Processing kodak motion picture films, module 3 analytical procedures

PROCEDURE B
For Seasoned Tank
Note: Prepare the double junction/silver billet electrode pair
and calibrate the electrode-instrument system according to
the instructions given in Method ULM-0003-01,
Potentiometric Titrations for Photoprocessing Solutions or
any subsequent revision.
Sample Treatment
(Bromide Enrichment)
1. Pipet, wipe before leveling, 100.0 mL of sample into a
250-mL Phillips beaker. Stir moderately on a magnetic
stirrer in an exhaust hood.
2. While stirring add very slowly, from a tip-up pipet, 50
mL of 18 N sulfuric acid to the Phillips beaker.
Warning
ACID. Avoid contact with skin and eyes. In case of
contact, flush with water.
3. Add approximately 0.2 grams of Celite to the Phillips
beaker. (One level scoop from a Coors No. 04
porcelain spatula is approximately 0.2 grams.)
4. Add, from a graduated cylinder, 23 mL of standardized
0.05 N silver nitrate to the solution as it stirs.
Immediately set a timer for five minutes and continue
to stir during that period.
5. As the solution stirs, assemble a Millipore filter holder
and filter membrane (type HAWP—0.45 micron
porosity, 47 mm) on a 250-mL filter flask.
6. At the end of the five-minute stirring period, connect
the aspirator hose and filter the solution through the
Millipore apparatus, retaining the stirring bar in the
Phillips beaker by means of another may-bar outside
the beaker. When filtering is completed, disconnect
the aspirator hose.
7. Rinse the sides of the Phillips beaker with 25 mL of
1.0 M ammonium nitrate from a tip-up pipet.
Retaining the stirring bar in the Phillips beaker, rinse
the sides of the Millipore funnel by pouring the
solution through a long, thin-stemmed glass funnel.
Reconnect the aspirator hose and filter the solution
into the 250-mL filter flask. Disconnect the aspirator
hose when the filtering is completed. Save both the
long-stemmed funnel and the Phillips beaker.
8. Remove the 250-mL filter flask from the Millipore
filter apparatus and discard the filtrate. Do not
disassemble the Millipore filter apparatus.
9. Rinse the inside and outside of the stem only of the
Millipore funnel with distilled water from a wash
bottle, and place the filter apparatus on a clean 250-mL
filter flask.
Silver Development
1. Add, from a graduated cylinder, 25 mL of silver-halide
developer to the 250-mL Phillips beaker.
Note: Do not expose the silver-halide developer to air any
longer than necessary When not in use, store the silverhalide
developer in a cool, dark place. A developer that has
turned brown should not be used. The developer is still
usable if it has a light tan color.
2. Swirl the Phillips beaker and immediately rinse the
sides of the Millipore funnel (with no applied suction)
by pouring the developer through the long-stemmed
funnel. Set a timer for five minutes and allow the
developer to remain in the Millipore funnel for that
period. At one-minute intervals, swirl the Millipore
funnel for several seconds.
3. During the five-minute period, add from a tip-up pipet,
25 mL of distilled water to the 250-mL Phillips beaker.
4. At the end of the five-minute period, connect the
aspirator hose and filter the solution into the clean 250mL
filter flask. (Care must be taken to prevent loss of
the filtrate through the aspirator hose.) With the
aspirator hose still connected, rinse the sides of the
Millipore funnel with the solution in the Phillips
beaker by pouring the solution through the longstemmed
funnel. Disconnect the aspirator hose when
the filtration is completed.
5. Quantitatively transfer the solution in the 250-mL
filter flask into a 400-mL beaker using a maximum of
100 mL of distilled water.
6. Stir the solution moderately on a magnetic stirrer in an
exhaust hood.
7. Add carefully from a tip-up pipet, 50 mL of 18 N
sulfuric acid to the beaker.
Warning
ACID. Avoid contact with skin and eyes. In case of contact,
flush with water.
Processing KODAK Motion Picture Films, Module 3, Analytical Procedures H24.03 3