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K
oshy
et al
.:
J
ournal of
AOAC I
nternational
V
ol
.
99, N
o
.
6, 2016
1455
Table 8. Precision of retention time of standards
Compound
Concn, μg/mL
N
Retention time
Mean, min
RSD
r
, %
W-IV
1321
5
15.51
0.02
661
5
15.56
0.62
330
5
15.53
0.54
165
5
15.52
0.12
83
5
15.52
0.05
41.3
5
15.50
0.08
20.6
5
15.47
0.05
W-V
1201
5
19.70
0.04
600
5
19.73
0.55
300
5
19.72
0.46
150
5
19.70
0.07
75
5
19.72
0.40
37.5
5
19.66
0.03
18.8
5
19.65
0.06
WF-A
1475
5
20.35
0.04
738
5
20.39
0.49
369
5
20.38
0.41
184
5
20.36
0.06
92
5
20.36
0.06
46.1
5
20.34
0.03
23.1
5
20.32
0.05
12-D
1421
5
21.37
0.03
711
5
21.40
0.38
355
5
21.39
0.32
178
5
21.38
0.05
88.8
5
21.37
0.05
44.4
5
21.36
0.02
22.2
5
21.35
0.04
W-A
1382
5
22.22
0.02
691
5
22.26
0.34
346
5
22.25
0.29
173
5
22.24
0.05
86
5
22.24
0.05
43.2
5
22.22
0.02
21.6
5
22.22
0.04
W-B
1350
5
25.52
0.02
675
5
25.54
0.21
338
5
25.54
0.19
169
5
25.53
0.03
84
5
25.53
0.04
42.2
5
25.52
0.03
21.1
5
25.51
0.01
60