. Author manuscript; available in PMC: 2021 May 5.

Published in final edited form as: Anal Chem. 2020 Apr 23;92(9):6521–6528. doi: 10.1021/acs.analchem.0c00129

Table 2.

The most abundant conjugated acylcarnitines and their corresponding acylcarnitines with their median abundances from 18 analyses of the standard reference sample 3667.²⁹

Unconjugated acylcarnitines		Conjugated acylcarnitines
Acylcarnitine	Abundance	Conjugated Acylcarnitine	Abundance
C4:1	1.18e+8	C4:1 + Cysteine	4.31e+8
		C4:1 + Acetylcysteine	1.44e+7
		C4:1 + SO₂	5.84e+7
C5:1	5.93e+8	C5:1 + Cysteine	3.64e+8
		C5:1 + CH₄OS	2.08e+7
		C5:1 + Acetylcysteine	7.29e+6
C6:1	6.85e+7	C6:1 + CH₄S	1.00e+8
C8:1	8.74e+9	C8:1 + Cysteine	2.03e+7
C8:1	8.74e+9	C8:1 + Acetylcysteine	2.32e+7
C10:2	8.81e+8	C10:2 + Cysteine	1.04e+8
C10:2	8.81e+8	C10:2 + Acetylcysteine	1.56e+8