In the face of worsening water quality and escalating water environmental emergencies, this study developed a paper-based microfluidic disk for rapid, on-site determination of ammonia nitrogen, nitrates, nitrites, and phosphates in water. The method utilizes centrifugal microfluidics and paper-based technology, thus simplifying the operation while eliminating the need for on-site reagent preparation. Experimental results demonstrate that the disk requires only 80 microliters of a water sample and 2 minutes to complete the quantitative analysis of the four nutrients, with a coefficient of variation below 1.72% and spike recoveries ranging from 92% to 113%. The development of the disk provides an effective and rapid, on-site testing tool for water quality analysis.

中文翻译：

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设计一种新型纸基微流控盘，用于快速、同时测定水中的多种营养盐


面对不断恶化的水质和不断升级的水环境紧急情况，本研究开发了一种纸基微流控盘，用于快速、现场测定水中的氨氮、硝酸盐、亚硝酸盐和磷酸盐。该方法利用离心微流体和基于纸张的技术，从而简化了操作，同时无需现场制备试剂。实验结果表明，该圆盘只需要 80 微升水样和 2 分钟即可完成四种营养物质的定量分析，变异系数低于 1.72%，加标回收率从 92% 到 113% 不等。圆盘的开发为水质分析提供了一种有效、快速的现场测试工具。