Ozone in air:

mass of ozone / volume of gas - Typically expressed as O³/m³ air or O³/m³ oxygen

mass of pzone / mass of gas - Typically expressed as a % by weight figure (used only for
                                              high concentrations)

volume of ozone / volume of gas - Typically expressed in ppm (used for low concentrations)

Ozone in water:

mass of ozone / volume of water - Expressed in g/m³ or mg/l (or ppm)

臭氧氣體原理 / Ozone - Gas Principles

Universal law of gases - pV/T = nR = mR/M

where

P = pressure (mbar)
V = volume (cm³)
T = Temperature (degree K)
n = molar number = mass of gas (m) / molecular weight (M)
R = universal gas constant = k · NA = 8.31434 - J/mol · K = 83,143.4 -mbar·cm³/mol·K where

k = Boltzmann constant = 1.3806 · 10‾23-J/K
NA = Avogadro constant = 6.022 · 10² 3-1/mol

** UV absorption technique for ozone measurement gives ozone concentration
"C" :           C = mass of ozone / volume of carrier gas (typically g/m³ or mg/l)

** This value is measured at the temperature of measurement and at the pressure of measurement.

臭氧計量單位換算 / Ozone  -  Unit Conversions

To convert a concentration "C¹" measured at a temperature "T¹" and a pressure "p¹" to a concentration at a different temperature and pressure (T², p²):

nR = p1V1/T1 = p² V² /T²
C¹ = mO³/V1     C² =  mO³/V²

C² = C¹ · T1p²/T²p¹

- Temperature in Kelvin; Pressure in millibar; Concentrations "C" expressed in mass of ozone per volume of gas

From                  C = mass O³ / volume carrier gas = mO³/Vc

to                       G = mass O³ / volume carrier gas = mO³/mc

mc = pc Vc Mc /Tc R -----»  mO³/mc = mO³ Tc R/Vc pc Mc

G = C x Tc R / pc Mc · 100%   for units in % by weight

From                     C = mass O³ / volume carrier gas = mO³/Vc

to                    V/V = volume O³ / volume carrier gas = Vo³/Vc

VO³ = mo³ · R To³ / Mo³ po³ -----» Vo³/Vc = mo³ To³ R /  Vc po³ Mo³

V/V = C · To³ R / po³ Mo³ · 106  for units in Volume/Volume

臭氧在空氣中濃度換算表
Concentration conversion table for Ozone in Air

G     =  O³ concentration by weight (%) in air
V/V  =  O³ concentration by volume (ppm) in air
C     =  O³ concentration in grams per cubic meter (g/m³)
T     =  measurement temperature in Kelvin (K)
p     =  measurement pressure in millibars (mbar)

1013.25 mbar  =  standard pressure
    273.3 K       =  standard temperature

Convert pressures to millibars --- pressure in mbar = (pressure in psi) · 68.9

Convert temperature to Kelvin --- degrees K = (degrees C) + 273.3

Convert O³ concentration from g/m³ to % weight --- G = C · 0.29 · T/p
                  [At standard pressure and temperatureG = C ·0.0782]
                  (Example: 12.8 g/m³ at std. conditions = 1%)

Convert O³ concentration from g/m³ to ppm by volume --- V/V = C · 1733 · T/p
                   [At standard pressure and temperatureV/V  = C · 467]
                   (Example: 2.14 g/m³ at std. conditions = 1,000 ppm)

臭氧在標準狀態下濃度換算表
Concentration conversion table at standard conditions

Physical properties (at standard conditions) ---

Density of ozone (O³)      2.14 kg/m³
Density of oxygen  (O²)   1.43 kg/m³
Density of air                  1.29 kg/m³
Density of water              1,000 kg/m³

Useful conversion factors --- 1,000 = 1,000 liters = 1 m³ '; 1 g/m³ = 1 mg/l

Ozone concentration in water --- 1 gO³/m³  H²O = 1 ppm  O³ in water (by weight)

Ozone concentration in air by volume --- 1 gO³/m³  air = 467 ppm O³ in air (by volume)
                                                           1 ppm O³ in air (by volume) = 2.14 mg O³/m³  air

Ozone concentration in air by weight --- 100 gO³/m³ air = 7.8% O³ in air (by weight)
                                                           1% O³ in air (by weight) = 12.8 gO³/m³  air

Ozone concentration in oxygen by weight --- 100 gO³/m³ O² = 6.99% O³ in O²  (by weight)
                                                           1% O³ in air (by weight) = 14.3 gO³/m³  O²