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Precise capillary flow for paper-based viscometry

  • Emanuel Elizalde
  • Raúl Urteaga
  • Claudio L. A. Berli
Research Paper

Abstract

The imbibition dynamics of aqueous solutions in paper substrates determines the performance of all the operations integrated in analytical paper-based devices. In particular, an accurate control of the flow rate is required for quantitative analysis such as viscometry. This work experimentally investigates paper filling dynamics in order to find a strategy to improve the precision and predictability of the imbibition process. The effect of performing successive wetting–drying cycles on the same strips is explored, since we have discovered that, after around four cycles, the filling kinematics is highly repetitive, and data closely follow the theoretical Lucas–Washburn model. It is found that the cyclic process enables quantitative assessment of the filling dynamics with uncertainties lower than 0.8 %. Implementing this protocol, paper-based viscometry with a precision around 1 % was experimentally demonstrated. This knowledge is of interest to develop paper-based microfluidic devices with a new level of precision.

Keywords

Paper-based microfluidics Capillary filling Viscometry 

Notes

Acknowledgments

The authors thank the financial support received from the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and the Universidad Nacional del Litoral (UNL), Argentina.

Supplementary material

10404_2016_1800_MOESM_ESM.pdf (2.1 mb)
Supplementary material 1 (pdf 2101 KB)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Emanuel Elizalde
    • 1
  • Raúl Urteaga
    • 1
  • Claudio L. A. Berli
    • 2
  1. 1.IFIS-LitoralUNL-CONICETSanta FeArgentina
  2. 2.INTECUNL-CONICETSanta FeArgentina

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