319 / 350
Table 16.
Method Comparison Results for Sliced Apples at 48 Hours.
1
SD
SD
(S
r
)
(S
r
)
1 4.0 x10
1
1.6021
4.0x10
1
1.6021
2 1.0 x10
1
1.0000
1.0 x10
1
1.0000
3
1.0x10
1
1.0000
1.0 x10
1
1.0000
4
2.0x10
1
1.301
<10
<0
5
2.0x10
1
1.301
<10
<0
1 4.4 x10
2
2.6435
4.6x10
2
2.6628
2 1.2 x10
2
2.0792
1.1x10
2
2.0414
3 1.4 x10
2
2.1461
1.1 x10
2
2.0414
4 1.2 x10
2
2.0792
4.0 x10
1
1.6021
5 1.6 x10
2
2.2041
1.5 x10
2
2.1761
1 1.8 x 10
4
4.2553
3.0 x 10
4
4.4771
2 1.6 x 10
4
4.2041
1.9 x 10
4
4.2788
3 2.5 x 10
4
4.3979
3.6 x 10
4
4.5563
4 2.6 x 10
4
4.415
4.1x 10
4
4.6128
5 1.4 x 10
4
4.1461
1.9 x 10
4
4.2788
p-value
Ct/g
LOG MEAN
Ct/g
LOG MEAN
Low
1.2408 0.2519
1.2007
Level
Sample
3MRYMPetrifilm
ISO/FDA BAM
0.3476 0.8546
Medium
2.2304 0.2367
2.4414 0.3799 0.5476
High
4.2837 0.1187
4.4407 0.1555 0.1104
2
3
Sliced Apples 60 hours
4
No statistically significant difference was observed between all 3 levels analyzed between the two
5
methods. The p-values calculated at a 95% confidence level for the low, medium, and high levels were
6
0.8546, 0.3675, and 0.1104, respectively. The t-test indicated no significant differences between the 3M
7
RYM method and the ISO and FDA BAM methods. The 3M RYM method had a higher repeatability value
8
than the ISO and FDA BAM methods for the all levels, with S
r
values, respectively, of 0.2519 and 0.3476
9
for the low level, 0.2133 and 0.3799 for the medium level, and 0.1187 and 0.1555 for the high level.
10
Detailed results are presented in Table 17.
11
12
13
14
15
16
17
18
19
20
23
AOAC Research Institute
Expert Review Panel Use Only
OMAMAN-16D/ PTM Report
ERP Use Only - December 2014