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Validação de equipamentos NIR para utilização no controlo de qualidade das fábricas de alimentos compostos para animais do grupo Valnutri
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Abstract(s)
O presente Projeto, realizado no âmbito do mestrado em Gestão da Qualidade e Segurança Alimentar, teve como objetivo a validação de equipamentos NIR (Near Infrared Spectroscopy) para utilização no controlo de qualidade das fábricas de alimentos compostos para animais do grupo Valnutri.
A tecnologia NIR permite uma análise rápida e fidedigna de inúmeros parâmetros interessantes para o controlo da qualidade de alimentos compostos para animais, assim como das matérias-primas que são utilizadas na sua produção. Foi estipulado pelo departamento da qualidade da Valnutri, que os parâmetros analíticos avaliados nas amostras são os teores de proteína, fibra, gordura, humidade, amido, cinza e cálcio. A elevada demanda de amostras a analisar diariamente, de forma a garantir a qualidade das matérias-primas rececionadas nas fábricas bem como dos alimentos compostos para animais, durante a sua produção e até ao produto final, torna incomportável a avaliação da composição centesimal dos alimentos por métodos clássicos ou de referência. Em alternativa, surgiu a tecnologia NIR, Near Infrared Spectroscopy, que permite a quantificação de todos estes parâmetros em tempo real de uma forma simples, rápida e económica. Em caso de ocorrência de alguma irregularidade, esta é detetada rapidamente, o que permite encontrar soluções de forma mais eficiente e adequada, evitando não só irregularidades no produto final, mas também possíveis reclamações de clientes e perdas económicas.
Para que o processo de controlo da qualidade seja fidedigno, é de extrema importância que os resultados provenientes das análises no equipamento NIR sejam robustos e apresentem um nível de confiança considerável. Para o efeito, é necessário realizar a validação do equipamento NIR, com o equipamento de referência.
Neste trabalho procedeu-se à validação dos equipamentos NIR DS2500 da FOSS e da sonda portátil MicroNIR da marca ABVista, utilizando como referência o NIR MPA II da marca Bruker. O processo de validação dos equipamentos baseou-se na análise estatística dos resultados obtidos (n=20) com diferentes produtos (rações e matérias-primas) e diferentes parâmetros nutricionais, de acordo com as indicações referidas na NP EN ISO 12099. Os resultados alcançados permitem concluir que a confiança do processo de validação está dependente do tipo de equipamento utilizado. De facto, a sonda portátil MicroNIR, que trabalha numa gama de comprimentos de onda reduzida, conduziu a resultados menos robustos do que os alcançados com o NIR DS2500 cuja gama de trabalho é similar ao equipamento de referência. Por outro lado, outros fatores, como as características da matéria-prima (cor, homogeneidade, etc) ou os parâmetros analisados (cinza, fibra, etc) também condicionam a qualidade da validação.
This project, carried out within the scope of the master's degree in Quality Management and Food Safety, aimed to validate NIR (Near Infrared Spectroscopy) equipment for use in quality control in compound feed factories of the Valnutri group. NIR technology allows a quick and reliable analysis of numerous interesting parameters for controlling the quality of compound feed, as well as the raw materials used in their production. It was stipulated by Valnutri's quality department that the analytical parameters evaluated in the samples are the contents of protein, fiber, fat, moisture, starch, ash and calcium. The high demand for samples to be analyzed daily, in order to guarantee the quality of raw materials received in factories as well as compound feeds for animals, during their production and until the final product, makes it unaffordable to evaluate the proximate composition of foods by classical or reference methods. As an alternative, NIR technology, Near Infrared Spectroscopy, emerged, which allows the quantification of all these parameters in real time in a simple, fast and economical way. If any irregularity occurs, it is quickly detected, which allows solutions to be found more efficiently and appropriately, avoiding not only irregularities in the final product, but also possible customer complaints and economic losses. For the quality control process to be reliable, it is extremely important that the results from analyzes using NIR equipment are robust and present a considerable level of confidence. To this end, it is necessary to validate the NIR equipment with the reference equipment. In this work, the NIR DS2500 (FOSS) equipment and the portable MicroNIR probe (ABVista) were validated, using the NIR MPA II (Bruker) as reference. The validation procedure was based on the statistical analysis of the results (n=20) attained from different products (feed and raw materials) and different nutritional parameters, as described in NP EN ISO 12099. With the results achieved allow us to conclude that the reliability of the validation process is dependent on the type of equipment used: The portable MicroNIR probe, which works in a reduced wavelength range, led to less robust results than those achieved with the NIR DS2500 whose working range is similar to the reference equipment. On the other hand, other factors, such as the characteristics of the raw material (color, homogeneity, etc.) or the parameters analyzed (ash, fiber, etc.) also affect the quality of the validation. The conclusion reached at the end of this project is that validation between similar equipment and with identical spectra, similar wavelengths, is much easier, when compared to the validation of equipment with different spectrums and variation in shorter wavelengths. This type of validation takes a certain amount of time to carry out since it is necessary to analyze and collect data from many samples and because the validation is not just about the sample itself, but also about all the parameters that are intended to be analyzed. The validation of NIR equipment belonging to Valnutri was successfully validated for samples and parameters that were presenting incongruent results when compared with those obtained on the reference equipment. The results presented are those that were possible taking into account Raçaalto's history and needs.
This project, carried out within the scope of the master's degree in Quality Management and Food Safety, aimed to validate NIR (Near Infrared Spectroscopy) equipment for use in quality control in compound feed factories of the Valnutri group. NIR technology allows a quick and reliable analysis of numerous interesting parameters for controlling the quality of compound feed, as well as the raw materials used in their production. It was stipulated by Valnutri's quality department that the analytical parameters evaluated in the samples are the contents of protein, fiber, fat, moisture, starch, ash and calcium. The high demand for samples to be analyzed daily, in order to guarantee the quality of raw materials received in factories as well as compound feeds for animals, during their production and until the final product, makes it unaffordable to evaluate the proximate composition of foods by classical or reference methods. As an alternative, NIR technology, Near Infrared Spectroscopy, emerged, which allows the quantification of all these parameters in real time in a simple, fast and economical way. If any irregularity occurs, it is quickly detected, which allows solutions to be found more efficiently and appropriately, avoiding not only irregularities in the final product, but also possible customer complaints and economic losses. For the quality control process to be reliable, it is extremely important that the results from analyzes using NIR equipment are robust and present a considerable level of confidence. To this end, it is necessary to validate the NIR equipment with the reference equipment. In this work, the NIR DS2500 (FOSS) equipment and the portable MicroNIR probe (ABVista) were validated, using the NIR MPA II (Bruker) as reference. The validation procedure was based on the statistical analysis of the results (n=20) attained from different products (feed and raw materials) and different nutritional parameters, as described in NP EN ISO 12099. With the results achieved allow us to conclude that the reliability of the validation process is dependent on the type of equipment used: The portable MicroNIR probe, which works in a reduced wavelength range, led to less robust results than those achieved with the NIR DS2500 whose working range is similar to the reference equipment. On the other hand, other factors, such as the characteristics of the raw material (color, homogeneity, etc.) or the parameters analyzed (ash, fiber, etc.) also affect the quality of the validation. The conclusion reached at the end of this project is that validation between similar equipment and with identical spectra, similar wavelengths, is much easier, when compared to the validation of equipment with different spectrums and variation in shorter wavelengths. This type of validation takes a certain amount of time to carry out since it is necessary to analyze and collect data from many samples and because the validation is not just about the sample itself, but also about all the parameters that are intended to be analyzed. The validation of NIR equipment belonging to Valnutri was successfully validated for samples and parameters that were presenting incongruent results when compared with those obtained on the reference equipment. The results presented are those that were possible taking into account Raçaalto's history and needs.
Description
Keywords
Infravermelho NIR Validação Controlo de qualidade Indústria