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X Gruber, P. Kregsamer, P. Wobrauschek, C. Streli:
"Total-reflection X-ray fluorescence analysis of Austrian wine";
Spectrochimica Acta Part B, 61 (2006), 1214 - 1218.

The concentration of major, minor and trace elements in Austrian wine was determined by total-reflection X-ray fluorescence using gallium as
internal standard. A multi-elemental analysis was possible by pipetting 6 μl of wine directly on the reflector and drying. Total-reflection X-ray
fluorescence analysis was performed with Atomika EXTRA II A (Cameca) X-rays from a Mo tube with a high-energy cut-off at 20 keV in totalreflection
geometry. The results showed that it was possible to identify only by the elemental analysis as fingerprint the vineyards and year of
vintage among 11 different wines.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC06588164