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|Title:||ToF-SIMS and PCA studies of Seggianese olives and olive oil||Authors:||Focardi, Silvia
D., LEACH SCAMPAVIA
D. G., Castner
|Keywords:||Olives; Surface analysis; Pesticides; Chemometrics; ToF-SIMS||Issue Date:||2006||Project:||None||Journal:||COLLOIDS AND SURFACES. A, PHYSICOCHEMICAL AND ENGINEERING ASPECTS||Abstract:||
In recent years the characterization of agricultural and food products has focused on nutritional properties. However, additives and contaminantsmay not only be transferred to plants and fruits, but they can also induce alterations and compromise the overall quality. In this context, chemicalfingerprint analysis is a valuable tool for complementing more conventional analytical methods. We used time of flight secondary ion massspectrometry (ToF-SIMS) to characterise three different groups of Seggianese olives: (i) treated with an insecticide (dimethoate) and a fungicide(copper oxychloride) (TU); (ii) untreated (UT); and (iii) treated-washed (TW). Intact olive slices and olive oil were analyzed. Principal componentanalysis (PCA) of the Tof-SIMS spectra was used to investigate similarities among samples. Results showed that TW olives were more similar toUT samples than to TU samples. However, the washing process was not totally effective, since the treatment was able to induce alterations in thecomposition of the olives.
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