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Analytical Laboratories, Research and Science

Atomic Absorption Spectroscopy

Atomic Absorption Spectroscopy (AAS) uses the absorption of light to measure the concentration of atoms in the gas phase. The atoms absorb light and make transitions to higher energy levels. It is the amount of absorption that determines the concentration of a particular component.

There are a number of analytical techniques based upon this principle, typical gases used are Acetylene, Nitrous Oxide, Zero Air, Nitrogen and Argon.

What Gases Do We Supply for Absorption Spectroscopy?​

Air Products' speciality gases have been specifically designed for the analytical user and their equipment. By using the Experis® gases product range, the customer can ensure accuracy of results and that their equipment performance is optimised.

BIP® Nitrogen

Critical impurity levels of 10 ppb oxygen and 20 ppb moisture ensures equipment remains accurate for longer.

BIP® Argon

Critical impurity levels of 10 ppb oxygen and 20 ppb moisture improves equipment resolution.

Synthetic Air (Zero Air)

With low THC components, this gas is ideally suited for measuring or detecting components in very low concentrations.


Low PH₃ and H₂S specifications provide a cleaner flame with less interference, allowing for optimum analytical results.


Ask the Expert

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Spesialis Pengembangan Bisnis

Which grade of acetylene is recommended for flame atomic absorption spectroscopy?

We recommend the use of Acetylene Premier for this application, based upon its low phosphine (PH₃) and hydrogen sulphide (H₂S) impurity levels.