What Gases Are Used in Laboratories?

Laboratories rely on nitrogen, helium, argon, hydrogen, and carbon dioxide to keep research, testing, and analysis running smoothly. They each serve a specific purpose depending on the equipment and application.

Why Is Nitrogen the Workhorse Gas in Most Labs?

Nitrogen is the most commonly used gas in laboratories because it’s inert, affordable, and incredibly versatile. It doesn’t react with most substances, which makes it perfect for creating a stable environment where you don’t want oxygen or moisture messing with your results.

Labs use nitrogen for purging systems before and after analysis. This clears out contaminants and moisture that could throw off sensitive readings.

It’s also a go-to for maintaining inert atmospheres in glove boxes and reaction vessels. If a compound is sensitive to oxygen, nitrogen creates the buffer that keeps it stable.

Gas chromatography (GC) setups depend on nitrogen as a carrier gas, moving samples through the system without interfering with the chemistry being studied. And when you need to store sensitive samples in cryogenic conditions, liquid nitrogen is often the answer, since it gets cold enough to preserve biological material for years.

What Role Does Helium Play in Laboratories?

Helium is essential for gas chromatography and mass spectrometry, two of the most common analytical techniques in modern labs. Its low reactivity and small molecular size make it ideal for carrying samples through instruments without altering their chemical makeup.

In gas chromatography, helium acts as the carrier gas, pushing vaporized samples through a column so they can be separated and analyzed. Because helium doesn’t react with the compounds being tested, you get cleaner, more accurate readings.

Mass spectrometry setups also depend on helium, particularly in ion trap systems where it serves as a buffer gas to improve ion focusing and resolution. Superconducting magnets in nuclear magnetic resonance (NMR) spectrometers rely on liquid helium too, since it’s one of the few materials cold enough to keep those magnets functioning at superconducting temperatures.

How Do Labs Use Argon and Other Inert Gases?

Argon gets used in labs that need an inert atmosphere but want something even less reactive than nitrogen. It’s heavier than air, which makes it useful for blanketing reactive materials and preventing oxidation during sensitive procedures.

Welding and metallurgy labs use argon extensively for testing metal samples without introducing oxidation that could skew results. Argon is also common in plasma-based instruments, like inductively coupled plasma (ICP) spectrometers, which are used to detect trace elements in samples.

Here are a few other gases used by labs for certain applications: 

• Hydrogen: used as a carrier gas in gas chromatography and as a fuel source for flame ionization detectors.
• Carbon dioxide: used in incubators to maintain stable growth conditions for cell cultures, mimicking the CO₂ levels found in biological environments.
• Oxygen: used in combustion analysis and certain biological applications where controlled oxygen levels are necessary.

Each of these gases serves a narrow but critical function. A cell biology lab running incubators needs reliable CO₂ delivery just as much as an analytical chemistry lab needs consistent hydrogen for its GC setup.

Why Does Gas Purity and Supply Reliability Matter So Much in Lab Settings?

Purity and reliability matter because even small impurities can compromise results, and inconsistent supply can stall entire projects. Labs aren’t like certain manufacturing floors where a slightly impure gas might not matter. In research and testing environments, contamination or inconsistency can invalidate weeks of work.

Think about it this way: if you’re running a study that depends on precise gas chromatography readings, and your carrier gas has trace impurities, you might not catch the problem until you’re deep into data analysis. That’s an expensive mistake, both in time and credibility.

This is why labs typically work with distributors who understand the difference between industrial-grade gases and the high-purity gases used in laboratory applications. A distributor that treats all nitrogen or all argon the same, regardless of application, isn’t doing their customers any favors. Labs need partners who can supply the right purity level for the right instrument, whether that’s ultra-high purity for mass spec work or a standard grade for general purging.

Supply reliability is just as important. A lab that’s mid-experiment doesn’t have room for a delayed helium shipment or a nitrogen tank that runs dry on a Friday afternoon.

Bringing It All Together

Laboratories depend on a specific set of gases, and each one plays a distinct role in keeping research accurate and equipment running properly. Nitrogen handles the everyday heavy lifting, helium powers precision instruments, argon protects sensitive materials from oxidation, and specialty gases like hydrogen and CO₂ fill in the gaps for more specific applications.

Choosing the right gas supplier—one who understands purity requirements and won’t leave you waiting on a shipment—is more important than ever.

Tyler O'Brien

Tyler is a results-driven marketing professional specializing in the industrial gases and equipment industry, bringing his 10 years of technical expertise and digital marketing acumen to the complex industrial gas B2B environment.