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

1947 ◽  
Vol 25b (3) ◽  
pp. 322-330 ◽  
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.

scholarly journals The Polarographic Determination of Small Amounts of Tin in Zinc Die Casting Alloys.

1952 ◽  
Vol 6 ◽  
pp. 1217-1222 ◽  
Author(s):  
Alfreds J. Sietnieks ◽  
Erik Vasseur ◽  
I. Werner ◽  
Ernst Finsnes ◽  
Jörgine Stene Sörensen ◽  
...  
Keyword(s):  
Die Casting ◽  
Polarographic Determination ◽  
Casting Alloys

The polarographic determination of aluminium in zinc-base die-casting alloys

1957 ◽  
Vol 16 ◽  
pp. 194-200 ◽  
Author(s):  
J.A. Page ◽  
D.H. Simpsonb ◽  
R.P. Graham
Keyword(s):  
Die Casting ◽  
Polarographic Determination ◽  
Casting Alloys

POLAROGRAPHIC DETERMINATION OF TITANIUM IN PAINT PIGMENTS

1950 ◽  
Vol 28f (5) ◽  
pp. 128-133 ◽  
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.

A Modified Semi-automated Resorcinol Method for the Determination of Inulin

1969 ◽  
Vol 15 (11) ◽  
pp. 1072-1078 ◽  
Author(s):  
Thomas H Steele
Keyword(s):  
Present Method ◽  
Protein Precipitation ◽  
Accuracy And Precision ◽  
Precipitation Procedure ◽  
High Degree ◽  
Automated Methods ◽  
Resorcinol Method ◽  
Urine Specimens

Abstract A semi-automated resorcinol method for the determination of inulin in plasma and urine specimens, using standard AutoAnalyzer modules, is described. Plasma and other protein-containing fluids undergo a preliminary manual protein precipitation procedure. The deproteinized specimens are processed at a rate of 50/hr, with a high degree of accuracy and precision. The superiority of the present method is largely due to the elimination of small acid-resistant pump tubes from the manifold. This is possible because reagents are premixed prior to aspiration into the system, allowing simplification of manifold design over other automated methods.

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