Patent ID: 7582487
Filing Date: 2009-09-01
Classification: B01J,B01L,B82Y,G01N,Y10S,Y10T

Abstract:
1. A method of sensitizing a sensing surface arranged to be passed by a liquid flow within a flow cell, comprising: providing a laminar flow of a first sensitizing fluid capable of sensitizing the sensing surface, and a laminar flow of a non-sensitizing fluid adjacent to the flow of the first sensitizing fluid such that the two laminar fluids flow together over the sensing surface with an interface to each other, adjusting the relative flow rates of the first sensitizing fluid and non-sensitizing fluid to position the interface such that the first sensitizing fluid contacts a first discrete sensing area of the sensing surface for selective sensitization thereof, replacing the first sensitizing fluid by non-sensitizing fluid, and replacing the non-sensitizing fluid by the first sensitizing fluid or by a second sensitizing fluid that is capable of sensitizing the sensing surface, and adjusting the relative flow rates of the sensitizing fluid and the non-sensitizing fluid to displace the interface laterally such that the sensitizing fluid contacts a second discrete sensing area spaced apart from the first discrete sensing area of the sensing surface for selective sensitization thereof to produce two sensitized areas spaced apart by a non-sensitized area on the sensing surface comprising a third non-sensitized discrete sensing area serving as control.