Atomic Absorption Spectroscopy (AAS)

Atomic Absorption Spectroscopy (AAS)

AAS spectroscopy uses the absorption of light to measure the concentration of gas-phase atoms. Samples are vaporized in a flame and the atoms absorb ultraviolet or visible light and make transitions to higher electronic energy levels. The analyte concentration is determined from the amount of absorption. Flame temperatures of 3000º C are achievable using a gas mixture of acetylene and nitrous oxide. The limitation of this technique is that only one element may be analyzed at a time. Detection limits are element dependent with high ppb levels being common.

AA

Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES)

ICP-OES produces excited ions and atoms by ionization in an intense electromagnetic field that emit detectable amounts of light at characteristic wavelengths, with intensities proportional to the concentration of the ion. Argon plasmas reach temperatures up to 10,000 º C. Detection limits are typically in the low ppb range with the additional feature of analyzing multiple elements simultaneously

AA

Current Methods:
CA434 Method Validation for AA/ICP Assays
CA542 Out of Specification Results (OOS) for ICP/AA Assays
CA7001 Aluminum Chloride and Chlorohydrate by ICP
CA15006 Zinc Oxide Content by AA
CA19000 Perkin Elmer ICP 7000 Setup Procedure
CA19001 Cooper Content by ICP
CA19002 Titanium Dioxide Content by ICP
CA19005 Silver Content by ICP
CA19009 Aluminum by ICP
CA26060 Metal analyze by ICP