Table 2: Accuracy of CE-UV and LC-MS/MS methods.

SampleCocaine ( g/note)Cocaine ( g/note)
CE-UVLC-MS/MS

2a
11a
12a
18a
21a
8b
9b
12b
13b
14b

Banknotes obtained from general circulation.
bBanknotes obtained in ATMs.
c -test for paired samples, ; no significant difference was observed, 95% confidence interval.