Formaldehyde-sensitive sensor based on recombinant formaldehyde dehydrogenase using capacitance versus voltage measurements

A novel formaldehyde sensor based on the pseudocapacitive catalysis of birnessite

“…Among them, electrochemical approaches are advantageous with respect to low cost, high sensitivity, stability, and the capabilities for on-site and in real-time measurements with a small volume of the analyte. The electrochemical detection of FA in solution can be classified into two types: one is based on the electrodes modified with novel metals such as Au, Pt, and Pd [1][2][3][4][5]; the other consists of biological components such as formaldehyde dehydrogenase (FDH) and alcohol oxidase (AOX) [6][7][8][9][10][11][12][13]. The former substances are not only expensive, but they are also good catalysts for oxidation of other small organic molecules such as methanol and formic acid.…”

Preparation of platinum nanoparticles on polyaniline-coat multi-walled carbon nanotubes for adsorptive stripping voltammetric determination of formaldehyde in aqueous solution

“…1.13 9 10 -4 C(M) (R = 0.999; LOD = 2.1 9 10 -10 M, 3 9 r; SOD = 1.13%, n = 5). Table 1 summaries the results of various method for HCHO sensing [4][5][6][7][8][29][30][31][32]. In comparison with the reported results such as biosensors, semiconductor sensors, and odor sensor, the present work shows a better sensitivity (Table 2).…”

“…All these facts convincingly demonstrate the requirement for accurate HCHO determination. Some attempts were reported to develop HCHO sensors due to its electrochemical activity with Pt, Ru, and Au electrocatalysts [4][5][6][7][8]. The electric polyaniline supporting nano-Pt and Pd were involved to develop HCHO fuel cell [4,[9][10][11][12][13][14][15].…”

Formaldehyde Oxidizing Enzymes and Genetically Modified Yeast Hansenula polymorpha Cells in Monitoring and Removal of Formaldehyde

“…Recombinant yeast FdDH was used as a FA-recognising element coupled with semiconductor-based structure Si/SiO 2 /Si 3 N 4 as a transducer (Ben Ali et al, 2007). The bio-recognition element had a bi-layer architecture and consisted of FdDH, crosslinked with albumin, and two cofactors (NAD + and GSH) in the high concentrations (first layer); the second layer was a negatively charged Nafion membrane which prevented a leakage of negatively charged cofactors from the bio-membrane.…”

“…As can be seen from Tables 9 and 10 Reference Khlupova et al, 2007Korpan et al, 2000Demkiv et al, 2008 * Oxygen consumption rate per 1 mM of FA (μM O2 s -1 · mM -1 ) , Smutok et al, 2006, Ben Ali et al, 2007. FdDH-based biosensors have very important property for FA analysis in real samples -high selectivity to FA, compared with AOX-and cells-based sensors (Gayda et al, 2008).…”