Processing kodak motion picture films, module 3 analytical procedures

Calculation of Absorptivity
Absorptivity (ABU-L/g-cm) =
Where:
Example
ABS std # x df
Iron Stock Conc.
ABS std # = recorded absorbance for each standard
measured at 477 nm
df = dilution factor for corresponding standard
1000 mL 100 mL
x
3.0 mL pipet size
Iron Stock Conc. = calculated amount of iron in iron wire
stock solution (refer to section on
Preparation of 10 g/L Iron Stock
Solution.)
Absorptivity (ABU-L/g-cm) =
0.330 x 6666.7
= 205.7
10.695
Typical Absorptivity
mL Diluted Stock Absorbance Absorptivity
3.0 0.192 204.85
3.0 0.195 204.05
3.0 0.194 206.99
5.0 0.322 206.13
5.0 0.319 204.21
5.0 0.322 206.13
10.0 0.638 204.21
10.0 0.642 205.49
10.0 0.641 205.17
15.0 0.955 203.78
15.0 0.953 203.36
15.0 0.958 204.42
x = 205.2
s = 1.4
Figure 1 Calibration of Total Iron in ECN-2 or ECP-2
“KUL” Bleach
0.00
0
F002_0937AC
6 Processing KODAK Motion Picture Films, Module 3, Analytical Procedures H24.03
Absorbance @ 447 nm
1.20
1.00
0.80
0.60
0.40
0.20
2
4
ABSORBANCE
6
mL Diluted Stock
8
10
12
14
16
18
20