Microsoft Word - 3M Petrifilm REC Plate OMA Manuscript 09121
ERP Methods Book
122
3M Petrifilm Rapid E. coli /Coliform Count Plate
BAM e Chapter 4
95% CI g
Cont. level a
Matrix
Mean b 0.000 1.210 2.472 4.424
s r
RSD r
Mean 0.000 1.414 2.513 4.514
s r
RSD r
LCL h NA
UCL i
Mean diff. f
d
c
Un
NA
NA
NA
NA
NA
NA
Low Med High
0.154 0.146 0.093
12.71 5.892 2.094
0.133 0.083 0.059
9.406 3.310 1.295
‐0.204 ‐0.041 ‐0.091
‐0.378 ‐0.216 ‐0.202
0.051 0.105 0.021
Sealed concrete
a All matrices are artificially contaminated when an uncontaminated (Un) level is reported. 1 b Mean of five replicate portions, plated in duplicate, after logarithmic transformation: Log 10
2
[CFU/g + (0.1)f].
c Repeatability standard deviation. 3 d Relative standard deviation for repeatability. Reported as a percentage. 4 e U.S. Food and Drug Administration Bacteriological Analytical Manual , Chapter 4, Enumeration of Escherichia coli and the Coliform Bacteria. 5 f Mean difference between the candidate and reference methods. 6 g Confidence interval based on paired statistical analysis. 7 h 95% Lower confidence limit for difference of means. 8 i 95% Upper confidence limit for difference of means. 9 k Uncontaminated matrix sample.
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December 6, 2018
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