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Cotinine is the major metabolite of nicotine and the long half-life means it stays in the body for about 3 days after the inhalation of tobacco smoke.
Cotinine measurements are usually carried out in a laboratory with a technique such as gas chromatography. This is expensive and time consuming.
SmokeScreen® is a 5-minutes, point-of-care test for cotinine and other nicotine metabolites. It can assess smoking semi-quantitatively by comparison to a colour chart or with a SmokeScreen Analyzer for a quantitative read-out.
Nicoscreen provide accurate and rapid results for detecting nicotine use.
In conclusion SmokeScreen and Nicoscreen tests have been proven to be superior to expired-air CO monitoring for detecting low level smoking, identifying smoking over a longer period of time and is specific to nicotine intake.