Division 6.2 Concentration of nkromethane in the sample

If ‘n’ represents nitromethane:

let:

k_n

its response factor,

S_n

its peak area.

If ‘c’ represents the internal standard, chloroform or 2,4-dimethylheptane:

let:

m_c

its mass (in grans) in the mixture,

S_c

its peak area,

M

the mass (in grams) of the aerosol transferred,

then the % (m/m) nitromethane in the sample is:

$$\frac{m_c}{M}\times \frac{K_n{\mathrm{\times \; S}}_n}{S_c}\mathrm{\times \; 100}$$