Table 3.

Analytical characteristics of the developed CE-C⁴D method.

BAs	Linear Range (mg L−1)	Regression Equation	R 2	LOD (µg L−1)
PUT	1.0–100	y = 0.375x + 3.715	0.988	27
CAD	1.0–50	y = 0.465x + 2.400	0.989	22
HIS	5.0–100	y = 0.367x + 6.082	0.981	28
SPD	1.0–100	y = 0.362x + 3.519	0.982	29
SPM	1.0–100	y = 0.430x + 3.725	0.991	24
PEA	2.0–100	y = 0.490x + 2.849	0.982	21
TYR	5.0–100	y = 0.626x + 0.104	0.985	16
TRY	2.0–100	y = 0.473x + 1.193	0.996	27