Fig. 13.

(a) Temperature-dependent signal profiles of m/z=160.11 (C₈H₁₆O₃) and its potential fragments (C₈H₁₅O₂, C₈H₁₅O, C₅H₉O₃, and C₃H₇O₂) from 2,5-dimethylhexane low-temperature oxidation in a JSR measured at a photon energy of 9.5 eV. The fragment signals are normalized by the C₈H₁₆O₃ signal at 510 K (normalization ratios in parentheses). (b) Photoionization energy scan of C₈H₁₆O₃ produced from 2,5-dimethylhexane LT oxidation at 505 K. The solid arrow indicates the calculated ionization energy threshold for KHP-3; the dashed arrows indicate the calculated IEs of the other two probable KHP isomers (see text and original publication for details). Reprinted from [162] with permission from Elsevier/The Combustion Institute.