Capillary Electrophoresis with UV Detection to Determine Cocaine on Circulated Banknotes

Table 1

Some figures of merit for the CE-UV method applied to the determination of cocaine on banknotes.

Parameter	Value
Linearity—slope (L mg^−1)	0.32±0.003
Linearity—intercept	−0.003±0.015
Linearity—correlation coefficient (𝑟)	0.9997
Instrumental precision (RSD%); peak area; 𝑛=10	0.3
Instrumental precision (RSD%); migration time; 𝑛=10	2.2
Intraday precision (RSD%); migration time; 𝑛=6	2.2
Intraday precision (RSD%); peak area; 𝑛=6	3.0
Interday precision (RSD%); peak area; (1 mg L^−1); 𝑛=3	0.3
Interday precision (RSD%); peak area; (2 mg L^−1); 𝑛=3	4.5
Interday precision (RSD%); peak area; (3 mg L^−1); 𝑛=3	3.4
LOD (mg L^−1) for standard	0.2
LOQ (mg L^−1) for standard	0.8