Original marker
content in the sample
(µg) |
Level of spiking in % |
Theoretical
concentration
after spiking
(µg ± SD) |
Total amount of
drug analysed in
spiked sample
(µg ± SD) |
% Average
recovery ± SD |
% RSD |
| Acetylbarlerin(0.35) |
50
100
150 |
0.53 ± 23.8
0.70 ± 15.1
0.88 ± 4.5 |
0.50 ± 7.3
0.68 ± 27.0
0.84 ± 39.3 |
95 ± 3.10
97 ± 4.02
96 ± 4.46 |
3.25
4.15
4.65 |
Barlerin
(0.81) |
50
100
150 |
1.21 ± 19
1.62 ± 29
2.02 ± 37 |
1.19 ± 14
1.59 ± 55
1.99 ± 32 |
99 ± 2.62
98 ± 2.36
99 ± 1.04 |
2.65
2.41
1.05 |
Shanzhiside methyl ester
(1.36) |
50
100
150 |
2.04 ± 22
2.72 ± 28
3.39 ± 81 |
2.01 ± 20
2.66 ± 115
3.35 ± 146 |
99 ± 1.29
98 ± 3.77
99 ± 1.95 |
1.30
3.86
1.98 |
