Prospecção Tecnológica sobre Embalagens Ativas para Alimentos

Active packaging is a tool used by the food industry to maintain quality and increase the useful life of its products.  The analysis of patents and scientific articles related to this topic is essential to outline the profile of scientific productions and the generation of new products. This research was carried out spanning the period from 2011 to 2020 on the Scopus, Web of science, Science direct and Scielo databases. Technological prospection encompassed the Espacenet and Wipo databases, using the keywords “active packaging” and “active packaging food”, evaluating year of publication, location and area/category. USA. China and Spain had the highest number of articles publications, respectively, with the USA being the largest patent applicant. Despite the existence of several products on the international market with this technology, many publications were found, indicating that there is competitiveness problem and the need for development of new technologies.As embalagens ativas são ferramentas utilizadas pela indústria alimentícia com o intuito de manter a qualidade e aumentar a vida útil dos seus produtos. A análise de patentes e de artigos relacionados a esse tema é fundamental para traçar o perfil das produções científicas e a geração de novos produtos. Desse modo, as buscas foram realizadas fixando o período de 2011-2020, em diferentes bases de artigos (Scopus, Web of Science, Science Direct e Scielo) e patentes (Espacenet e WIPO), utilizando as palavras-chave “active packaging” e “active packaging food”, avaliando-se ano de publicação, localidade e área/categoria. EUA, China e Espanha apresentaram maior número de publicações de artigos, respectivamente, sendo os EUA o maior depositante de patentes. Apesar da existência de diversos produtos no mercado internacional com essa tecnologia, encontrou-se elevado número de publicações, indício de que há competitividade e necessidade de desenvolvimento de novas tecnologias.

Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu2+ and Pb2+ in Water Samples

The use of nanomaterials, such as nanoparticles and nanotubes, for electrochemical detection of metal species has been investigated as a way of modifying electrodes by electrochemical stripping analysis. The present study develops a new methodology based on a comparative study of nanoparticles and nanotubes with differential pulse anodic stripping voltammetry (DPASV) and examines the simultaneous determination of copper and lead. The glassy carbon electrode modified by gold nanoparticles demonstrated increased sensitivity and decreased detection limits, among other improvements in analytical performance data. Under optimized conditions (deposition potential −0.8 V versus Ag/AgCl; deposition time, 300 s; resting time, 10 s; pulse amplitude, 50 mV; and voltage step height, 4 mV), the detection limits were 0.2279 and 0.3321 ppb, respectively, for determination of Pb2+ and Cu2+. The effects of cations and anions on the simultaneous determination of metal ions do not exhibit significant interference, thereby demonstrating the selectivity of the electrode for simultaneous determination of Pb2+ and Cu2+. The same method was also used to determine Cu2+ in water samples