Citation: Xing CHEN, Da Fu CUI, Chang Chun LIU. High Purity DNA Extraction with a SPE Microfluidic Chip Using KI as the Binding Salt[J]. Chinese Chemical Letters, ;2006, 17(8): 1101-1104. shu

High Purity DNA Extraction with a SPE Microfluidic Chip Using KI as the Binding Salt

State Key Laboratory of Transducer Tech., Institute of Electronics, Chinese Academy of Sciences, Beijing 100080

Received Date: 4 January 2006

Fund Project: The authors greatly acknowledge the financial support from the National Natural Science Foundation of China (No. 20299030, 60427001 and 60501020).

Based on solid phase extraction method, a novel silicon-PDMS-glass microchip for high purity DNA extraction has been developed by using KI as the binding salt. The microfluidic chip fabricated by MEMS technology was composed of a silicon substrate with a coiled channel and a compounded PDMS-glass cover. With this microfluidic chip, the wall of the coiled channel was used as solid phase matrix for binding DNA and DNA was extracted by the fluxion of the binding buffer, washing buffer and elution buffer. KI as a substitute for guanidine, was used successfully as binding salt for purification DNA, obtaining higher purity of genomic DNA and about 13.9 ng DNA from 1 μL rat whole blood in 35 minutes.
- MEMS,
- microfluidic,
- KI,
- solid phase extraction (SPE),
- DNA purification
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