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首页> 外文期刊>Journal of the Brazilian Chemical Society >Sweet potato tissue-epoxy resin composite biosensor for hydroquinone determination in photographic process wastewater
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Sweet potato tissue-epoxy resin composite biosensor for hydroquinone determination in photographic process wastewater

机译：甘薯组织-环氧树脂复合生物传感器测定照相工艺废水中的对苯二酚

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A biosensor of graphite-epoxy resin-sweet potato tissue (source of polyphenol oxidase) was developed in this work. The evaluated compositions of graphite-epoxy resin-vegetable tissue were varied from 30 to 80% (m/m) graphite; from 5 to 60% (m/m) epoxy resin and from 5 to 20% (m/m) tissue. The cyclic and linear sweep voltammograms were obtained at a scan rate between 25 and 300 mV s-1 in the pH range from 3 to 8 in 0.1 mol L-1 phosphate buffer solutions. Several phenolic compounds were determined by the proposed biosensor and hydroquinone was determined in wastewater from photographic process. Relative standard deviations of 0.7% and 3.3% were obtained employing the same biosensor (n=10) and three different biosensors (n=10), respectively. Sensitivity and selectivity were evaluated employing the biosensor for hydroquinone with a lifetime of at least 6 months (more than 500 determinations).
机译：在这项工作中，开发了一种石墨-环氧树脂-红薯组织（多酚氧化酶的来源）的生物传感器。所评估的石墨-环氧树脂-植物组织的组成在30％至80％（m / m）的石墨之间变化。 5至60％（m / m）的环氧树脂和5至20％（m / m）的薄纸。在0.1 mol L-1磷酸盐缓冲溶液中，在3至8的pH范围内，扫描速率在25至300 mV s-1之间获得循环和线性扫描伏安图。拟议的生物传感器测定了几种酚类化合物，照相过程中的废水中也测定了对苯二酚。分别使用相同的生物传感器（n = 10）和三个不同的生物传感器（n = 10）可获得0.7％和3.3％的相对标准偏差。使用生物传感器对氢醌的灵敏度和选择性进行了评估，使用寿命至少为6个月（超过500次测定）。

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