Patent ID: 8062502

Claim:
A method for detecting a detectable product, comprising: filling a detection space with a substrate solution; enriching a detectable product by an enrichment reaction in the detection space during a first time period corresponding to an enrichment period; acquiring a first detection signal of the detectable product following the enriching that occurs during the first time period via a controller; terminating the enriching during the first time period by rinsing the detectable product out from the detection space with the substrate solution; acquiring a baseline signal as a second detection signal via the controller after the rinsing out, the second detection signal being acquired from the substrate solution in the detection space, wherein the first detection signal is acquired at the end of the first time period and the second detection signal is acquired subsequent to expiration of a second time period that begins with the rinsing out of the detection space, the first time period being relatively longer than the second time period; and determining an amount of detectable product from a signal difference between the first and the second detection signals.