Optimization of Analytical Methods Using Response Surface Methodology - Part I: Process Variables

Novaes, Cléber Galvão; Yamaki, Regina Terumi; Paula, Vanderlúcia Fonseca de; Júnior, Baraquízio Braga Nascimento; Barreto, Jeferson Alves; Valasques, Gisseli Souza; Bezerra, Marcos Almeida

doi:10.21577/1984-6835.20170070

Cited by 46 publications

(30 citation statements)

References 17 publications

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“…For accomplishment of glycolysis process, the optimization of response surface methodology with the Box-Behnken design [19,20] was carried out, aiming the monomer yield response optimization to 3 variables: reaction time, temperature and mass ratio between ethylene glycol/PET in 3 levels (1, 0, +1), allowing to verify the interaction between variables, where the number of experiments is given by Equation 2:…”

Section: Experiments Designmentioning

confidence: 99%

PET glycolysis optimization using ionic liquid [Bmin]ZnCl3 as catalyst and kinetic evaluation

et al. 2018

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ObstractIn the present work, the depolymerization of polyethylene terephthalate (PET) was performed by the method of glycolysis with ethylene glycol. The process was carried out using a factorial design in the Box-Behnken optimization model, using a response surface methodology (RSM) in which three factors (time, temperature and mass ratio of ethylene glycol) were studied in three levels of variation (-1, 0, +1) with two replicates of the center point, totalizing 15 experiments for which the yield of bis (2-hydroxyethyl) terephthalate (BHET) monomers formed in the process was chosen as response. In parallel, the Arrhenius kinetic test was used to determine the apparent activation energy (Ea) for the 1-butyl-3-methylimidazole trichlorozincate ([Bmin]ZnCl 3 ) -catalyst used in the depolymerization process. The products of glycolysis obtained were characterized by spectroscopic techniques (FTIR), ( 1 H and 13 C NMR), thermal analyses (TGA) and (DSC) and Mass Spectrometry LC-MS/MS hybrid Quadrupole-Orbitrap.

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Section: Experiments Designmentioning

confidence: 99%

PET glycolysis optimization using ionic liquid [Bmin]ZnCl3 as catalyst and kinetic evaluation

et al. 2018

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“…Para orientar a validação os órgãos ou agências responsáveis elaboram diretrizes que devem ser seguidas pelos laboratórios e analistas quando na execução de metodologias próprias de uso analítico (COELHO et al, 2018). Tais diretrizes, previamente estudadas e exaustivamente verificadas, quando adotadas pelos laboratórios fornecem aos órgãos a garantia de que os dados por eles produzidos são corroborados pelas próprias técnicas propostas e que carregam a confiabilidade da certificação estabelecida (NOVAES et al, 2017).…”

Section: Validation Of Analytical Methods For Quantification Of Fipronunclassified

Validação De Método Analítico Para Quantificação Do Fipronil Por Cromatografia Líquida De Alta Eficiência

Pagan¹,

Lima²,

Maciel³

et al. 2019

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“…Atualmente, a quimiometria é definida como uma ciência que emprega uma abordagem multidisciplinar, que inclui também matemática e estatística, e vem se tornando indispensável para pesquisadores modernos de química analítica. 68,69 O principal objetivo da quimiometria é converter uma grande quantidade de dados em informações significantes e úteis. Inúmeros algoritmos computacionais e estatísticos são aplicados para a realização dessa tarefa.…”

Section: Libs E Quimiometriaunclassified

Laser Induced-Breakdown Spectroscopy (Libs): Histórico, Fundamentos, Aplicações E Potencialidades

Costa¹,

Augusto²,

Castro³

et al. 2019

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This review attempts to present a broad view of the technique laser-induced breakdown spectroscopy (LIBS), since its origin, fundamentals, sample preparation strategies, use of chemometric tools for data processing, the advantages and limitations with regard to qualitative and quantitative analysis, aplications and future trends as an analytical technique that is in consolidation in analytical chemistry. LIBS is a rapid and versatile, which is able of providing qualitative and quantitative analytical information for practically any sample, in a virtually non-destructive way, without any substantial sample preparation. The instrumentation is simple, robust, compact, and enables remote analysis. The advancement of the LIBS applications in the areas of agriculture, environmental, food, biological/pharmaceutical, forensic, metallurgy and electronic waste were discussed in detail in this review. We consider that this review will be an important tool concerning dissemination of the LIBS, mainly for audience of undergraduate courses, and disciplines related to instrumental analysis.

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Optimization of Analytical Methods Using Response Surface Methodology - Part I: Process Variables

Cited by 46 publications

References 17 publications

PET glycolysis optimization using ionic liquid [Bmin]ZnCl3 as catalyst and kinetic evaluation

PET glycolysis optimization using ionic liquid [Bmin]ZnCl3 as catalyst and kinetic evaluation

Validação De Método Analítico Para Quantificação Do Fipronil Por Cromatografia Líquida De Alta Eficiência

Laser Induced-Breakdown Spectroscopy (Libs): Histórico, Fundamentos, Aplicações E Potencialidades

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