6.CALCULATIONSU.K.
6.1. Response factor of nitromethane, calculated with reference to the internal standard used U.K.
If ‘n’ represents nitromethane:
let:
kn
=
its response factor,
m'n
=
its mass (in grams) in the mixture,
S'n
=
its peak area.
If ‘c’ represents the internal standard, chloroform or 2,4-dimathylheptane:
let:
m'c
=
its mass (in grams) in the mixture,
S'c
=
its peak area,
then:
(kn is a function o2 the apparatus).
6.2. Concentration of nkromethane in the sample U.K.
If ‘n’ represents nitromethane:
let:
kn
=
its response factor,
Sn
=
its peak area.
If ‘c’ represents the internal standard, chloroform or 2,4-dimethylheptane:
let:
mc
=
its mass (in grans) in the mixture,
Sc
=
its peak area,
M
=
the mass (in grams) of the aerosol transferred,
then the % (m/m) nitromethane in the sample is:
