Table 2.

Parameters linear range, regression equation, correlation coefficient (r²), retention time (t_r), limit of quantification (LOQ) and limit of detection (LOD) for HCAA compounds.

Compound	Linear range (ng/mL)	Regression equation	r	tr (min)	LOQ (ng/mL)	LOD (ng/mL)
1	0.05–20	y = 0.0566x − 0.0007	0.9999	3.1	0.05	0.02
2	0.5–200	y = 0.0169x + 0.0290	0.9989	2.8	0.1	0.025
3	0.5–200	y = 0.0092x − 0.0097	0.9996	3.1	0.1	0.02
4	0.5–200	y = 0.0243x + 0.0136	0.9999	2.5	0.05	0.01
5	0.5–200	y = 0.0083x − 0.0287	0.9964	2.2	0.25	0.1
6	0.1–40	y = 0.0619x + 0.0038	0.9999	3.4	0.02	0.005
7	0.25–100	y = 0.0830x + 0.0113	0.9999	3.1	0.05	0.01
8	0.1–40	y = 0.0558x + 0.0011	0.9985	3.4	0.02	0.008
9	0.5–200	y = 0.0591x + 0.1257	0.9992	2.8	0.05	0.01
10	0.5–200	y = 0.0329x + 0.0324	0.9998	2.8	0.1	0.025
11	0.5–200	y = 0.0201x + 0.0128	0.9995	2.5	0.1	0.025
12	0.25–100	y = 0.0332x + 0.0089	0.9995	2.9	0.1	0.025
13	0.25–100	y = 0.0174x + 0.0020	0.9988	2.6	0.05	0.01
14	0.25–100	y = 0.0512x + 0.0038	0.9995	3.0	0.05	0.02
15	0.5–200	y = 0.0228x + 0.0007	0.9983	2.2	0.1	0.025
16	0.5–200	y = 0.0050x − 0.0114	0.9982	1.9	0.1	0.04

^ay means peak area ratio and x means concentration (ng/mL).