A single-use screen-printed carbon electrode strip was designed and fabricated. Nanohybrids, prepared by deposition of platinum (Pt) nanoparticles on multi-wall carbon nanotube (MWCNT), was modified on the surface of screen-printed carbon electrode for the development of a fast, sensitive and cost-effective hydrogen peroxide (H2O2) detection amperometric sensor strip. With Pt-MWCNT nanohybrids surface modification, current generated in response to H2O2 by the screen-printed carbon electrode strip was enhanced 100 fold with an applied potential of 300 mV. Quality of as-prepared electrode strip was assured by the low coefficient of variation (CV) (<5%) of currents measured at 5 s. Three linear detection ranges with sensitivity of 75.2, 120.7, and 142.8 μA mM-1 cm-2 were observed for H2O2 concentration in the range of 1-15 mM, 0.1-1 mM, and 10-100 μM, respectively. The lowest H2O2 concentration could be measured by the as-prepared strip was 10 μM. H2O2 levels in green tea infusion and pressed Tofu could be rapidly detected with results comparable to that measured by ferrous oxidation xylenol orange (FOX) assay and peroxidase colorimetric method.

中文翻译：

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Pt-MWCNT修饰碳电极条用于食品中H 2 O 2 的快速定量检测

设计和制造了一次性丝网印刷碳电极条。通过在多壁碳纳米管 (MWCNT) 上沉积铂 (Pt) 纳米颗粒制备的纳米杂化物，在丝网印刷碳电极表面进行改性，用于开发快速、灵敏且具有成本效益的过氧化氢 (H2O2) 检测电流传感器条。通过 Pt-MWCNT 纳米杂化物表面改性，丝网印刷碳电极条响应 H2O2 产生的电流在 300 mV 的施加电压下提高了 100 倍。在 5 秒时测量的电流的低变异系数 (CV) (<5%) 保证了所制备电极条的质量。对于 H2O2 浓度范围为 1-15 mM、0.1-1 mM、和 10-100 μM，分别。所制备的试纸条可测量的最低 H2O2 浓度为 10 μM。可以快速检测绿茶浸液和压豆腐中的 H2O2 水平，其结果与亚铁氧化二甲酚橙 (FOX) 测定法和过氧化物酶比色法测定的结果相当。