GEOFF TOMPKINSON / SCIENCE PHOTO LIBRARY GEOFF TOMPKINSON / SCIENCE PHOTO LIBRARY
Scientist using an atomic absorption (AA) spectrometer to analyse water samples. The results are displayed graphically by a computer. Atomic absorption spectrometry makes it possible to measure extremely small concentrations of about 40 different metals in a sample. Typical sensitivity might be one part of metal (lead, for example) in a million million parts, an accurate means of detecting pollution of water by heavy metals.
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