Convert ppb to µg/m^3

Usage

ppb2ugm3(ppb, temp = 293, press = 1013, mw)

Arguments

ppb

Numeric with concentrations in ppb.

temp

Temperature in K (default = 293 K).

press

Pressure in hPa (default = 1013 hPa).

mw

Molecular weight.

Value

Numeric with concentration values in $\mu g/m^3$

Details

The function converts the concentration of a gaseous pollutant from ppb to $\mu g/m^3$ according to the following formula: $$\mu g / m^3 = ppb \cdot \frac{MW}{MV}$$ where $MW$ is the molecular weight and $MV$ is the molecular volume.

Molecular weight:

• NO_2 = 46.0

• O3 = 48.0

Examples

# NO2
ppb2ugm3(ppb = 100, temp = 293, press = 1013, mw = 46.0055)
#> [1] 191.3822