Cortana may refer to: 1  Cortana (software), Microsoft personal assistant software. 2  Cortana (Halo), a fictional artificial intelligence character. 3  Cortana (gastropod), a gastropod genus.  Cortana, or Curtana, a ceremonial sword used in the coronation of British 1  monarchs. Cortana Mall, Baton Rouge, Louisiana,  USA.
The length of time that nicotine stays in the body and cotinine can be a reliable indicator of nicotine use depends on the amount of tobacco smoked, the number of years smoking tobacco, and the type of nicotine test performed. It can be as short as 2 days, or as long as 3 months.
When nicotine is absorbed into the body, it breaks down into cotinine. A blood test for nicotine will usually include a measurement of cotinine levels. Nicotine has a half-life of roughly two hours, meaning that half the nicotine in the body converts to cotinine every two hours. Cotinine's half-life is roughly twenty hours.