Plasma spectrometry

Plasma spectrometry

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Credit: PATRICE LATRON/LOOK AT SCIENCES/SCIENCE PHOTO LIBRARY

Caption: Plasma spectrometry. Scientist analysing chemical samples using plasma desorption mass spectrometry (PDMS) at a petrochemical laboratory. PDMS is a technique for analysing non-volatile molecules, using heavy ions to penetrate the samples. This causes chemical reactions that produce other ions which are ejected from the surface. These ejected ions are then analysed in a mass spectrometer to determine the composition of the original sample.

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