P1MM.1 - Development of a Polymer Inclusion Membrane Incorporated in a Microfluidic Paper-Based Sensor for the Determination of Cu(II)
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- P-1 - Microfluidics and MEMS for Sensing
- L. Sibal, L. dlC. Coo - Institute of Chemistry, University of the Philippines, Diliman, Quezon City (Philippines), R. Camitan, D. Yabut, B. Rivera - Philippine Council for Industry, Energy and Emerging Technology Research and Development (PCIEERD), Department of Science and Technology, Science Community Complex, Bicutan, Taguig City (Philippines)
- 564 - 565
A polymer inclusion membrane (PIM) incorporated in a microfluidic paper-based sensor (μPBS) was prepared for the optical determination of copper in water samples. The PIM composition needed to achieve high selectivity and sensitivity for the analytical determination of Cu(II) ions was optimized. It was composed of 8 wt% dioctyl phthalate, 51.5 wt% poly(vinyl chloride), 40 wt% di-(2-ethylhexyl) phosphoric acid and 0.5 wt% 2-(2-thiazolylazo)-p-cresol (TAC). TAC reacts with Cu(II) producing a green-colored complex. The μPBS was produced by laminating a stack of the PIM and two layers of preconditioned filter paper. High reactivity and selectivity of the μPBS was observed at pH 3.0. The proposed method has a limit of detection (LOD) of 0.05 mg/L and a limit of quantitation (LOQ) of 0.16 mg/L. The optimized μPBS was successfully used in determining the Cu(II) concentrations in river water samples with no significant difference from results obtained using atomic absorption spectroscopy.