The conversion between ozone concentration units is as follows:

1. Conversion of mg/L (mg/liter) and mg/m³ (mg/cubic meter):

Since the mass of 1 liter of water is approximately 1000 grams, 1mg/L = 1mg/1000g = 0.001g/g = 0.001g/m³. Therefore, the conversion factor between mg/L and mg/m³ is 1:1000.

2. Conversion of ppm (parts per million) to mg/m³:

Under standard conditions (273K, 101.3kPa), the ozone concentration of 1ppm is equal to 2.14mg/m³. Therefore, the conversion factor between ppm and mg/m³ is 1:2.14.

3. Conversion of ppb (parts per billion) to mg/m³:

Under standard conditions (273K, 101.3kPa), the ozone concentration of 1ppb is equal to 0.00214mg/m³. Therefore, the conversion factor between ppb and mg/m³ is 1:0.00214.

4. Conversion of % (wt, mass percentage) and mg/m³:

Mass percentage refers to the ratio of the mass of ozone to the mass of gas containing ozone, multiplied by 100%. Assuming that the molar mass of ozone is 48g/mol, then the ozone concentration of 1% is equal to 48g/m³. Therefore, the conversion factor between % (wt) and mg/m³ is 1:48.

5. Conversion of % (vol, volume percentage) and mg/m³:

Volume percentage refers to the ratio of the volume of ozone to the volume of gas containing ozone, multiplied by 100%. Assuming that the molar volume of ozone is 22.4L/mol, then the ozone concentration of 1% is equal to 22.4mg/m³. Therefore, the conversion factor between % (vol) and mg/m³ is 1:22.4.

To sum up, the conversion relationship between different ozone concentration units is as follows:

1. mg/L = mg/m³ × 1/1000

2. ppm = mg/m³ × 1/2.14

3. ppb = mg/m³ × 1/0.00214

4. %（wt） = mg/m³ × 1/48

5. % (vol) = mg/m³ × 1/22.4

According to actual needs, the above conversion relationship can be used to convert between ozone concentration units.