AMPEROMETRIC DETERMINATION OF TIN WITH CUPFERRON

Technical Report · Tue Apr 01 04:00:00 EST 1958

OSTI ID:4315990

Yamamura, S S; Rein, J E; Booman, G L

Distillation of tin tetrabromide followed by an amperometric titration with cupferron is specific for the determination of tin(IV). Because large amounts of bromide and chloride interfere with the amperometric titration the tin in the distillate is precipitated with ammonia using an aluminum hydroxide carrier. The precipitate is dissolved in sulfuric acid, adjusted to 3M ammonium sulfate and titrated with cupferron amperometrically at --0.64 volts vs. silver- silver chloride, saturated potassium chloride electrode. Ten fold and greater mole ratios of such elements as copper, iron, molybdenum, niobium, titanium, tungsten, uranium, vanadium, and zirconium give no bias. As much as a 100 to 1 mole ratio of zirconium can be tolerated making the method especially attractive for determining tin in zirconium matrix alloys such as zircaloy. For 0.09 millimoles of tin determined, the coefficient of variation is 0.45%. (auth)

• Research Organization: Phillips Petroleum Co. Atomic Energy Div., Idaho Falls, Idaho
• DOE Contract Number: AT(10-1)-205
• NSA Number: NSA-12-011307
• OSTI ID: 4315990
• Report Number(s): IDO-14436
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM HYDROXIDES-- AMINES-- AMMONIA-- AMPEROMETRY-- CHEMICALS-- CHLORIDES-- COPPER-- CUPFERRON-- DISTILLATION-- ELECTRIC POTENTIAL-- ELECTROCHEMISTRY-- ERRORS-- POTASSIUM CHLORIDES-- PRECIPITATION-- QUALITATIVE ANALYSIS-- QUANTITATIVE ANALYSIS-- QUANTITY RATIO-- SILVER-- SILVER CHLORIDES-- SOLUBILITY-- SULFATES-- SULFURIC ACID-- TIN-- TIN BROMIDES
CHEMISTRY
IRON-- MATRICES-- MOLYBDENUM-- NIOBIUM-- TITANIUM-- TUNGSTEN-- URANIUM-- USES-- VANADIUM-- ZIRCALOY- - ZIRCONIUM-- ZIRCONIUM ALLOYS