Processing kodak motion picture films, module 3 analytical procedures

CALCULATIONS
For Sodium Persulfate, g/L
g/L Na 2S 2O 8 =
Where:
(mLs B - mLs A) (N cerate) (eq wt Na 2 S 2 O 8 )
mL Sample
mLs B = volume of sulfato cerate in milliliters required to
reach the equivalence point without the
addition of sample (Blank)
mLs A = volume of sulfato cerate in milliliters required to
reach the equivalence point with the addition of
sample
N cerate = normality of the sulfato cerate in
milliequivalents per milliliter (meq/mL)
eq wt Na 2 S 2 O 8 = equivalent weight of sodium persulfate in
milligrams per milliequivalent
(119.05 mg/meq)
mL Sample = volume of sample pipetted in step 1 of part A of
procedure
If mL 0.0497 N sulfato cerate = 32.85 mLs
g/L Na 2S 2O 8 =
g/L Na 2 S 2 O 8 = 20.18
mLs Blank = 49.90 mLs
(49.90 - 32.85) (0.0497) (119.05
5.00
4 Processing KODAK Motion Picture Films, Module 3, Analytical Procedures H24.03