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.  

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Page 56 of 61

December 6, 2018