Safe Handling of a Laboratory Desiccator

实验室干燥器是由重型玻璃制成的圆形封闭容器，这是一个普通的实验室玻璃器皿，并且具有多种用途，例如：

• Storage of standards under dry environment
• 储存用于称量恒重的材料
• Prolonged storage of hygroscopic materials
• 测定药品制造产品的干燥损失

The base of the desiccator supports a perforated plate below which the desiccant drying agent is kept.Commonly used drying agents are anhydrous calcium chloride, drierite (calcium sulphate) and silica. Such desiccants can be regenerated by heating. A small amount of cobalt indicator compound is generally added which turns pink from blue on absorption of moisture. This lets you know when to regenerate the desiccant.

只有当密封干燥器是有效的公关event contact of contents with outside air. Some desiccators are provided with vacuum fittings for evacuation of inside air for long-term storage of moisture sensitive materials.

干燥器的类型

有四种类型的干燥器：

标准：使用作为干燥剂盒，并且需要经常改变，具体取决于它们的使用程度。标准实验室干燥器需要监测，但相当经济。

Vacuum： 这真空干燥器requires a pump to remove any air or moisture from the chamber. The length of the vacuum process depends on the model.

Automatic：这个干燥器配有电气风扇和加热器，它们连续用于再生干燥气氛。它需要最小的监控，它非常可靠。但是，它们可能是昂贵的。

Gas Purge： 这drying agent used in thedesiccator是氮气和氩气。它们以更快的速度保持干燥器内的干燥气氛。

Benefits of a Desiccator

This laboratory device can absorb moisture in humid conditions and keep the items dry and dust-free. They also prevent any hygroscopic materials from reacting with moisture that is caused by humid conditions.

它不习惯干燥材料，而是保持干燥的气氛并保持材料干燥。一些实验室干燥器s are used for cooling a heated object or material.

In any regulated environment, such as a laboratory, there is a need to control the environment because it determines the completion of various tasks. Many factors cause a hindrance like fluctuating temperatures, dust particles, humidity, and so on; hence, these elements have to be controlled and regulated.

Listed below are some of the top benefits of each desiccator:

标准干燥器: This unit is operated and monitored manually. It will take in the moisture, and once saturated, you will have to replace or heat it to regenerate the desiccant. These units provide flexibility, are affordable, and quite convenient.

自动干燥器： 这se require minimal monitoring and make use of heaters/electric fans to prevent saturation. The humidity is maintained at a constant low and the units are programmable; they are also set to operate on a preset schedule.

They provide control over humidity and use silica gel beads that last for a long time, this also reduces the need to replace the desiccation material, constantly.

Gas Purge Desiccator: If you want fast removal of humidity, the best bet is to opt for a gas purge desiccator. They use a slow and steady flow of inert gas to extract moisture. The gas used is usually dry nitrogen, which is available easily. These units create a dust-free environment and are great for clean rooms.

真空干燥器: If you are stuck in a situation where you need to remove air and humidity, go for a真空干燥器。These units remove air and moisture with a vacuum pump. They are great at collecting dust and can be used as standard desiccators as well.

Tips to Consider before Purchasing a Desiccator

Controlling the Dry Environment

The main干燥器的目的is to keep the components dry and not let any moisture seep in. Hence, before you buy a实验室干燥器确保您彻底检查并衡量其防潮功能。

Humidity Control Length

一些desiccators tend to offer humidity control features, but it’s only there for a limited period when compared to advanced versions. The advanced versions include humidity control benefits at any time.

Depending on the function of the desiccator, and whether you want to use it temporarily or permanently, you should purchase it accordingly.

Price

价格的价格desiccatordepends on their type, size, style, automation. If the apparatus is sophisticated, it will be costly.

Portability

一些experiments or labs need to move the desiccator from one location to another. Therefore, mobility becomes an important factor in the desiccator selection.

间隔监测

As mentioned before, standard desiccators will need to be monitored frequently and automated ones require minimal monitoring. Therefore, you need to consider if you have the bandwidth to monitor thedesiccator很长一段时间;如果您想手动或自动完成，这是您的决定。

Drying Speed

一些实验室干燥器s will take more time to dry the components than others. Hence, you need to see the speed at which you want the drying to occur because it will help you determine the selection criteria.

The Reputation of the Supplier

建议从可信任和知名的供应商处购买干燥器。选择将为您提供具有最小风险，缺陷或损害赔偿的干燥器的供应商。

Safe Handling and Use of a Desiccator

Desiccator通常被认为是理所当然的，并且在其处理中经常被忽略的预防措施。但是，请记住，如果在处理和使用干燥器时不受足够的照顾，可能会发生事故。

干燥器的盖子通常用薄层的硅氧烷润滑脂密封在其主体上。这形成了密封密封，并在打开盖子并将其放回来进行预防措施。

• Slide cover horizontally with a gentle force until it starts moving. Grasp the knob with one hand and with the other hold the base and apply more force to take it off completely
• Do not get tempted to lift the desiccator by lifting the top knob. Always lift with both hands holding the bottom and the cover.
• 将盖子轻轻盖上顶部并通过施加温和的力慢慢地关闭，直到它关闭。在两个方向上轻轻旋转盖子以确保气密密封。
• 确保边缘不会耗尽润滑脂at same time do not use an excessive amount of grease. A thin uniform film is usually sufficient.
• Keep the lid upside down on removal but away from the workbench edge to prevent rollover
• 在从热空气烤箱中仔细放置一个热物质。将坩埚与电梯Ajar保持几分钟，然后通过滑动它来驱逐热空气，使盖子由于热空气的扩展而导致盖子不会被吹出，并且还可以防止稍后的真空形成，这可能会开启困难。

Opening a Vacuum-Sealed Desiccator

当施加真空时，请注意不要超过规定的限制，因为它可能会危险。逐渐打开 - 顶部停止释放在开口时内的真空。尝试滑动盖子。如果滑动难以仔细使用薄刮刀，以在盖子和身体之间产生裂缝。在听到真空释放的嘶嘶声上，另一方面通过牢固地握住底部的真空释放声音。

干燥器可常规用于储存水分敏感化合物，标准和需要称量恒重的应用。然而，不建议使用与钠金属如钠金属具有高反应性的材料的储存，因为它可以导致暴力反应的潮湿空气接触。