2026-01-272026-01-272018-11-09NUNES, Diego Ribeiro. extrato hidroalcoólico obtido a partir da flor da espécie Macroptilium lathyroides (L.) Urb como indicador ácido- base. Orientador: Leandro Marques Correia. 2018. 35 f. Trabalho de Curso (Licenciatura em Ciências Naturais) – Faculdade de Ciências Naturais, Campus Universitário de Breves, Universidade Federal do Pará, Breves, 2018. Disponível em: https://bdm.ufpa.br/handle/prefix/9125. Acesso em: .https://bdm.ufpa.br/handle/prefix/9125The Macroptilium lathyroides (L.) Urb flower, popular known as wild bushbean, is a legume originated in the tropical South America. The species is a vine that belongs to a legume family and subfamily papilionaceae. At the same time, the flower of this specie emerges as raw material for obtaining an hydroalcoholic extract that can be used as an identifier of acids and bases in daily life. The objective of this work was to obtain the alcoholic extract from the crude mass of M. lathyroides (L.) Urb petals and use it as natural acid-base indicator. The experimental methodology of the present work was developed in fives stages: (i) development of a pH range (0-14), (ii) obtainment of a pH paper from the alcoholic extract, (iii) identification of acid and base substances used in daily life with the extract and pH indicator paper (iv) determination of acetic acid in commercial vinegars, and (v) comparison with a synthetic indicator (phenolphthalein). For all the steps, the hydroalcoholic extract of M. lathyroides (L.) Urb was efficient, obtaining excellent results. In this way, the obtainment of the extract and pH indicator paper has a low cost and can be used as an acid-base indicator, being a feasible option for synthetic indicators, since those have a high commercial value.Acesso AbertoMacroptilium lathyroides (L.) UrbExtrato hidroalcoólicoIndicador NaturalHydroalcoholic extractNatural indicatorCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICATrabalho de Curso - Graduação - MonografiaAttribution-NonCommercial-NoDerivs 3.0 Brazil