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International Journal of Interdisciplinary Research

Table 6 Experimentation on % purity of indigo dye

From: Extraction of Indigo dye from Couroupita guianensisand its application on cotton fabric

Trials Vol. of sample solution (ml) Burette reading (Vol. of KMnO4) ml
1 20 3.5
2 20 3.6
3 20 3.6
  1. Constant burette reading (Vol. of KMnO4) : 3.6 ml.
  2. End point indication: appearance of pale yellow.