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
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VISUAL TITRATION STATISTICS<br />
Repeatability Standard Deviation, 1s r and<br />
95 Percent Confidence Estimate<br />
Repeatability Standard Deviation is an estimate of the<br />
variability one trained analyst should be able to obtain under<br />
favorable conditions (analyzing a sample, with one<br />
instrument, within one day).<br />
The 95 percent Confidence Estimate (calculated using the<br />
repeatability standard deviation) around a single test will<br />
include the mean value 95 percent of the time.<br />
Samples<br />
(Process<br />
ECP-2 Dev)<br />
“Fresh” at<br />
“Aim”<br />
(2.9590 g/L<br />
CD-2)<br />
“Seasoned”,<br />
As<br />
Received<br />
“Seasoned”<br />
with<br />
Standard<br />
Addition<br />
Mean<br />
Level<br />
(g/L CD-2)<br />
CD-2 (Visually)<br />
(N)<br />
Repeatability<br />
Standard<br />
Deviation,<br />
1S r (g/L CD-2)<br />
95 Percent<br />
Confidence<br />
Estimate<br />
(g/L CD-2)<br />
2.8755 5 0.006 ± 0.016<br />
1.1041 5 0.010 ± 0.029<br />
2.0985 5 0.002 ± 0.006<br />
Bias<br />
Bias is a statistically significant deviation from the known<br />
mix level at a 95 percent confidence level. It is determined<br />
for “fresh” samples only. Bias is not determined for<br />
“seasoned” samples, since the component concentration<br />
level was not determined independent of the test method.<br />
A statistically significant low bias (of 2.8 percent) for<br />
CD-2 was found for a “fresh” tank Process ECP-2 developer<br />
sample. However, the bias for was judged not to be<br />
practically significant.<br />
Recovery<br />
Recovery is used instead of bias for “seasoned” samples,<br />
since 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<br />
“seasoned” sample, divided by the actual amount of the<br />
standard addition. It is expressed as a percentage. The<br />
recovery of 98.4 percent is statistically different from 100<br />
percent. However, this was judged not to be practically<br />
significant.<br />
Reproducibility<br />
(Customer) Standard Deviation, 1s c & 95 Percent<br />
Confidence Estimate (not including bias)<br />
The customer standard deviation (1s c ) is an estimate of the<br />
variability a customer could expect when submitting a<br />
sample to any Photoprocessing Quality Services laboratory,<br />
where any trained analyst could test the sample using any<br />
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 />
Samples<br />
(Process<br />
ECP-2 Dev)<br />
“Fresh” at<br />
“Aim”<br />
(2.962 g/L<br />
CD-2)<br />
“Seasoned”,<br />
As<br />
Received<br />
“Seasoned”<br />
with<br />
Standard<br />
Addition<br />
SPECIAL APPARATUS<br />
All volumetric glassware should meet all “Class A”<br />
specifications, as defined by American Society for Testing<br />
and Materials (ASTM) Standards E 287, E 288, and E 969,<br />
unless otherwise stated.<br />
Pipette, (25 & 50-mL)<br />
Separatory funnels, (250-mL)<br />
Beakers, (250-mL)<br />
Exhaust hood<br />
Mean<br />
Level<br />
(g/L CD-2)<br />
CD-2 (Visually)<br />
METROHM 536 Titrator or equivalent with a DOSIMAT<br />
and a 20-mL burette<br />
Platinum indicator electrode, BECKMAN, Model 39273<br />
or equivalent<br />
Double junction reference electrode, ORION Model<br />
900200 or equivalent<br />
Filling solutions:<br />
– ORION No. 900002 (inner chamber)<br />
– ORION No. 900003 (outer chamber)<br />
Burette, (25-mL) / (visual method only)<br />
Magnetic stirrer / (visual method only)<br />
<strong>Processing</strong> KODAK Motion Picture Films, Module 3, Analytical Procedures H24.03 3<br />
(N)<br />
Reproducibility<br />
Standard<br />
Deviation, 1S c<br />
(g/L CD-2)<br />
95 Percent<br />
Confidence<br />
Estimate<br />
(g/L CD-2)<br />
2.8652 16 0.006 ± 0.013<br />
2.5678 16 0.014 ± 0.030<br />
3.3712 16 0.020 ± 0.043