Journal
TALANTA
Volume 174, Issue -, Pages 493-499Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2017.06.041
Keywords
Copper; Porphyrin derivatives; Colorimetric detection; Microfluidic paper-based analytical device; Distance-based detection
Categories
Funding
- Ministry of Research, Technology and Higher Education, Republic of Indonesia through PMDSU scholarship
- Hibah PMDSU Batch 1
- National Science Foundation through Access Sensor Technologies [1415655]
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [1415655] Funding Source: National Science Foundation
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Meso-tetrakis(1,2-dimethylpyrazolium-4-yl)porphyrin sulfonate (TDMPzP), a water-soluble porphyrin derivative, was synthesized and used as a colorimetric reagent for Cu2+ detection on a microfluidic paper-based analytical device (mu PAD) using distance-based quantification. TDMPzP showed a high selectivity for Cu2+ detection in aqueous solutions. When Cu2+ was added to the TDMPzP under acidic conditions, a color change from green to a pink was observed by the naked eye. Under optimized conditions, the application of this system to a distance-based mu PAD exhibited good analytical response. The presence of common metal ions (Al3+, Fe3+, Mg2+, Co2+, Mn2+, Zn2+, Pb2+, Cd2+, Sn2+, and Ni2+) did not interfere with Cu2+ detection within reasonable tolerance ratios. The lowest concentration of copper that could be measured was 1 mg L-1 (1 ppm) which meets the requirements for drinking water contamination regulations from the US Environmental Protection Agency (EPA) and World Health Organization (WHO) guidelines for drinking water. Real drinking water samples were analyzed to confirm the practical application of this system and the results showed good agreement with ICP-MS data. This distance-based mu PAD based on TDMPzP for Cu2+ detection is convenient and effective for real-time drinking water analysis.
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