Patent ID: 7041210
Filing Date: 2006-05-09
Classification: G01N

Abstract:
1. A method of filling an amperometric cell comprising the steps of: a) drawing a liquid sample into said cell comprising a first insulating substrate carrying a first electrode, a second insulating substrate carrying a second electrode, said electrodes being disposed to face each other and spaced apart by less than 500 μm, and defining a sample reservoir therebetween, wherein at least one of said insulating substrates and the electrode carried thereon includes an electromagnetic radiation transmissive portion in registration with said reservoir; b) exposing the transmissive portion to electromagnetic radiation; c) monitoring a property of the electromagnetic radiation passing and/or reflected through said transmissive portion; d) comparing said monitored property with a value indicative of the cell being filled; and e) continuing to draw the liquid sample into the cell until said monitored property reaches said value.