A detailed assessment is presented around the calculation and uncertainty of the lower heating value (net heat of combustion) of conventional and sustainable aviation fuels, from hydrocarbon class concentration measurements, reference molecular heats of formation, and also the uncertainties of these reference heats of formation. Calculations using this paper鈥檚 process and estimations using ASTM D3338 are reported for 17 fuels of diverse compositions and compared against reported ASTM D4809 measurements. All of the calculations created by this technique as well as the reported ASTM D4809 measurements agree (i.e., inside 95% self-confidence intervals). The 95% self-assurance interval from the reduced heating worth of fuel candidates which can be comprised entirely of normal- and iso-alkanes is significantly less than 0.1 MJ/kg by the approach described right here, although higher cyclo-alkane content material leads to 95% confidence bands that method 0.two MJ/kg. Taking a probable bias into account, the accuracy and precision of the approach described within this operate could possibly be as higher as 0.23 MJ/kg for some samples. 148893-10-1 Chemscene 2789593-39-9 Chemscene PMID:26780211