Processing kodak motion picture films, module 3 analytical procedures
Processing kodak motion picture films, module 3 analytical procedures Processing kodak motion picture films, module 3 analytical procedures
4 Processing KODAK Motion Picture Films, Module 3, Analytical Procedures H24.03
Titrimetric Determination of Buffer Capacity of Accelerator Solution ECN-2-755 ECR-755A Process ECN-2 ECP-2D VNF-1/LC RVNP Formulas SR-31 — AB-3 AB-3 INTRODUCTION Each process accelerator solution is buffered to a different pH. Buffer curves indicate that the optimum pH range for measuring buffering capacity is between pH 3.50 and pH 6.00. The buffer capacity is measured in terms of the volume of base required to change the pH from 3.5 to 6.0, and is expressed in terms of glacial acetic acid, mL/L, or sodium acetate, g/L. This method requires handling potentially hazardous chemicals. Consult the Material Safety Data Sheet for each chemical before use. MSDS's are available from your chemical supplier. RELIABILITY Process ECN-2—Four standard mixes were prepared containing 0.0, 10.0, 20.0, and 30.0 mL/L glacial acetic acid. They were analyzed in duplicate by three analysts in one laboratory The 95 percent confidence limits for a single determination are ± 0.20 mL/L glacial acetic acid. Process VNF-1/RVNP—Four standard mixes were prepared containing 0.0, 6.89, 10.34, and 13.79 mL/L glacial acetic acid. They were analyzed in duplicate by three analysts in two laboratories. The 95 percent confidence limits for a single determination are ± 0.07 mL/L glacial acetic acid. SPECIAL APPARATUS pH Meter Reference Electrode, Ceramic Junction, Calomel, Corning No. 476002, Beckman No. 38423 or equivalent (Filled with 3.5 M potassium chloride solution) Indicator Electrode, glass (pH), Rugged Bulb, Corning No. 476024 or equivalent 25 and 50-mL Burets Note: Use pipets and volumetric glassware meeting the “Class A” definition by the National Institute of Standards and Technology (NIST). REAGENTS Use ACS Reagent Grade reagents unless specified otherwise. 1 N Sodium Hydroxide, NaOH (standardized to 4 decimal places) 1.0 N Sulfuric Acid, H 2SO 4 PROCEDURE Meter Preparation 1. Follow Method ULM-191-2, pH Measurement of Photographic Processing Solutions, to prepare the pH meter for making measurements below pH 9. Titration 1. Pipet (wipe the pipet before leveling) the sample size below into a beaker containing a magnetic stirrer. Process Beaker Size Sample Size ECN-2, AB-2 200 mL 50.0 mL VNF-1/RVNP, AB-3 400 mL 100.0 mL 2. Immerse the electrode assembly in the sample solution and start stirring. 3. Using 1.0 N sulfuric acid, adjust the pH of the sample to pH 3.5 (this volume does not have to be measured). 4. Using the buret size indicated below, titrate the sample to pH 6.00 with standardized 1 N sodium hydroxide. Record the volume of titrant used. Process Buret ECN-2, AB-2 50 mL VNF-1/RVNP, AB-3 25 mL 5. Remove the sample and rinse the electrode assembly with distilled water. If rinsing does not completely remove sample deposits, wipe the assembly with a cleansing tissue and rerinse. Place the electrode assembly in pH 4.01 potassium acid phthalate buffer for storage. Calculations ECN-2, AB-2 Buffer Capacity, mL/L = 1.22(N NaOH)(mL NaOH) – 0.52 VNF-1/RVNP, AB-3 Buffer Capacity, mL/L = 0.65(N NaOH)(mL NaOH) – 1.79 Buffer Capacity, g/L * = 0.94(N NaOH)(mL NaOH) – 2.6 * As sodium acetate. Note: One gram of sodium acetate is equivalent to 0.689 mL of glacial acetic acid. Processing KODAK Motion Picture Films, Module 3, Analytical Procedures H24.03 1
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- Page 3 and 4: ECP-2-1101 Ferrocyanide in Ferricya
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- Page 9 and 10: Potentiometric Determination of Bro
- Page 11 and 12: PROCEDURE B For Seasoned Tank and R
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- Page 15 and 16: APPARATUS All volumetric glassware
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- Page 23: PROCEDURE A. Sample Treatment 1. Pi
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- Page 29 and 30: Titrimetric Determination of EASTMA
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- Page 39 and 40: CALCULATIONS For Na3Fe(CN) 6 g/L Na
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- Page 49 and 50: APPARATUS Pipet (40-mL) Graduated C
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- Page 71 and 72: APPARATUS Double Beam Spectrophotom
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4 <strong>Processing</strong> KODAK Motion Picture Films, Module 3, Analytical Procedures H24.03
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