Autenticação de origem geográfica de cachaças da Paraíba utilizando espectroscopia portátil NIR e RAMAN ACOPLADA com DD-SIMCA

Abstract

Sugar cane brandy is a distilled alcoholic beverage that is typically Brazilian, produced from the fermentation and distillation of sugarcane juice. Its history and cultural influence have granted it worldwide recognition as a symbol of Brazilian culture. Recognized for its historical and cultural value, sugar cane brandy also represents an important export product. Thus, the geographical authentication of this beverage assumes great economic and cultural relevance, as it contributes to the valorization of heritage while protecting both consumers and producers. Traditionally, the authentication of sugar cane brandy was performed through organoleptic techniques, however, technological advances and the need for a more detailed understanding of its chemical and sensory components have driven the development and application of new techniques for analysis and authentication. Therefore, this study aims to apply different spectroscopic techniques, such as near-infrared (NIR) and Raman spectroscopy, using portable equipment, to authenticate sugar cane brandy samples produced in the state of Paraíba. These analytical techniques, when combined with one-class chemometric methods such as DD-SIMCA (Data-Driven Soft Independent Modeling of Class Analogy), proved capable of accurately classifying these beverages, identifying them as belonging to a specific group. It was possible to achieve an accuracy of 64.80% using NIR data, with a sensitivity of 88.90% and specificity of 60.00%, where the best preprocessing method was baseline correction (offset). Raman spectroscopy, on the other hand, stood out by reaching an accuracy of 98,10%, with sensitivity of 100% and specificity of 97.80%, with multiplicative scatter correction being the best preprocessing method. These results highlight the potential of these tools to ensure the authenticity and geographical differentiation of sugar cane brandy, as they provide fast, non-destructive, and reliable analyses, thereby promoting greater product valorization and the consolidation of cultural identity.