高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (9): 1628.

• 研究论文 • 上一篇    下一篇

连续进样的重力驱动微流控芯片流动分析系统

黄艳贞, 方群, 李丹妮   

  1. 浙江大学化学系, 微分析系统研究所, 杭州310028
  • 收稿日期:2003-12-08 出版日期:2004-09-24 发布日期:2004-09-24
  • 基金资助:

    国家自然科学基金重大项目(批准号:20299030);国家“八六三”计划(批准号:2002AA2Z2042);教育部科学技术研究重点项目(批准号:01093)资助

A Flow Analysis System Based on Microfluidic Chip with Continuous Sample Introduction and Gravity-driven Flows

HUANG Yan-Zhen, FANG Qun, LI Dan-Ni   

  1. Institute of Microanalytical Systems, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
  • Received:2003-12-08 Online:2004-09-24 Published:2004-09-24

摘要: 建立了一种可连续进样的集成化重力驱动微流控芯片流动分析系统.该系统可实现连续高通量引入试样,换样时间仅为15s;还采用了水平贮液池和出口引流管等重力驱动流体控制技术,显著降低了试剂和样品的消耗,提高分析速度,增加系统连续工作时间.利用Luminol-K3[Fe(CN)6]-H2O2化学发光体系考察了该系统的分析性能,系统对不同试样的分析速度达80~100样/h,对H2O2检测的线性范围为1×10-6~1×10-4mol/L,检出限为2.0×10-7mol/L,RSD为0.3%(n=5).

关键词: 微流控芯片, 重力驱动, 连续换样, 化学发光检测

Abstract: An integrated microchip analytical system with gravity-driven flow was developed, equipped a novel continuous sample introduction interface with cannula configuration, featuring high sampling throughput(80-100 samples/h), low sample and reagent consumption and long continuous working time. Stable and fast flow rate for the streams of sample and reagents in microchannel of the chip were achieved by the use of horizontally oriented reservoirs and stretched outlet tubing, respectively.The performance of the system was tested by using H2O2 as a model sample with chemiluminescence detection by the luminol-K3[Fe(CN)6]-H2O2 reaction, achieving a good precision of 0.3%(RSD, n=5), a carryover of 1.1% for sample changing and a detection limit of 2.0×10-7 mol/L.

Key words: Microfluidic chip, Gravity-driven flow, Continuous sample introduction, Chemiluminescence detection

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