Nell Zhoie May 1, 2018

Lab test tubes are designed for a variety of laboratory practices. The test tubes will help you store and transport solutions easily. Plastic test tubes are flexible and cheap. On the other hand, glass test tubes are durable and expensive. Most test tubes can be equipped with screw caps, caps and lids that make storage easier. If you want to retain the solution for a long time, you must make use of glass test tubes. Glass tubes made of borosilicate are less sensitive to temperature fluctuations. And, they cannot be broken easily. This is why scientists and chemists prefer borosilicate glassware over the plastic ones. And, when you buy tubes from go for the premium Pyrex ones!

Storing liquids in glass test tubes

When it comes to storing chemicals in glass test tubes, a deciding factor would be “air”. It is important to ensure that the vessel is air-tight. As mentioned previously, test tubes are now designed with air tight caps. You can use these caps to prevent the solution from evaporating. Additionally, the air tight cap protects the test tube from mold spores, bacteria, dust particles and any impurity that can affect the result of your test. Likewise, the cap prevents different gases from dissolving in your sample. Dissolved gas particles can affect the biomolecules in your sample. For example, sylfhydryl solutions react with oxygen and result in the formation of disulphides). Likewise, carbonic acid produces carbon dioxide when mixed in water. The carbon dioxide then decreases the solution’s pH value. This affects the stability of proteins and even influences on the protonation state.

Plastic test tubes come with many drawbacks. You cannot (or should not) use plastic test tubes for reactions that involve harsh chemicals. This is why you must opt for premium test tubes with caps.

The Falcon Test Tubes

If you have liquid samples that are less 50 milliliters, you will find the Falcon test tubes useful. These tubes are also known as Falcon centrifuge tubes. The falcon test tubes are designed and manufactured to handle different volumes of liquid. They are often shipped with screw caps. The falcon tube has a conical bottom that makes it easy to extract, and store small amounts of solution left in the test tube. It is important to store the falcon tubes in ideal racks. Some tubes have a free-standing design. These tubes have a plastic “skirt” at the bottom for standing. You can store falcon test tubes with plastic “skirts” on any horizontal surface.

Moving on, falcon tubes are graduated. This means, you can estimate the amount of solution in the tubes easily. Likewise, you will be able to transfer samples accurately. In any lab experiment, it is important to use samples accurately. Additionally, the falcon test tubes can be labelled easily. The screw caps have small white surfaces for labelling. Labels can be written using marker pens or printed.

The others

There are so many different types of test tubes. The falcon tubes are widely used. Likewise, you have the narrower and taller Wassermann tubes.