Multivariate approaches for stability control of the olive oil reference materials for sensory analysis – part I: framework and fundamentals

Abstract

The normalized Euclidean and Mahalanobis distances, the so-called nearness and hardiness indices respectively, have been defined as new similarity indices to range the values from 0 to 1. Also, the squared mean from Hotelling's T -statistic and Q -statistic has been proposed as another similarity index. © 2018 Society of Chemical Industry.

Chromatographic Fingerprinting Enables Effective Discrimination and Identitation of High-Quality Italian Extra-Virgin Olive Oils

“…Such indices are defined as a number between 0 and 1, which describes the equivalence of two objects characterized by multivariate data; the value 0 indicates maximum difference and 1 implies maximum similarity. In this study, the nearness index (NEAR) 41 was employed; it can be calculated by eq 1 where x c i and x r i symbolize each element of the considered and reference characteristic profiles, respectively. Note that eq 1 has two terms.…”

“…Such indices are defined as a number between 0 and 1, which describes the equivalence of two objects characterized by multivariate data; the value 0 indicates maximum difference and 1 implies maximum similarity. In this study, the nearness index (NEAR) 41 was employed; it can be calculated by eq 1…”

Chromatographic Fingerprinting and Food Identity/Quality: Potentials and Challenges

“…Some of the few examples available concern the verification of homogeneity and stability of olive oil reference materials. 22 , 23 …”

“…Some of the few examples available concern the verification of homogeneity and stability of olive oil reference materials. 22,23 There are as of yet few studies addressing chromatographic fingerprint fusion, despite its high potential. In fact, only three articles dealing with the authentication of edible vegetable oils and coffee have been found.…”

“…These reviews mostly gather studies that are applying quality testing, and a few studies have been reported addressing identity testing. Some of the few examples available concern the verification of homogeneity and stability of olive oil reference materials. , …”