This study investigated the feasibility of capillary as carrier for DNA detection.First

1×10-4mol/L ssDNA is fixed onto capillary inernal wall with 0.2%poly-l-lysine

then hybridizes with 3.33×10-5mol/L target DNA

and finally the ssDNA is dyed with 1g/L EB and detected by RF5000 fluorescence spectrophotometer（t=5.5629

p<0.05）.The result shows that the fluorescence intensities of the samples at 14h are significantly higher than those of the blanks 12h

target DNA of 0.01

0.1

1

100

1000nmol/L is detected

and fluorescence intensity increases obviously with the increase of hybridization time.Experiments show that capillary is a practicable carrier for DNA detection.