4. AOACRIMicroMethods-2018Awards
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B ird et al .: J ournal of AOAC I nternational V ol . 99, N o . 3, 2016 669
Table 2015.13F. Log 10 Chapter 6 reference method
total aerobic bacterial counts for pasteurized skim milk by 3M Petrifilm RAC Plate vs SMEDP
Low
Medium
High
Petrifilm RAC a
SMEDP b
Petrifilm RAC
SMEDP
Petrifilm RAC
SMEDP
Log 10
CFU/g
Log 10
CFU/g
Log 10
CFU/g
Log 10
CFU/g
Log 10
CFU/g
Log 10
CFU/g
A c
Laboratory
B
A
B
A
B
A
B
A
B
A
B
1 2 3 4 5
2.303 2.303 2.324 2.004 3.324 3.507 3.258 3.558 4.569 4.581 4.449 4.449 3.146 2.904 3.188 2.893 3.904 4.013 3.800 3.914 4.644 4.592 4.708 4.603 2.644 2.324 2.733 2.417 3.382 3.793 3.149 3.779 4.757 4.820 4.682 4.807 2.507 2.364 2.569 2.433 3.382 3.507 3.344 3.603 4.558 4.682 4.624 4.644
2.749 2.945 2.725 2.852 3.708 3.741 3.614 3.581 4.382 d
4.904 4.303 d
4.779
6 e 7 e 8 e
NA NA NA
NA NA NA
NA NA NA
NA NA NA
NA NA NA
NA NA NA
NA NA NA
NA NA NA
NA NA NA
NA NA NA
NA NA NA
NA NA NA
9
2.507 2.533 2.417 2.382 3.700 3.558 3.581 3.449 4.864 4.614 4.764 4.479 2.592 2.533 2.449 2.382 3.624 3.592 3.149 3.433 4.654 4.682 4.581 4.654 2.581 2.149 2.417 2.233 3.207 3.479 3.233 3.464 4.558 4.417 4.507 4.433 2.741 2.764 2.725 2.558 3.507 3.624 3.207 3.433 5.080 4.846 4.717 4.700 2.207 2.207 2.083 2.258 3.233 3.179 3.258 3.149 4.281 4.449 4.344 4.382 2.233 2.149 2.149 2.233 3.149 3.179 3.149 3.303 4.382 4.303 4.344 4.382 1.908 2.083 2.083 2.045 3.258 3.207 3.382 3.507 4.382 4.303 4.258 4.303 2.793 2.793 2.708 2.733 3.964 3.814 3.893 3.786 4.955 5.022 4.914 4.920
10 11 12 13 14 15 16
a RAC = 3M Petrifilm Rapid Aerobic Count Plate method. b SMEDP = Standard Methods for the Examination of Dairy Products Chapter 6 (Standard Plate Count Method). c A and B indicate duplicate test portions. d Cochran’s outlier. e NA = Not available, laboratory did not participate, or did not submit data.
Table 2015.13G. Log 10 reference method
total aerobic bacterial counts for instant NFDM by 3M Petrifilm RAC Plate vs SMEDP Chapter 6
Low
Medium
High
Petrifilm RAC a
SMEDP b
Petrifilm RAC
SMEDP
Petrifilm RAC
SMEDP
CFU/g
Log 10
CFU/g
Log 10
CFU/g
Log 10
CFU/g
Log 10
CFU/g
Log 10
CFU/g
Log 10
A c
Laboratory
B
A
B
A
B
A
B
A
B
A
B
1 2 3 4 5 6 7
2.400 2.449 2.083 2.364 3.034 3.087 2.800 2.820 4.391 4.243 3.955 3.858 2.364 2.449 2.258 2.344 2.974 2.992 2.779 2.793 4.215 4.165 4.199 4.231 2.149 2.233 2.303 2.258 2.935 2.914 3.009 2.974 4.188 4.375 4.108 4.292 2.382 2.417 2.417 2.464 3.005 3.087 2.820 2.935 4.246 4.162 4.199 4.137 2.417 2.507 2.083 2.400 3.290 3.371 3.146 3.312 4.322 4.241 4.256 4.061 2.417 2.382 2.149 2.149 2.881 3.034 2.950 2.870 4.215 4.146 4.199 4.168 2.479 2.449 2.417 2.533 2.978 3.053 2.898 2.945 4.046 4.256 4.026 4.362 2.400 2.479 2.258 2.449 3.000 3.000 2.904 3.050 4.000 4.000 3.807 3.992 2.581 2.533 2.464 2.569 3.173 3.140 3.114 3.171 4.295 4.193 4.279 4.215 2.479 2.083 d 2.417 2.083 d 2.876 2.779 2.700 2.664 4.210 4.623 4.140 4.720 NA NA NA NA NA NA NA NA NA NA NA NA
8 e
9
10 11 12 13 14 15 16
2.533 2.558 2.258 2.004 d
3.061 2.992 3.231 3.080 4.108 4.368 4.000 4.299
2.433 2.400 2.149 2.207 3.026 3.080 2.945 2.914 4.156 4.716 4.134 4.681 2.479 2.581 2.624 2.644 3.140 3.159 2.955 2.881 4.065 4.398 4.094 4.306
2.382 2.520 2.644 2.449 3.407 3.204 3.613 d
3.143 4.484 4.591 4.267 4.176
2.344 2.117 2.382 2.207 2.852 2.876 2.983 2.964 4.162 3.846 4.065 3.974
a RAC = 3M Petrifilm Rapid Aerobic Count Plate method. b SMEDP = Standard Methods for the Examination of Dairy Products Chapter 6 (Standard Plate Count Method). c A and B indicate duplicate test portions. d Cochran’s outlier. e NA = Not available, laboratory did not participate, or did not submit data.
03/10/2019
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