Is UG m3 the same as ppb?
Likewise, one milligram per cubic meter (mg/m3) is the same concentration in water as one microgram per liter (ug/L), which is about 1 ppb.
How do you convert ppm to micrograms m3?
Therefore, 1 PPM = 1,000 microgram per meter cubed. Similarly, 1 microgram per meter cubed = 0.001 PPM. To quickly convert from PPM to micrograms, multiply by 1,000. If you have 2 PPM of a solute in solution, the concentration is 2,000 micrograms per meter cubed.
What unit is Ug m3?
The concentration of an air pollutant (eg. ozone) is given in micrograms (one-millionth of a gram) per cubic meter air or µg/m3.
What is a good ug m3?
In the US, exposure to very fine particulate matter known as PM2. 5 is considered safe by the US Environmental Protection Agency’s national ambient air quality standards so long as a person breathes in an average of 12 micrograms per cubic meter of air (μg/m3) or less per day over the duration of a year.
How to convert mg / m3 to ppm molecular weight?
To convert from mg/m3 to ppm, the equation is as fol-lows: Concentration (ppm) = 24.45 x concentration (mg/m3) ÷ molecular weight The same equations may be used to convert micrograms per cubic meter (ug/m3) to parts per billion (ppb) and vice versa: Concentration (ug/m3) = 0.0409 x concentration (ppb) x molecular weight
What’s the difference between pPb and µgm-3?
A concentration in ppb (by volume) is the volume of a gaseous compound per billion volumes of ambient air whereas a concentration in µgm -3 is the mass of a gaseous compound (in µg) per cubic metre of ambient air.
Which is the correct formula for 1 ppb?
µg/m3 = (ppb)*(12.187)*(M) / (273.15 + °C) where M is the molecular weight of the gaseous pollutant. An atmospheric pressure of 1 atmosphere is assumed. SO 2 1 ppb = 2.62 µg/m 3 NO 2 1 ppb = 1.88 µg/m 3 NO 1 ppb = 1.25 µg/m3 O 3 1 ppb = 2.00 µg/m 3 CO 1 ppb = 1.145 µg/m3 Benzene 1 ppb = 3.19 µg/m3
How are concentrations expressed as ppm or ppb?
Concentrations can also be expressed as parts per million (ppm) or parts per billion (ppb) by using a conversion factor. This conversion factor is based on the molecular weight of the chemical and it is different for every chemical. The temperature of the atmosphere also has an influence on the calculation. PPM Enter the number of mg/m3.