浓度(μmol/L)

12 h

24 h

36 h

48 h

0

0.261 ± 0.012

0.267 ± 0.016

0.273 ± 0.014

0.276 ± 0.012

2.0

0.326 ± 0.015

0.354 ± 0.011

0.390 ± 0.020

0.414 ± 0.017

4.0

0.369 ± 0.096

0.451 ± 0.011

0.597 ± 0.019

0.657 ± 0.016

6.0

0.426 ± 0.044

0.748 ± 0.021

0.751 ± 0.023

0.780 ± 0.026

8.0

0.536 ± 0.056

0.751 ± 0.028

0.766 ± 0.013

0.778 ± 0.015