Food Analytical Methods

, Volume 8, Issue 9, pp 2243–2249 | Cite as

pH and CO2 Sensing by Curcumin-Coloured Cellophane Test Strip

  • Mária Pávai
  • Judith Mihály
  • András Paszternák


Curcumin-coloured cellophane test strip—fabricated without any synthetic material—is used to determine in situ the instantaneous pH changes in liquids and in the air. A low-cost, portable sensor array for possible medical and food–industrial application is developed. Next to the pH detection, curcumin-coloured test strip can be applied as CO2 monitoring sensor, too. Ongoing processes and the structural changes are followed by ultraviolet-visible (UV-VIS) spectrophotometer, attenuated total reflection-fourier transform infrared spectroscopy (ATR-FTIR) and atomic force microscope (AFM).


pH sensor Curcumin Cellophane CO2 Medical application Food quality 


Compliance with Ethics Requirements

This article does not contain any studies with human or animal subjects.

Conflict of Interest

Mária Pávai declares that she has no conflict of interest. Judith Mihály declares that she has no conflict of interest. András Paszternák declares that he has no conflict of interest.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Mária Pávai
    • 1
  • Judith Mihály
    • 1
  • András Paszternák
    • 1
  1. 1.Research Centre for Natural Sciences, Hungarian Academy of SciencesInstitute of Materials and Environmental ChemistryBudapestHungary

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