基于纸基微流控芯片快速检测饮用水中铬(VI)含量

Quick detection of chromium (VI) content in drinking water based on paper-based microfluidic chip

中文关键词:  纸芯片，铬(VI),饮用水

英文关键词:paper-based microfluidic chips  chromium (VI)  drinking water

中文摘要:

      目的 建立一种可以在纸基微流控芯片上快速检测饮用水中铬(VI)的方法。方法 将普通中性笔进行改装, 在笔芯中灌注烷基烯酮二聚体溶液, 然后利用在滤纸上直接绘制的方法制作纸芯片, 干燥后在此纸芯片上检测铬(VI)。实验优化了硫酸溶液浓度、二苯碳酰二肼浓度、反应温度、反应时间等参数。结果 本研究检测铬的线性范围为0~0.20 mg/L, 检出限为0.0036 mg/L, 加标回收率为97.7%~109.0%。其线性范围宽, 灵敏度高, 重复性好。结论 该方法操作简单、结果准确, 不需要昂贵复杂的大型仪器, 对于多样品的同时检测及现场即时检测具有适应性。

英文摘要:

      Objective To construct a method for rapid detection of chromium (VI) in drinking water on a paper-based microfluidic chip. Methods The paper chips were manufactured by directly drawing on filter paper with a modified gel pen filled with alkylketene dimmer solution and then dried. The chromium (VI) was detected on the paper chips. Parameters influencing the chromium (VI) determination were investigated, including concentration of sulfuric acid solution and diphenyl carbamide solution, reaction time, and temperature. Results In this study, the linear range of chromium detection was 0~0.20 mg/L, the detection limit was 0.0036 mg/L, and the recovery rate was 97.7%~109.0%. It had wide linear range, high sensitivity and good repeatability. Conclusion The method has the advantages of simple operation and the accurate detection result, does not require expensive and complex large instruments, and has adaptability to simultaneous detection of multiple samples and on-site real-time detection.