Trace elements 'can be analysed' using aerodynamic levitation

Trace elements in rock samples can successfully be analysed through the use of aerodynamic levitation, studies using mass spectrometry reveal.

Researchers at Georg-August-Universitaet in Germany combined aerodynamic levitation with mass spectrometry to determine the composition of rock dust evaporated through the process.

Writing in Geochemical Transactions, they explain that levitating dust in a column of gas allows it to be melted at high temperatures, releasing trace elements for further study.

They conclude: "Levitation melting is a rapid means for the preparation of bulk rock powders for major, minor and trace element analysis."

Most elements can be studied with a high degree of certainty, they add, with the exception of sodium and potassium, which are relatively volatile.

Evaporated materials obtained from silicate melts may particularly be well quantified through aerodynamic levitation, laser melting and mass spectrometry.

Geochemical Transactions is the official periodical publication of the American Chemical Society's geochemistry division.