Table 2: Intraday and interday precision of the proposed methods.

MethodConc.
(ng/mL)
Recovery (%) SDaIntraday precisionInterday precision
Mean SDa%RSDMean SDa%RSD

20 1.18 1.51
Micelle-enhanced
spectrofluorometric
125 0.82 1.86
500 1.08 1.42

250 0.58 1.90
Hantzsch reaction500 0.70 1.43
1000 0.44 0.82

Mean of six determinations.