Processing kodak motion picture films, module 3 analytical procedures
Processing kodak motion picture films, module 3 analytical procedures
Processing kodak motion picture films, module 3 analytical procedures
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Recovery<br />
Recovery is used instead of bias for seasoned samples, since<br />
the component concentration level was not determined<br />
independently of the test method. It is defined as the<br />
calculated mean for the seasoned sample with a standard<br />
addition of the component minus the mean for the seasoned<br />
sample, divided by the actual amount of the standard<br />
addition. It is expressed as a percentage. Statistically, the<br />
recovery of 96.6 percent for Process ECN-2 was<br />
significantly different from 100 percent, but was judged not<br />
to be practically significant.<br />
Reproducibility<br />
Customer Standard Deviation, 1sc & 95 Percent<br />
Confidence Estimate (not including bias)<br />
Reproducibility or customer standard deviation (1sc ) is an<br />
estimate of the variability a customer could expect when<br />
submitting a sample to any Photoprocessing Quality<br />
Services laboratory, where any trained analyst could test the<br />
sample using any instrument on any day.<br />
The 95 percent confidence estimate (calculated using the<br />
customer standard deviation) around a single test result will<br />
include the mean value 95 percent of the time.<br />
Three ferricyanide bleach samples were analyzed by four<br />
analysts, on two different days. Duplicate analyses were<br />
performed on each sample, on each of the two days. These<br />
samples were:<br />
1. A “fresh” ferricyanide bleach prepared with all<br />
components at their respective “working tank” aim<br />
concentrations.<br />
2. A “seasoned” ferricyanide bleach sample analyzed at<br />
46.041 g/L K3Fe(CN) 6 .<br />
3. The same “seasoned” solution, as in number 2, above,<br />
analyzed in the same manner, after making a standard<br />
addition of 13.901 g/L K3Fe(CN) 6 .<br />
Sample<br />
“Fresh” at<br />
“Aim”<br />
(40.000 g/L<br />
K 3Fe(CN) 6)<br />
“Seasoned”,<br />
As Received<br />
“Seasoned”<br />
with<br />
Standard<br />
Addition<br />
Mean<br />
(g/L<br />
K 3Fe(CN) 6)<br />
K 3 Fe(CN) 6 (Visually)<br />
N<br />
Reproducibility<br />
Standard<br />
Deviation, 1S c<br />
(g/L K 3 Fe(CN) 6 )<br />
95 Percent<br />
Confidence<br />
Estimate<br />
(g/L<br />
K 3Fe(CN) 6)<br />
40.282 16 0.122 ± 0.26<br />
46.041 16 0.072 ± 0.15<br />
59.615 16 0.112 ± 0.24<br />
Bias<br />
Bias is a statistically significant deviation of the mean from<br />
the known mix level at a 95 percent confidence level. It is<br />
determined for “fresh” samples only. Bias is not determined<br />
for “seasoned” samples, since the component concentration<br />
level was not determined independently of the test method.<br />
A statistically significant high bias of (+0.282 g/L) for<br />
K 3 Fe(CN) 6 was found for a Process ECN-2 “fresh” tank<br />
developer sample. However, the bias was judged not to be<br />
practically significant.<br />
Recovery<br />
Recovery is used instead of bias for seasoned samples, since<br />
the component concentration level was not determined<br />
independently of the test method. It is defined as the<br />
calculated mean for the seasoned sample with a standard<br />
addition of the component minus the mean for the seasoned<br />
sample, divided by the actual amount of the standard<br />
addition. It is expressed as a percentage. Statistically, the<br />
recovery of 97.7 percent for Process ECN-2 was<br />
significantly different from 100 percent, but was judged not<br />
to be practically significant.<br />
<strong>Processing</strong> KODAK Motion Picture Films, Module 3, Analytical Procedures H24.03 3
Change language