We report a novel amperometric sensor for aqueous phosphate ions in freshwater systems based on the reductive square wave voltammetry of molybdate(VI) anions immobilized within a chitosan matrix deposited on a glassy carbon electrode. A sensitivity of 4.4 ± 0.1 μA/μM was realized together with a LOD of 0.15 μM. The sensor was insensitive to chloride and nitrate ions below a threshold concentration of 1.0 mM. Analytical measurements were successfully made in authentic samples of tap and pond water.

中文翻译：

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电流型环境磷酸盐传感器

我们报告了一种用于淡水系统中磷酸根离子水溶液的新型电流传感器，该传感器基于固定在玻璃碳电极上的壳聚糖基质中的钼酸盐 (VI) 阴离子的还原方波伏安法。实现了 4.4 ± 0.1 μA/μM 的灵敏度和 0.15 μM 的 LOD。该传感器对低于 1.0 mM 阈值浓度的氯离子和硝酸根离子不敏感。在自来水和池塘水的真实样品中成功进行了分析测量。