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Issue 16, 2019
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The spin-coating-based immobilization of ZnTPP-dyed cation exchange resin microbeads for reversible ammonia detection

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Abstract

During the fabrication of a microfluidic chip for reversible ammonia detection, we applied a spin-coating-based method to immobilize cation exchange resin microbeads on which zinc tetraphenylporphyrin was dyed as an indicator material. The 4-layered microfluidic chip and a portable spectrometer constituted the core part of the integrated system. The results obtained for various wavelengths were compared, and the spectral intensity change at 450 nm was selected. The PDMS films at 2000–5000 rpm were investigated at ammonia concentrations ranging from 0.5 to 50 mg L−1. The reversibility of zinc tetraphenylporphyrin was assessed by the results obtained after each cycle. After conducting the tests 75 times for various microfluidic chips, the stability of the method was confirmed with the maximal relative deviation being less than 10%. The introduced method exhibited significant potential for the detection of ammonia.

Graphical abstract: The spin-coating-based immobilization of ZnTPP-dyed cation exchange resin microbeads for reversible ammonia detection

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Publication details

The article was received on 22 Jan 2019, accepted on 12 Mar 2019 and first published on 18 Mar 2019


Article type: Paper
DOI: 10.1039/C9AY00171A
Citation: Anal. Methods, 2019,11, 2155-2162

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    The spin-coating-based immobilization of ZnTPP-dyed cation exchange resin microbeads for reversible ammonia detection

    H. Zhou, Z. Yang and K. Cen, Anal. Methods, 2019, 11, 2155
    DOI: 10.1039/C9AY00171A

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