Variation in Gas and Volatile Compound Emissions from Human Urine as It Ages, Measured by an Electronic Nose

By S. Esfahani, N. M. Sagar, I. Kyrou, E. Mozdiak, N. O’Connell, C. Nwokolo, K. D. Bardhan, R. P. Arasaradnam and J. A. Covington, Biosensors, 6(1), 4, 2016