Figure F45. Combined mass chromatograms of the ions m/z 117 + 75 showing the trimethylsilyl ethers and esters of n-alkanols and n-alkanoic acids, respectively, Site C0020. Chromatograms displayed next to carbon preference index (CPI) for n-alkanoic acids and n-alkanes, where CPI n-alkanoic acids = (24:0 + 26:0 + 28:0 + 30:0 + 32:0)/(23:0 + 25:0 + 27:0 + 29:0 + 31:0) and CPI n-alkanes = 2 × ([C25 + C27 + C29 + C31 + C33]/[C24 + C26 + C28 + C30 + C32] + [C25 + C27 + C29 + C31 + C33]/[C26 + C28 + C30 + C32 + C34]). 18:0 = C18 n-alkanoic acid, n25 = C25 n-alkanes, etc.
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