与外部湿度隔离。真空泵通常与干燥器一起使用，以从腔室中抽出空气，创造所需的真空效果。在干燥器内部，可以找到如硅胶或无水氯化钙等干燥剂材料，这些材料进一步吸收空气中残留的水分。真空干燥器的主要应用之一是在样品分析的准备过程中。例如，在准备用于光谱分析或色谱分析的样品时，消除任何可能干扰结果的水分是至关重要的。通过将样品放置在干燥器内，研究人员可以确保其材料完全干燥并准备好进行准确测试。此外，真空干燥器还用于储存吸湿性物质——这些物质容易从空气中吸收水分。例如，氢氧化钠或氯化锂等化学品，如果不妥善储存，可能会受到污染或失去有效性。通过将这些物质存放在真空干燥器中，实验室可以延长其保质期并保持其纯度。使用真空干燥器的另一个重要方面是安全性。许多化学反应会释放气体或产生热量，如果管理不当，可能会导致危险情况。干燥器内的受控环境有助于通过提供一个稳定的气氛来减轻这些风险，在这里可以密切监测反应。此外，使用真空降低了在挥发性物质暴露于大气压力下发生爆炸性反应的可能性。总之，真空干燥器是许多科学领域中不可或缺的设备。它在低压条件下去除水分的能力使其成为样品准备、材料储存和确保化学实验安全的理想选择。随着技术的进步，我们可以期待在真空干燥器的设计和功能上看到进一步的创新，提高其在实验室环境中的效率和有效性。了解如何正确使用和维护真空干燥器无疑将使任何参与科学研究或需要精确湿度控制的工业过程的人受益。