Research Article Open Access

Influence of Temperature and pH on the Stability and Colorimetric Measurement of Textile Dyes

A.S. Mahmoud1, A.E. Ghaly1 and S.L. Brooks1
  • 1 Dalhousie University Halifax, Canada


Most of the textile dye removal techniques operate within temperature and pH ranges of 20-60°C and 2-12, respectively. Both the pH and temperature have been reported to have significant effects on the efficiencies of the dye removal techniques. In this study, the effects of pH and temperature on the stability and color measurement (absorbance) of the textile dye remazol brilliant at different dye concentrations were investigated. Changing the pH from 1 to 13 and /or the temperature from 15 to 55°C did not have any significant effect on the absorbance of the dye remazol brilliant blue at two concentrations (65 and 300 mg L). The results showed the stability of the remazol brilliant blue in water under wide ranges of temperature and pH. However, the neutral compound C22H16N2Na2O11S3 is transformed to an ionic form with either negative charge C22H15N2Na2O11S3]- under alkaline condition or positive charge [C22H15N2Na2O11S3]+ under acidic condition. The formation of ionic form of the dye will facilitate its removal by various removal techniques. The results showed that a standard curve can be constructed at ambient conditions (a pH of 7 and a temperature of 25°C) and used to determine the concentration of the dye using the colorimetric method.

American Journal of Biochemistry and Biotechnology
Volume 3 No. 1, 2007, 33-41


Published On: 31 March 2007

How to Cite: Mahmoud, A., Ghaly, A. & Brooks, S. (2007). Influence of Temperature and pH on the Stability and Colorimetric Measurement of Textile Dyes. American Journal of Biochemistry and Biotechnology, 3(1), 33-41.

  • 53 Citations



  • Remazol brilliant blue
  • reactive dye
  • pH
  • temperature
  • colourimetric measurement
  • absorbance
  • stability