Minimal-Invasive Analytical Method and Data Fusion: an Alternative for Determination of Cu, K, Sr, and Zn in Cocoa Beans

Autor(es)

Gamela, Raimundo Rafael ^[1] ; Pereira-Filho, Edenir Rodrigues ^[1] ; Pereira, Fabiola Manhas Verbi ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, Grp Appl Instrumental Anal, BR-13560270 Sao Carlos, SP - Brazil

^[2] Natl Inst Alternat Technol Detect Toxicol Assessm, BR-14800060 Araraquara, SP - Brazil

^[3] Sao Paulo State Univ UNESP, Inst Chem, Bioenergy Res Inst IPBEN, Grp Alternat Analyt Approaches GAAA, BR-14800060 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FOOD ANALYTICAL METHODS; v. 14, n. 3, p. 545-551, MAR 2021.
• Citações Web of Science: 1

Resumo

In the present study, a minimal-invasive analytical method for determination of Cu, K, Sr, and Zn in cocoa beans was performed using energy X-ray fluorescence (EDXRF) and laser-induced breakdown spectroscopy (LIBS) combined with multivariate calibration. Partial least squares (PLS) chemometric technique was applied to modeling the data, and inductively coupled plasma optical emission spectrometry (ICP OES) technique was the reference method for the chemical elements concentration levels, after microwave acid mineralization. The figures of merit estimated for Cu, Sr, Zn, and K showed good performance, with acceptable trueness values (85-120%). Data fusion strategy between EDXRF and LIBS data was used to enhance the predictive capability of K. In addition, lower standard error of cross-validation (SECV) (872 mg kg(-1)) was obtained, showing better performance than those obtained by individual data. (AU)

• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/01102-8 - EMU concedido no processo 2018/18212-8: espectrômetro de fluorescência de Raios-X
• Beneficiário: Fabiola Manhas Verbi Pereira
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 18/18212-8 - Desenvolvimento de modelos quimiométricos para determinação de impurezas sólidas na matéria prima cana-de-açúcar utilizando o potencial da fluorescência de raios-X por energia dispersiva
• Beneficiário: Fabiola Manhas Verbi Pereira
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/24223-5 - Calibração empregando Laser-Induced Breakdown Spectroscopy (LIBS): alternativas, desafios, comparação das propostas existentes e proposição de um procedimento universal
• Beneficiário: Edenir Rodrigues Pereira Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular