Handbook of Solvents - George Wypych - ChemTech - Ventech!

18.1 Measurement and estimation of solvents emission and odor 1207
Density: 0.9 g/cm 3
VOC (g/l) = (100 -5-25)×0.9 × 10 = 630 g/l
DIN ISO 11 890 also allows the calculation to be made using the method prescribed by
ASTM D 3960:
− nfAm
VOClw [ g / l]
= 1000
m
− s
100
100 ρ
ρ
w
w
w
ρ [18.1.4]
s
where:
ρs varnish density in g/ml at 23°C
nfA non-volatile parts determined by ISO 3251 22 (1 h/110°C)
mw mass as water in % mass parts, determined acc. to ISO 760 23 (after Karl-Fischer)
ρw density, in g/ml, of water at 23°C (ρw = 0.997537 g/ml at 23°C)
Example 1
Water spray varnish: 30% solid matter content
10% solvent
60% water content
varnish density 1.0 g/cm 3
water density 1.0 g/cm 3
VOClw = [(100 - 30 - 60)/(100 - 1.0 × 60)] × 1.0 × 1000 = 250 g/l
Example 1:
Water spray varnish but with a density of 0.9 g/cm 3
VOClw = [(100 -3-60)/(100 - 0.9 × 60)] × 0.9 × 1000 = 196 g/l
Or another example:
Example 5:
Water varnish primer: 15% solid matter content
10% solvent
75% water
varnish density 1.0 g/cm 3
VOClw = [(100 - 15 -75)/(100 - 1.0 × 75)] × 1.0 × 1000 = 400 g/l
The calculation permits the deduction of exempt compounds, which are defined as organic
compounds which do not participate in photochemical reactions in the atmosphere.
where:
i= n
100 −nfA −m
m
VOClwe [ g / l]
= 1000
mw 100 −ρs ρ
i = 1
=
−ρs
m
ρ
w
∑
w eci
ρ
i n s
eci
∑
i = 1 eci
[18.1.5]
VOClwe VOC content, in g/l, contained in the product in its ready-to-use condition minus water
and minus exempt compounds
nfA content of non-solvent parts, as a mass share in %
mw water content, as mass share in %
meci content, as mass share in %, of the exempt compound i
density, in g/ml, of sample at 23°C
ρ s