The volume of enrichment phase (200 ± 10 L) was measured by a graduated syringe. The surfactant phase was removed with a pipette and subsequently placed into the microscopic holes and the absorbance was measured at 490 nm against the blank.
The volume of enrichment phase (200 ± 10 L) was measured by a graduated syringe.The surfactant phase was removed with a pipette and subsequently placed into the microscopic holes and the absorbance was measured at 490 nm against the blank.