Figure 3
From: Assessment of nicotine for second hand smoke exposure in some public places in Romania by UPLC-MS
Concentration of nicotine (ng · L-1) in different types of buildings: 1 = high schools (corridor), 2 = universities (corridor), 3 = hospitals (waiting rooms), 4 = Pubs (with smoking allowed), 5 = pubs (with smoking prohibited), 6 = Restaurants (with smoking allowed), 7 = Restaurants (with smoking prohibited). The horizontal lines represent the median concentration.