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. 2023 Mar 31;17:1007–1024. doi: 10.2147/DDDT.S399290

Table 1.

Internal Standard Substances

NO Name Concentration (μg/mL)
1 Carnitine C2:0-d3 0.08
2 Carnitine C8:0-d3 0.05
3 Carnitine C10:0-d3 0.05
4 Carnitine C16:0-d3 0.075
5 LPC 19:0 0.375
6 FFA C16:0-d3 1.25
7 FFA C18:0-d3 1.25
8 CDCA-d4 0.375
9 CA-d4 0.925
10 Trp-d5 2.125
11 Phe-d5 1.8
12 SM 12:0 0.375
13 Choline-d4 1