Volumetric Determination of Fluorine Involving Distillation from Sulfuric Acid Solution

1955 ◽  
Vol 27 (6) ◽  
pp. 998-1000 ◽  
Author(s):  
O. D. Smith ◽  
T. D. Parks
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Volumetric Determination

Separation and Determination of Trace Amounts of Tin Present as Organotin Residues on Fruits

1970 ◽  
Vol 53 (1) ◽  
pp. 140-146
Author(s):  
Homer B Corbin
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Extraction Method ◽  
Colorimetric Method ◽  
Separation Method ◽  
Measuring System ◽  
Accuracy And Precision ◽  
Spray Treatment

Abstract The dithiol colorimetric method has been applied to the determination of trace amounts of tin as residues from the spray treatment of fruit with a miticide containing tricyclohexyltin hydroxide. The samples are prepared by an initial wet combustion to give a sulfuric acid solution of tin in the inorganic form. The tin is separated from other elements in the acid digest by one of two methods. One involves distillation of stannic bromide with a mixture of HBr and HCl. In the second separation method stannic iodide is extracted into n-hexane. Both separation procedures result in a solution of tin in a few milliliters of concentrated H2SO4, which is then measured spectrophotometrically. Data are presented for sensitivity and precision of the measuring system; accuracy and precision of both separation methods are illustrated by duplicate analyses and recovery tests on apples and pears treated with various cyclohexyltin compounds and inorganic tin. The extraction method has been tested for compatibility with 35 elements. Only arsenic (>0.15 mg or 1.5 ppm) and antimony (>2 mg or 20 ppm) are likely to interfere. Procedures are given for elimination of greater amounts of these elements.

THE ACCURATE DETERMINATION OF CYANIDE BY DISTILLATION FROM SULFURIC ACID SOLUTION

1932 ◽  
Vol 54 (12) ◽  
pp. 4487-4489 ◽  
Author(s):  
H. Armin Pagel ◽  
Warner Carlson
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Accurate Determination

Determination of chlorine in concentrated sulfuric acid solution with a residual chlorine electrode

1979 ◽  
Vol 51 (8) ◽  
pp. 1332-1333 ◽  
Author(s):  
Kenny D. Brown ◽  
Gordon A. Parker
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Residual Chlorine ◽  
Concentrated Sulfuric Acid

Determination of the phase composition of anodic lead(II) film formed in sulfuric acid solution

1994 ◽  
Vol 368 (1-2) ◽  
pp. 43-46 ◽  
Author(s):  
Jun Han ◽  
Cong Pu ◽  
Wei-Fang Zhou
Keyword(s):  
Phase Composition ◽  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution
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