Using the optimum specialty gas and equipment will greatly improve the accuracy of your analytical results when using Atomic Absorption (AA) Spectroscopy. AA Spectroscopy comprises the techniques of Flame Atomic Absorption Spectroscopy (FAAS), Graphite Furnace Atomic Absorption Spectroscopy (GFAAS) and Hydride Generation Atomic Absorption Spectroscopy (HGAAS). Applications include the analysis of food, cement, ceramics, glass and metals, as well as analyses in biochemistry, geochemistry and the environment.
In FAAS, the most common AA technique, Acetylene is commonly used as a fuel gas and requires low levels of Phosphine and Hydrogen Sulphide to give a cleaner flame and less interference to ensure optimum analytical accuracy. Air and Nitrous Oxide are commonly used as an oxidant gas and require low levels of water, Hydrocarbons, CO and CO2 to ensure accuracy.
The Experis® specialty gases range from Air Products has been specially developed for the analytical user and includes ultra high purity gases with low critical impurity levels for this technique. We also offer a range of gas-handling equipment including high quality cylinder regulators, manifolds, valves and purge systems which will help to optimise the smooth operation and accuracy of your analysis.
The recommended gases and equipment for this application are listed below. Please note that our recommendation is based on common analytical requirements, so you may require a higher purity grade if analysing to lower concentrations or be able to use a lower purity grade if analysing to higher concentrations. If you require any additional advice on the right purity grade for your needs, please contact us.