用于碟式微流控芯片的尿液生化检测系统研制及应用

孟永康; 雷祝兵; 梅茜; 董文飞

doi:10.37188/CO.2021-0067

用于碟式微流控芯片的尿液生化检测系统研制及应用

doi: 10.37188/CO.2021-0067

孟永康^{1, 2,},
雷祝兵^{2, 3,},
梅茜^2, ,,
董文飞^2,

1.
长春理工大学机电工程学院，吉林长春 130022
2.
中国科学院苏州生物医学工程技术研究所，江苏苏州 215163
3.
中国科学技术大学生物医学工程学院（苏州）生命科学与医学部，安徽合肥 230026

基金项目: 国家重点研发计划（No. 2020YFC4500）；国家自然科学基金项目（No. 21803075，No. 61805273，No. 81902166，No. 91959112，No. 62027825）；济南市“高校20条”资助项目（No. 2018GXRC016）；中国科学院院地合作项目（No. 2020SYHZ0041）

详细信息

作者简介:
孟永康（1995—），男，河南漯河人，硕士研究生，2018年于河南工程学院获得学士学位，主要从事机械工程等方面研究。E-mail：ykmeng1995@163.com

雷祝兵（1997—），男，安徽安庆人，硕士研究生，2019年于苏州科技大学获得学士学位，主要从事电子通信等方面研究。E-mail：18816292771@163.com

梅　茜（1977—），女，河南洛阳人，博士，研究员，博士生导师，2000年、2003年于东南大学分别获得学士、硕士学位，2007年于美国佛罗里达大学获得博士学位，主要从事微流控系统的设计和制造及其在生物医学中的应用研究。E-mail：qmei@sibet.ac.cn

董文飞（1975—），男，吉林长春人，博士，研究员，博士生导师，1996年于浙江大学化学工程系化学工程专业获得学士学位，1999年于中国科学院长春应用化学研究所获得高分子物理化学专业硕士学位，2004年于德国波兹坦大学获得自然科学博士学位，主要从事纳米生物医学工程及其在药物递送、在体成像和液体活检等方面的研究应用。E-mail：wenfeidong@sibet.ac.cn

中图分类号: TP273; R446.1
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出版历程
- 收稿日期: 2021-03-26
- 修回日期: 2021-05-08
- 网络出版日期: 2021-06-02
- 刊出日期: 2021-11-19

Development and application of urine biochemical detection system for a disc microfluidic chip

MENG Yong-kang^{1, 2
,},
LEI Zhu-bing^{2, 3
,},
MEI Qian^{2
, ,},
DONG Wen-fei^2
,

1.
School of Mechanical and Electrical Engineering, Changchun University of Science and Technology, Changchun 130022, China
2.
Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
3.
School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China

Funds: Supported by National Key R&D Program of China (No. 2020YFC4500); National Natural Science Foundation of China (No. 21803075, No. 61805273, No. 81902166, No. 91959112, No. 62027825); Science and Technology Department of Jinan City (No. 2018GXRC016); Science Foundation of the Chinese Academy of Sciences (No. 2020SYHZ0041)

More Information

Corresponding author: qmei@sibet.ac.cn

摘要

摘要: 针对尿液自动化、快速检测的需求，结合微流控技术与生化分析技术，设计并制备了一种基于离心力驱动的碟式微流控尿液生化检测芯片。该芯片采用微流道与毛细阀、虹吸阀和铁蜡阀结合可实现微量样品和试剂有序输送、混合及检测等集成功能，通过COMSOL多物理场仿真软件对芯片上毛细阀和虹吸阀结构进行仿真分析，优化转速。围绕微流控芯片，研制了一套小型化、全自动尿液生化检测系统。通过双光路设计和双波长检测方法降低光源波动和背景干扰对检测结果的影响，并在该系统上进行尿视黄醇结合蛋白重复性和校准分析。结果显示，该系统的精密度变异系数为1.3%~2.46%，说明系统具有较好的重复性。校准曲线表明浓度和吸光度值有良好的线性相关性（R²=0.995）。芯片上4个相同单元结构可完成多样本或多指标的并行检测，有望应用于尿液蛋白的快速检测。
- 碟式微流控芯片 /
- 尿液生化分析 /
- 光电检测 /
- 双光路 /
- 微阀
Abstract: In response to the need for the automated and rapid urine detection, microfluidic technology and biochemical analysis technology are adopted to design and fabricate a disc microfluidic chip used for urine biochemical detection. The chip consisted of microfluidic channels, capillary valve, siphon valve and ferrowax valve which can realize the sequential transportation of the sample and reagent, mixing and detection. COMSOL multiphysics software is used to model the structure of capillary valve and siphon valve and optimize the rotary frequency. Next a fully automatic urine biochemical detection system is generated based on a disc microfluidic chip. The effects of light source fluctuations and background interference on test results are reduced by dual optical path and dual wavelength detection. The detection system is characterized by urinary Retinol Binding Protein (RBP). The results demonstrate the Coefficient of Variation (CV) of the system is 1.3%−2.46%, indicating that the system has good repeatability. The calibration curve shows the linear correlation between urinary RBP concentration and the absorbance (R²=0.995). The four identical unit on the chip could perform a multi-sample or multi-parameter detection in parallel, in which it has a potential to be applied for the rapid detection of urinary protein.
- disc microfluidic chip /
- urinary biochemical analysis /
- photoelectric detection /
- dual optical path /
- microvalve

HTML全文

图 1 碟式微流控芯片示意图（a）和截面图（b）

Figure 1. (a) Schematic diagram and (b) section view of a disc microfluidic chip

下载: 全尺寸图片幻灯片

图 2 微流控芯片单元结构和尺寸

Figure 2. Unit structure and dimensions of a disc microfluidic chip

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图 3 芯片实物图

Figure 3. Photograph of a disc microfluidic chip

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图 4 铁蜡阀的制造和应用

Figure 4. The fabrication and application of ferrowax valves

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图 5 液体突破毛细阀仿真图

Figure 5. Simulation results of liquid breaking through the capillary valve

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图 6 不同转速的虹吸阀仿真结果

Figure 6. Simulation results of siphon valve at various spin speeds

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图 7 样品和试剂的转移和混匀

Figure 7. The transport and mixing of the sample (light pink) and reagent (green and red)

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图 8 系统控制流程图

Figure 8. Flow chart of the system control

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图 9 光学检测系统

Figure 9. Optical detection system

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图 10 双光路线性关系

Figure 10. The linear relationship between two optical paths

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图 11 校准曲线

Figure 11. Calibration curve

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表 1 芯片检测1 mg/L URBP质控品的吸光度差值

Table 1. Absorbance difference of 1 mg/L URBP quality control product measured by the microfluidic chip

检测次数 ΔA 检测次数 ΔA

1 0.00985 6 0.01014
2 0.01040 7 0.00979
3 0.01036 8 0.00973
4 0.01017 9 0.00985
5 0.00976 10 0.00987

下载: 导出CSV

表 2 芯片检测4.3 mg/L URBP质控品的吸光度差值

Table 2. Absorbance difference of 4.3 mg/L URBP quality control product measured by the microfluidic chip

检测次数 ΔA 检测次数 ΔA

1 0.03935 6 0.03814
2 0.03838 7 0.03839
3 0.03912 8 0.03860
4 0.03919 9 0.03784
5 0.03839 10 0.03793

下载: 导出CSV

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