Cotinine Kit - The Cotinine Direct ELISA Kit is intended for the measurement of Cotinine in serum and urine, and can also be adapted for other fluids. Cotinine due to its longer half life has been used in research as a reliable marker for smoking status and smoking cessation studies. For more info please visit here http://http://www.bqkits.com/shopcart/index.php?c=0&p=79 »