Atomic Absorption Spectrometers

Overview of the Atomic Absorption

Atomic absorption Spectroscopy is a common and well-established technique for detecting metals and metalloids. It is a very reliable and simple technique to use with few interferences. The method is based on the fact that when metal ions are converted to their atomic state by means of a flame, light of the appropriate wavelength is absorbed and the amount of absorption can be measured against calibration curves and converted into concentration.

• A Varian Spectra AA-300 flame system with graphite furnace and vapour generation accessory is located in the Grant Institute of Earth Sciences. The instrument is used for trace metal analysis of geological and environmental samples. Used mainly when only a small number of elements are of interest.

• A Unicam AA M Series atomic absorption spectrometer with graphite furnace for analysis at sub-ppm concentrations. Autosamplers are available for flame and furnace operation. The instrument is located at the Institute of Atmospheric and Environmental Sciences, which specialises in analysis of environmental samples.

• A Solaar M5 atomic absorption spectrometer with a 40 position autosampler and graphite furnace for analysis at sub-ppm concentrations. The instrument, which is located in the Institute of Geography, is used for trace metal analysis of environmental samples including cosmogenic samples (see Cosmogenic Nucleids).

Access

Contact either: Ann Mennim,
by e-mail (Ann.Mennim@ed.ac.uk) or telephone: 0131 650 8532

Or: Andy Gray,
by e-mail (Andy.Gray@ed.ac.uk) or telephone: 0131 650 5418

Charges

Users must provide an IT form, Purcahse Order Number or Cost Center prior to using the instrument.