Journal of Textile Science & Engineering

Department of Polymer and Textile Engineering, Federal University of Technology Owerri, Imo State, Nigeria

Publications

• Research   
  Acid-Base Indicator Properties of Dye from Local Plant: The Rosella Calyces (Hibiscus Sabdariffa)
  Author(s): Onuegbu Genevieve, Nnorom Onyekachi, Okonkwo Samuel Nonso* and Ojiaku Pascal
  
  The dye from the Calyces Hibiscus sabdariffa (Zobo) was extracted and used as acid-base indicator for the standardization of acid and determination of the molar masses of some selected acids. The Calyces Hibiscus sabdariffa was peeled, washed and heated in an oven at 60°C. It was ground into powder and soaked in hot and cold ethanol for the extraction. Part of the extract was filtered and concentrated by subjecting the extract to slow heating which yielded 1.5 kg of the Hibiscus sabdariffa indicator. Hot and cold extracts of the Hibiscus sabdariffa were used for the standardization of acid with 0.03 M concentration of the bases. On the preliminary test carried out on basic medium, the calyces Hibiscus sabdariffa indicator turned red in acidic condition and green in basic medium, both hot and cold indicators yielded sharp and intense col.. Read More»
  DOI: 10.37421/2165-8064.2020.10.409

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