9 / 63
K
line
et al
.:
J
ournal of
AOAC I
nternational
V
ol
.
100, N
o
.
3, 2017
7
Table 5. Accuracy test for aloin A in aloe concentrate
Spike
level, ppb
Sample
wt, g
Aloin A
added, ng
Expected
amount
of aloin A,
ppb
Aloin A
found,
ppb
Recovery,
%
Avg.
recovery,
%
10
1
.0066 11.07 11.00 9.
17 83.4 82.9
1.0229 11.07 10.82 9.28 85.7
1.0294 11.07 10.75 8.57 79.7
20
1
.0060 22.14 22.01 18.
96 86.2 86.7
1.0205 22.14 21.70 19.02 87.7
1.0256 22.14 21.59 18.64 86.3
30
1.0164 33.21 32.67 29.13 89.2 88.1
1.0228 33.21 32.47 28.13 86.6
1
.0014 33.21 33.16
29.31 88.4
Table 6. Accuracy test for aloin B in aloe concentrate
Spike
level, ppb
Sample
wt, g
Aloin B
added,
ng
Expected
amount of
aloin B,
ppb
Aloin B
found,
ppb
Recovery,
%
Avg.
recovery,
%
10
1
.0066 10.23 10.16 8
.31 81.8 87.1
1.0229 10.23 10.00 8.99 89.9
1.0294 10.23 9.94 8.90 89.6
20
1
.0060 20.46 20.34 19
.14 94.1 89.5
1.0205 20.46 20.05 18.19 90.7
1.0256 20.46 19.95 16.68 83.6
30
1.0164 30.69 30.19 25.15 83.3 86.1
1.0228 30.69 30.01 25.34 84.5
1
.0014 30.69 30.65
27.71 90.4
Table 7. Accuracy test for aloe-emodin in aloe concentrate
Spike
level,
ppb
Sample
wt, g
Aloe-emodin
added, ng
Expected
amount of
aloe-
emodin,
ppb
Aloe-
emodin
found,
ppb
Recovery,
%
Avg.
recovery,
%
10
1.0066 11.14
11.07 11.05 99.8 99.1
1.0229 11.14
10.89 10.57 97.1
1.0294 11.14
10.82 10.85 100.3
20
1.
0060 22.28 22.15 21.
25 95.9 95.0
1.0205 22.28 21.83 20.27 92.8
1.0256 22.28 21.72 20.94 96.4
30
1.0164 33.42 32.88 31.29 95.2 94.2
1.0228 33.42 32.68 30.38 93.0
1.
0014 33.42 33.37
31.55 94.5
Table 8. Accuracy test for aloin A in aloe powder
Spike
level, ppb
Sample
wt, g
Aloin A
added,
ng
Expected
amount
of aloin A,
ppb
Aloin A
found,
ppb
Recovery,
%
Avg.
recovery,
%
10
0.5046 5.535 10.97 11.07 100.9 100.1
0.5087 5.535 10.88 9.74 89.5
0.5105 5.535 10.84 11.93 110.0
20
0.5194 11.07 21.31 18.88 88.6 85.1
0.5059 11.07 21.88 18.45 84.3
0.5059 11.07 21.88 18.04 82.4
30
0.5134 16.61 32.34 26.01 80.4 84.5
0.5106 16.61 32.52 26.90 82.7
0.5018 16.61 33.09 29.89 90.3
Table 9. Accuracy test for aloin B in aloe powder
Spike
level, ppb
Sample
wt, g
Aloin B
added,
ng
Expected
amount of
aloin B,
ppb
Aloin B
found,
ppb
Recovery,
%
Avg.
recovery,
%
10
0.5046 5.115 10.14 9.56 94.3 89.1
0.5087 5.115 10.06 9.06 90.1
0.5105 5.115 10.02 8.31 82.9
20
0.5194 10.23 19.70 15.86 80.5 85.5
0.5059 10.23 20.22 18.96 93.8
0.5059 10.23 20.22 16.60 82.1
30
0.5134 15.35 29.89 25.95 86.8 88.1
0.5106 15.35 30.05 26.34 87.6
0.5018 15.35 30.58 27.48 89.9
Table 10. Accuracy test for aloe-emodin in aloe powder
Spike
level, ppb
Sample
wt, g
Aloe-
emodin
added,
ng
Expected
amount
of aloe-
emodin,
ppb
Aloe-
emodin
found,
ppb
Recovery,
%
Avg.
recovery,
%
10
0.5046 5.570 11.04 11.72 106.2 109.1
0.5087 5.570 10.95 12.14 110.9
0.5105 5.570 10.91 12.04 110.3
20
0.5194 11.14 21.45 20.08 93.6 95.6
0.5059 11.14 22.02 21.28 96.6
0.5059 11.14 22.02 21.29 96.7
30
0.5134 16.71 32.55 30.49 93.7 94.9
0.5106 16.71 32.73 31.02 94.8
0.5018 16.71 33.30 32.01 96.1
9