3.3.6           Weighting Category Ozone creation

For a weighting of, e.g., solvents in regard to potential ozone creation, in the category denominated the same you can take into consideration information on their different formation of ozone creation potential. The ozone formation potential of substances is regarded in relation to the ozone creation potential of ethylene, and the percental ratio is denominated POCP (Photochemical Ozone Creation Potential). In the program EATOS, for the weighting factors Q we determined POCP-ranges, which besides Q = 1 include ten units, resp., (Table 9) and subdivide the range between 0 and 100, because the usual POCP-values of organic substances range to approximately –10 ‑ 150. The corresponding function, with which Q is determined by use of POCP-values,  reads:

 

Table 9    Assignment of ozone creation potentials (POCP) to the weighting factor QOzone Creation

Q

 

POCP[ethylene := 100]

 

1

0

to

15

2

15

to

25

3

25

to

35

4

35

to

45

5

45

to

55

6

55

to

55

7

55

to

75

8

75

to

85

9

85

to

95

10

95

to

>

           

 

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