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New Reusable Solid Biosensor with Covalent Immobilization of the Horseradish Peroxidase Enzyme: In Situ Liberation Studies of Hydrogen Peroxide by Portable Chemiluminescent Determination.
ACS Omega ( IF 3.7 ) Pub Date : 2020-01-27 , DOI: 10.1021/acsomega.9b03958
Sara Bocanegra-Rodríguez 1 , Neus Jornet-Martínez 1 , Carmen Molins-Legua 1 , Pilar Campíns-Falcó 1
Affiliation  

Herein, we reported a chemiluminescent biosensor based on the covalent immobilization of the horseradish peroxidase (HRP) enzyme on a polydimethylsiloxane (PDMS) support to quantify in situ hydrogen peroxide (H2O2). The chemiluminescent reaction based on the use of luminol as an oxidizable substrate, with HRP as the catalyst, has been used in order to quantify H2O2 as the oxidizing agent. The performance of the proposed biosensor has been demonstrated to determine H2O2 liberated by cells in a culture medium and for evaluating the delivery of H2O2 from denture cleaner tablets, as examples of application. For both analyses, the results indicated that the biosensor is cost-effective, sensitive, and selective with a detection limit of 0.02 μM and good linearity over the range 0.06-10 μM. Precision was also satisfactory (relative standard deviation, % RSD < 6). The strength of this biosensing system is the simplicity, portability, and reusability of the devices; it can be applied up to 60 times with 90% of its activity maintained.

中文翻译:

共价固定辣根过氧化物酶的新型可重复使用的固体生物传感器:通过便携式化学发光法测定过氧化氢的原位释放研究。

在本文中,我们报告了一种化学发光生物传感器,其基于辣根过氧化物酶(HRP)酶在聚二甲基硅氧烷(PDMS)载体上的共价固定化来定量过氧化氢(H2O2)。为了定量作为氧化剂的H2O2,已经使用了基于以鲁米诺为可氧化底物并以HRP为催化剂的化学发光反应。作为应用实例,已经证明了所提出的生物传感器的性能可确定培养基中细胞释放的H2O2,并评估义齿清洁剂片剂中H2O2的递送。对于这两种分析,结果均表明该生物传感器具有成本效益,灵敏性和选择性,检测极限为0.02μM,在0.06-10μM范围内具有良好的线性。精度也令人满意(相对标准偏差,%RSD <6)。这种生物传感系统的优势在于设备的简单性,便携性和可重用性。在保持其90%的活性的情况下,最多可施用60次。
更新日期:2020-02-11
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