Food Analytical Methods

, Volume 9, Issue 4, pp 1046–1052 | Cite as

Smartphone-Based Extension of the Curcumin/Cellophane pH Sensing Method

  • Mária Pávai
  • Eszter Orosz
  • András Paszternák


Smartphone-based extension of the previously published (Food Anal Meth doi:10.1007/s12161-015-0102-1 2015a) curcumin-coloured cellophane test strip pH sensing method is reported. Replacement of the ultraviolet-visible (UV–VIS) spectrophotometer with an android-based device can reach a wider audience, in accordance with the ongoing, significant increase in the field of smartphone-based analytical applications. On the basis of the colouring effect of curcumin on biopolymers, a new, qualitative, quick and low-cost method for pH determination is developed, which provides more sensitive detection than the bare eye checking. Next to cellophane substrate, curcumin/gelatine sensor arrays are studied, too. Food-industrial and health-care products are targeted with a modular system based on the curcumin-coloured cellophane/gelatine sensor array, a free android application running on a smartphone, together with a home-written data analyser software. In situ monitoring and local pH mapping in liquid cell, investigation with curcumin dotted cellophane array and long-time stable, dried curcumin-coloured gelatine capsules are discussed.


Smartphone pH Curcumin Cellophane Gelatine Sensor array 


Compliance with Ethical Standards

Conflict of Interest

Mária Pávai declares that she has no conflict of interest. Eszter Orosz declares that she has no conflict of interest. András Paszternák declares that he has no conflict of interest.

Ethical Approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed Consent

Not applicable.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Mária Pávai
    • 1
  • Eszter Orosz
    • 1
  • András Paszternák
    • 1
  1. 1.Institute of Materials and Environmental Chemistry, Research Centre for Natural SciencesHungarian Academy of SciencesBudapestHungary

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