Abstract
Background: Biocompatible and easily available immobilization matrix is vital for the construction of enzyme-based biosensor.
Methods: Reed membrane was selected as a novel immobilization matrix to construct an optical phenol biosensor. Tyrosinase from mushroom was immobilized in a reed membrane using glutaraldehyde as a cross-linker. The detection scheme was based on the measurement of the color intensity of the adduct resulting from the reaction of 3-methyl-2-benzothiazolinone hydrazone (MBTH) with the quinone produced from the oxidation of phenol by tyrosinase. The performance of such method including specificity, sensitivity, repeatability and practical use were validated.
Results: The prepared biosensor demonstrated optimum performance at pH 6-7, temperature of 40°C and a linear response in the phenol concentration range of 5-100 μM. It also showed good operation stability for repeated measurements (over 200 times) and good storage stability after it had been kept at 4°C for 2 months.
Conclusion: Reed membrane is a novel matrix for immobilization of enzyme. The prepared biosensor permits good sensitivity, reproducibility and stability. It is anticipated that reed membrane is a promising solid support for fabricating other enzyme-based biosensors.
Keywords: Biomaterial, biosensor, enzyme immobilization, phenol detection, reed membrane, tyrosinase.
Graphical Abstract
[http://dx.doi.org/10.1080/00032719908542597]
[http://dx.doi.org/10.1021/ac00061a004]
[http://dx.doi.org/10.1039/c0an00353k] [PMID: 20852777]
[http://dx.doi.org/10.1016/S0003-2670(99)00071-9]
[http://dx.doi.org/10.1016/S0039-9140(02)00540-4] [PMID: 18968938]
[http://dx.doi.org/10.1016/j.snb.2005.06.019]
[http://dx.doi.org/10.1016/j.aca.2008.02.031] [PMID: 18358868]
[http://dx.doi.org/10.1016/j.aca.2009.11.039] [PMID: 20103115]
[http://dx.doi.org/10.1016/j.ijbiomac.2017.08.114] [PMID: 28851635]
[http://dx.doi.org/10.1109/TNB.2017.2736781] [PMID: 28792903]
[http://dx.doi.org/10.1016/j.ab.2005.11.017] [PMID: 16384546]
[http://dx.doi.org/10.1039/b103205b]
[http://dx.doi.org/10.1021/ac001097a] [PMID: 11871376]
[http://dx.doi.org/10.1016/j.bios.2005.08.004] [PMID: 16168632]
[PMID: 21313820]
[http://dx.doi.org/10.1016/j.enzmictec.2004.06.009]
[http://dx.doi.org/10.1016/S0003-2670(99)00143-9]
[http://dx.doi.org/10.1016/j.talanta.2005.12.061] [PMID: 18970803]
[http://dx.doi.org/10.1016/j.msec.2019.01.082] [PMID: 30889711]
[http://dx.doi.org/10.1016/j.bios.2019.03.008] [PMID: 30884314]