Table 2.

Heatmap depicting the relative suitability of internal standards for various DFRC analytes.^[a]

Analytes	Difference in value compared to the deuterated analog [%]
	tetracosane	BPO	DEDF	H‐d 8	G‐d 8	S‐d 8	G‐pBA‐d 8	S‐pBA‐d 8	G‐DD pCA‐d 10	S‐DD pCA‐d 10	G‐DDFA‐d 10	S‐DDFA‐d 10
H‐OH/Ac	30	47	43	0	2	2	17	40	22	26	24	56
G‐OH/Ac	35	41	145	4	0	4	91	146	95	124	141	158
S‐OH/Ac	31	45	124	4	2	0	63	102	73	88	98	114
G‐pBA	3517	4580	54	29	14	19	0	43	15	17	3	62
S‐pBA	53	60	64	50	37	41	30	0	40	18	32	13
G‐DHpCA	308	308	9	44	50	47	27	34	0	17	6	46
S‐DHpCA	11	25	7	25	35	32	9	14	14	0	9	24
G‐DHFA	2123	2378	39	26	4	2	4	47	12	20	0	66
S‐DHFA	2133	2351	4	12	71	67	17	11	36	24	30	0

[a] ▪=deuterated analogue, ▪=<10 %, ▪=10–25 %, ▪=25–50 %, ▪=>50 % difference.