Processing kodak motion picture films, module 3 analytical procedures

Recovery
Recovery is used instead of bias for “seasoned” samples,
since the component concentration level was not determined
independently of the test method. It is defined as the
calculated mean for the seasoned sample, which contains the
standard addition minus the mean of the “seasoned” sample,
divided by the actual amount of the standard addition. It is
expressed as a percentage.
For the Process ECN-2, KUL “fresh” tank bleach sample,
the recovery (96.8 percent) was not statistically different
from 100 percent.
For the Process ECP-2, KUL “fresh” tank bleach sample,
the recovery (100.3 percent) was not statistically different
from 100 percent.
Reproducibility
Customer Standard Deviation, 1sc & 95 Percent
Confidence Estimate (not including bias)
The customer standard deviation (1sc )is an estimate of the
variability a customer could expect when submitting a
sample to any Photoprocessing Quality Services laboratory,
where any trained analyst could test the sample using any
instrument on any day.
The 95 percent confidence estimate (calculated using the
customer standard deviation) around a single test result will
include the mean value 95 percent of the time.
Two EASTMAN Color Films, Process ECN-2, “KUL”
bleach samples were analyzed by four trained analysts, using
multiple calibrated spectrophotometers, on two different
days. Duplicate analyses were performed on each sample, on
each of two days. These samples were:
a. A “fresh” tank solution prepared at 4.937 g/L total iron.
b. An EASTMAN Color Films, Process ECN-2, “KUL”
“seasoned” bleach tank sample analyzed, as received, in
the same manner as the “fresh” bleach.
Samples
(Process
ECN-2,
“KUL”
Bleach)
“Fresh” at
“Aim”
(4.937 g/L
Total Iron)
“Seasoned”,
As
Received
Mean
Level
(g/L Total
Iron)
Three EASTMAN Color Films, Process ECP-2, “KUL”
bleach samples were analyzed by four trained analysts, using
multiple calibrated spectrophotometers, on two different
days. Duplicate analyses were performed on each sample, on
each of two days. These samples were:
a. A “fresh” bleach tank solution prepared at 8.712 g/L
total iron with all components at their respective
working tank “aim” concentrations.
b. An EASTMAN Color Films, Process ECP-2, “KUL”
“seasoned” bleach tank sample analyzed, as received at
10.442 g/L total iron, in the same manner as the “fresh”
bleach.
c. The same “seasoned” solution, as in number b above,
analyzed after making an analytically weighed, standard
addition of 2.0032 g/L Total Iron.
Samples
(Process
ECP-2,
“KUL”
Bleach)
“Fresh” at
“Aim”
(8.712 g/L
Total Iron)
“Seasoned”,
As
Received
“Seasoned”
with
Standard
Addition
2 Processing KODAK Motion Picture Films, Module 3, Analytical Procedures H24.03
(N)
Reproducibility
Standard
Deviation, 1S c
(g/L Total Iron)
95 Percent
Confidence
Estimate
(g/L Total
Iron)
4.992 16 0.11 ± 0.23
3.634 16 0.072 ± 0.15
Mean
Level
(g/L Total
Iron)
(N)
Reproducibility
Standard
Deviation, 1S c
(g/L Total Iron)
95 Percent
Confidence
Estimate
(g/L Total
Iron)
8.716 16 0.11 ± 0.23
10.441 16 0.013 ± 0.28
12.349 16 0.15 ± 0.32