From: Validated high-performance thin-layer chromatographic analysis of curcumin in the methanolic fraction of Curcuma longa L. rhizomes
Standard marker
Concentration
(ng)
Intra-day
Inter-day
% RSD
Mean RSD
%RSD
Curcumin
200
0.29
1.85
400
0.19
0.31
1.09
1.48
600
0.45
1.5