Analytical Potentials of Dye Extracts from Urena Lobata (Mgbo) Flowers
作者: Sunday O. EzeRose A. Ogbuefi
作者单位: 1Department of Pure and Industrial Chemistry, Abia State University, PMB 2000, Uturu, Nigeria
刊名: Communications in Applied Sciences, 2014, Vol.2 (1)
来源数据库: Infinity Press
原始语种摘要: Indicators used in titrations show well-marked changes of color in certain intervals of pH. Most of these indicators are organic dyes and are of synthetic origins. The present study was designed to evaluate the extracts of a flower from a plant that is easily available. The analytical potentials of ethanol, cold water, and hot water extracts of dyes from the flowers of a common plant, Urena lobata were evaluated. 3 drops of the dye extract were dropped in 10ml of 0.1M H2SO4. This was titrated against 0.1M NaOH until the colour changed from light pink to light orange at equivalent point. The titration was repeated using standard indicators such as phenolphthalein, methyl orange, bromothymol blue and methyl red for weak acid strong base, strong acid strong base, strong...
全文获取路径: Infinity Press  (合作)

  • titration 滴定
  • synthetic 合成的
  • potentiometric 电势测定的
  • extracts 摘记
  • drops 沉积岩侵入漏斗状体
  • indicators 指示器
  • methyl 甲基
  • flowers 
  • dropped 降下
  • strong