Polarographic determination of nitrate in concentrated sulphuric acid solutions

Zirconium is completely precipitated by benzoylphenylhydroxylamine from 0.5 N acid solutions. The complex formed in sulphuric acid solutions has a constant composition, Zr(C13H10O2N)4, and is used for the direct weighing of zirconium; the factor is 0.0970. The product precipitated from hydrochloric acid solutions must be ignited to the oxide. The reaction is sensitive, 1 p.p.m. of zirconium being detectable, and quantitative determination of 0.2 mg is possible. Thorium and the rare earths do not interfere.

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The application of DPASV to the determination of the low temperature solubility of lead sulphate in sulphuric acid solutions

Canadian Journal of Chemistry ◽

10.1139/v79-161 ◽

1979 ◽

Vol 57 (9) ◽

pp. 974-981 ◽

Cited By ~ 2

Author(s):

Eugene M. L. Valeriote ◽

Lloyd D. Gallop ◽

Pedro J. Aragon

Keyword(s):

Sulphuric Acid ◽

Pure Water ◽

Differential Pulse ◽

Lead Ion ◽

Acid Solutions ◽

Lead Acid Battery ◽

Emf Measurements ◽

Lead Sulphate ◽

Standard Enthalpy Of Solution

Measurements of the solubility of lead sulphate in 35% by weight sulphuric acid, pure water, and at two intermediate acid concentrations have been made over the temperature range 25 °C to −50 °C using differential pulse anodic stripping voltammetry.Values of the standard enthalpy of solution, derived from the data and from that of other workers, have been found to be higher than those obtained from emf measurements. The extent of lead sulphate ion pairing is analyzed at 25 °C and discussed. The slowness of equilibration of acid solutions supersaturated with lead sulphate was judged of importance in deciding the relevance of the use of thermodynamically calculated lead ion concentrations with respect to lead acid battery mechanisms.

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Umetric determination of persulphate in sulphuric acid solutions by permanganate

Analytica Chimica Acta ◽

10.1016/0003-2670(61)80086-x ◽

1961 ◽

Vol 24 ◽

pp. 415-418 ◽

Cited By ~ 5

Author(s):

Yugul Kishore Gupta

Keyword(s):

Sulphuric Acid ◽

Acid Solutions

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THE POLAROGRAPHIC DETERMINATION OF TIN IN HIGH PURITY ZINC AND ZINC DIE-CASTING ALLOYS

Canadian Journal of Research ◽

10.1139/cjr47b-035 ◽

1947 ◽

Vol 25b (3) ◽

pp. 322-330 ◽

Cited By ~ 1

Author(s):

R. C. Hawkings ◽

D. Simpson ◽

H. G. Thode

Keyword(s):

Hydrogen Peroxide ◽

Sulphuric Acid ◽

High Purity ◽

Die Casting ◽

Polarographic Determination ◽

Casting Alloys ◽

Accuracy And Precision ◽

High Degree ◽

Copper Lead

A procedure has been developed for the determination of tin in high-purity zinc and zinc die-casting alloys present in amounts from 0.001 to 0.2%. The samples are dissolved in sulphuric acid, oxidized with hydrogen peroxide, precipitated with cupferron, redissolved and reduced, and finally the tin is determined polarographically. By this method, the tin can be determined with an accuracy of ± 2.0% when present in amounts less than 0.005%. A method is now available for the routine polarographic determination of trace amounts of copper, lead, cadmium, and tin in high-purity zinc and zinc die-casting alloys with a high degree of accuracy and precision.

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Determination of small quantities of volatile organic acids in sulphuric-acid solutions

Bureau of Standards Journal of Research ◽

10.6028/jres.006.009 ◽

1931 ◽

Vol 6 (1) ◽

pp. 169 ◽

Cited By ~ 2

Author(s):

D.N. Craig

Keyword(s):

Organic Acids ◽

Sulphuric Acid ◽

Acid Solutions ◽

Volatile Organic ◽

Volatile Organic Acids

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POLAROGRAPHIC DETERMINATION OF TITANIUM IN PAINT PIGMENTS

Canadian Journal of Research ◽

10.1139/cjr50f-011 ◽

1950 ◽

Vol 28f (5) ◽

pp. 128-133 ◽

Cited By ~ 2

Author(s):

B. R. Potts

Keyword(s):

Tartaric Acid ◽

Acid Medium ◽

Sulphuric Acid ◽

Polarographic Determination ◽

Routine Testing ◽

Accuracy And Precision

A simple, rapid polarographic procedure for the determination of titanium in paint pigments has been developed, using a sulphuric acid – tartaric acid medium. The accuracy and precision of the method are satisfactory for routine testing operations. The interference of other common pigment ingredients is discussed, and a procedure suggested for the removal of copper and antimony prior to analysis.

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