2011 Volume 80 Issue 4 Pages 506-511
A technique to determine the geographic origin of wine was examined using 99 samples from Japan and 4 other countries. The contents of 21 elements (Al, B, Ba, Ca, Cd, Cr, Cs, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, P, Pb, Sr, V, and Zn) were determined by inductively coupled plasma optical emission spectrometry. A linear discriminate analysis (LDA) model was created to identify wine from Japan and other countries. With these parameters, 99% correct classification was achieved. We developed an LDA model calibrated with the analytical results of 5 elements (B, Ca, Cr, K, and Mg) chosen by a backward stepwise procedure. This LDA model identified the origin of wines as Japan with 91% certainty. This result suggests that discriminating by inorganic element composition may be useful to identify Japanese wine for import clearance.
