Processing kodak motion picture films, module 3 analytical procedures

12. Press ‘ZERO’. The instrument will display “---”
followed by “0.00”.
13. Within 30 minutes after the 3 minute waiting period,
place the reagent sample cell prepared in step 5 into
the cell holder with the diamond mark facing the
keypad.
14. Tightly cover the reagent sample cell with the
instrument cap (flat side facing the back of the
instrument).
15. Press ‘READ’. The instrument will display “---”
followed by the results in mg/L iron.
CALCULATIONS
Multiply the mg/L iron reading (obtained in step 15, above)
by 5 to obtain the iron content of the sample in g/L:
g/L iron = (reading in mg/L iron from step 15) x 5000 fold dilution
1000 mg/g
g/L iron = (reading in mg/L iron from step 15) (5)
Example:
g/L iron = (0.89 mg/L) (5)
g/L iron = 4.45 g/L
Processing KODAK Motion Picture Films, Module 3, Analytical Procedures H24.03 3