One-class model with two decision thresholds for the rapid detection of cashew nuts adulteration by other nuts

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dc.creatorGlòria Rovira
dc.creatorCarolina Sheng Whei Miaw Botelho
dc.creatorMário Lúcio Campos Martins
dc.creatorMarcelo Martins Sena
dc.creatorScheilla Vitorino Carvalho de Souza
dc.creatorMaria Pilar Callao
dc.creatorItziar Ruisánchez
dc.date.accessioned2025-09-04T19:39:27Z
dc.date.accessioned2025-09-08T23:21:23Z
dc.date.available2025-09-04T19:39:27Z
dc.date.issued2023-02-01
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.format.mimetypepdf
dc.identifier.doi10.1016/j.talanta.2022.123916
dc.identifier.issn00399140
dc.identifier.urihttps://hdl.handle.net/1843/84881
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.rightsAcesso Aberto
dc.subjectCiência e Tecnologia de Alimentos
dc.subjectCastanhas
dc.subject.otherModelagem independente suave de analogia de classe
dc.subject.otherPortabilidade
dc.subject.otherTriagem multivariada
dc.subject.otherIntervalos de incerteza
dc.subject.otherAdulteração de nozes
dc.subject.otherLimites de decisão
dc.titleOne-class model with two decision thresholds for the rapid detection of cashew nuts adulteration by other nuts
dc.typeArtigo de periódico
local.citation.epage7
local.citation.spage1
local.citation.volume253
local.description.resumoA green screening method to determine cashew nut adulteration with Brazilian nut, pecan nut, macadamia nut and peanut was proposed. The method was based on the development of a one-class soft independent modelling of class analogy (SIMCA) model for non-adulterated cashew nuts using near-infrared (NIR) spectra obtained with portable equipment. Once the model is established, the assignment of unknown samples depends on the threshold established for the authentic class, which is a key aspect in any screening approach. The authors propose innovatively to define two thresholds: lower model distance limit and upper model distance limit. Samples with distances below the lower threshold are assigned as non-adulterated with a 100% probability; samples with distance values greater than the upper threshold are assigned as adulterated with a 100% probability; and samples with distances within these two thresholds will be considered uncertain and should be submitted to a confirmatory analysis. Thus, the possibility of error in the sample assignment significantly decreases. In the present study, when just one threshold was defined, values greater than 95% for the optimized threshold were obtained for both selectivity and specificity. When two class thresholds were defined, the percentage of samples with uncertain assignment changes according to the adulterant considered, highlighting the case of peanuts, in which 0% of uncertain samples was obtained. Considering all adulterants, the number of samples that were submitted to a confirmatory analysis was quite low, 5 of 224 adulterated samples and 3 of 56 non-adulterated samples.
local.publisher.countryBrasil
local.publisher.departmentFAR - DEPARTAMENTO DE ALIMENTOS
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0039914022007123

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