Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Total VOC (tVOC) signal in a typical meeting room, recorded with 10 different SGP sensors (green) over a period of about 4 months (a); the median is given as black line. The two red rectangles indicate the position of the zoom-ins provided in panels (b,c). On the secondary y-axis, the maximum values of the corresponding air-quality levels are indicated [46].
