Where:
[XI]THCE = the sum of the C1-equivalent concentrations of non-oxygenated hydrocarbon, alcohols, and aldehydes.
[XI]NOTHC = the sum of the C1-equivalent concentrations of NOTHC.
[XI]OHCi = the C1-equivalent concentration of oxygenated species i in diluted exhaust, not corrected for initial contamination.
[XI]OHCi-init = the C1-equivalent concentration of the initial system contamination (optional) of oxygenated species i, dry-to-wet corrected.
[XI]THC[THC-FID]cor = the C1-equivalent response to NOTHC and all OHC in diluted exhaust, HC contamination and dry-to-wet corrected, as measured by the THC-FID.
RFOHCi[THC-FID] = the response factor of the FID to species i relative to propane on a C1-equivalent basis.
Mdexh = the molar mass of diluted exhaust as determine in § 1065.340 .
mdexhOHCi = the mass of oxygenated species i in dilute exhaust.
MOHCi = the C1-equivalent molecular weight of oxygenated species i.
mdexh = the mass of diluted exhaust.
ndexhOHCi = the number of moles of oxygenated species i in total diluted exhaust flow.
ndexh = the total diluted exhaust flow.
Where:
xNMHCE = the sum of the C1-equivalent concentrations of nonoxygenated nonmethane hydrocarbon (NONMHC), alcohols, and aldehydes.
RFCH4[THC-FID] = the response factor of THC-FID to CH4.
xCH4 = concentration of CH4, HC contamination (optional) and dry-to-wet corrected, as measured by the gas chromatograph FID.
xTHC[THC-FID]cor = 145.6 [MICRO]mol/mol
xCH4 = 18.9 [MICRO]mol/mol
xC2H5OH = 100.8 [MICRO]mol/mol
xCH3OH = 1.1 [MICRO]mol/mol
xC2H4O = 19.1 [MICRO]mol/mol
xCH2O = 1.3 [MICRO]mol/mol
RFCH4[THC-FID] = 1.07
RFC2H5OH[THC-FID] = 0.76
RFCH3OH[THC-FID] = 0.74
RFH2H4O[THC-FID] = 0.50
RFCH2O[THC-FID] = 0.0
xNMHCE = xTHC[THC-FID]cor - (xC2H5OH·RFC2H5OH[THC-FID] + xCH3OH·RFCH3OH[THC-FID] + xC2H4O·RFC2H4O[THC-FID] + xCH2O·RFCH2O[THC-FID]) + xC2H5OH + xCH3OH + xC2H4O + xCH2O - (RFCH4[THC-FID]·xCH4)
xNMHCE = 145.6 - (100.8 · 0.76 + 1.1 · 0.74 + 19.1 · 0.50 + 1.3 · 0) + 100.8 + 1.1 + 19.1 + 1.3 - (1.07 · 18.9)
xNMHCE = 160.71 [MICRO]mol/mol
40 C.F.R. §1065.665