Pure laboratory gases

atmosphere control

As we know, the implementation of tests and analyzes in the laboratory can become dangerous based on many factors. One of those factors is the environment. Laboratories contain sensitive equipment, samples, and procedures that are performed there. In order to maintain optimal levels of oxygen, humidity and temperature in the laboratory, nitrogen gas is usually used. As a non-reactive gas, it is an excellent element for keeping the atmosphere stable in laboratories. In addition to maintaining optimal oxygen levels in the atmosphere in laboratories, it can also help control oxygen levels in other laboratory equipment such as glove boxes and cell incubators.

chromatography

Helium and hydrogen are usually used as the carrier gas of choice in gas chromatography. This is because they are efficient gases with higher flow rates and work with most detection systems. The detection system provides a measurement of the mixture with the carrier gas. Other gases can be used as carrier gas such as argon or nitrogen, but it depends on the detector system used as there are many different types. Helium typically has a shorter analysis time because it is a lighter gas and has a high flow rate.

When ordering gases to use as carriers, you need to make sure they are ultra-high purity gases with very low levels of oxygen in the tank. When the gases are used, they are put through a gas system in the laboratory that removes any potential contaminants or water.

The pressure at which the gases are released is also important. Pressure build-up should be prevented by using a pressure regulator on the reservoir and gas chromatograph inlet.

Evaporative Light Scattered Detectors (ELSD)

There are many different types of chromatography methods, but especially for high pressure liquid chromatography, ELS detectors are used. These ELS detectors can help identify samples that cannot be found using UV detection. ELSDs require a clean inert gas to spray the liquids used to wash the components under test. This is where nitrogen plays a vital role. The components to be tested are carried by nitrogen gas to create a spray, which is then heated to vaporize.

Compressed air can sometimes be used in ELS detectors, but this requires an additional step to remove any traces of oil or water that may remain. This is why it is preferable to use a clean inert gas such as nitrogen.

Instrumentation

As a general rule for gases used for laboratory instruments, the higher the purity, the lower the impurity levels that can cause problems with the instruments and the results of measurements and analysis. Different gases with high purity are used, including: helium, hydrogen, argon and nitrogen. A mixture of nitrogen and other gases is used to calibrate the instrument aperture because each instrument has a different minimum and maximum calibration aperture it can support.

In addition, gases are used to clean analytical equipment, which is why high purity levels are important when using gases in the laboratory. At Source Air Industries, we provide our customers with a wide range of gas products from high purity gases to specialized gas mixtures. We have strict quality control processes in place at our facilities to ensure that our gases consistently meet your needs. We comply with FDA regulations and adhere to CGA specifications.

Customer service is our priority, so we’re serious about taking the time to help you find exactly what you need to get the job done. We also offer next business day delivery and can install tanks based on your needs and availability.

If you are in the market for high purity gases and special blends, you have come to the right place. Call us at (562) 426-4017 if you have any questions at all. You can also fill out our online quote form to get a free quote.