| application of inorganic element ratios to chemometrics for determination of the geographic origin of welsh onions. | the composition of concentration ratios of 19 inorganic elements to mg (hereinafter referred to as 19-element/mg composition) was applied to chemometric techniques to determine the geographic origin (japan or china) of welsh onions (allium fistulosum l.). using a composition of element ratios has the advantage of simplified sample preparation, and it was possible to determine the geographic origin of a welsh onion within 2 days. the classical technique based on 20 element concentrations was also ... | 2004 | 15366824 |