Polaragraphic Determination of Ferrous and Ferric Ion in Refractory Minerals

1956 ◽  
Vol 28 (1) ◽  
pp. 97-98 ◽  
Author(s):  
G. S. Bien ◽  
E. D. Goldberg
Keyword(s):  
Ferric Ion ◽  
Refractory Minerals

The determination of ferrous and ferric iron in rocks and minerals–a comment

1985 ◽  
Vol 49 (350) ◽  
pp. 101-102 ◽  
Author(s):  
R. D. Gillard
Keyword(s):  
Ferric Iron ◽  
Ferric Ion

AbstractHey's observation of reduction of ferric ion bound to 1,10-phenanthroline in water is explained in terms of the analogy between quaternization of the ligand and its coordination by iron(III).

Automated and Manual Direct Methods for the Determination of Blood Urea

1965 ◽  
Vol 11 (6) ◽  
pp. 624-627 ◽  
Author(s):  
Walton H Marsh ◽  
Benjamin Fingerhut ◽  
Henry Miller
Keyword(s):  
Acid Solution ◽  
Direct Methods ◽  
Weak Acid ◽  
Ferric Ion ◽  
Diacetyl Monoxime ◽  
Colored Product

Abstract Automated and manual direct methods for the determination of urea in blood or serum are described. These methods determine urea by the colored product formed when urea, in relatively weak acid solution, reacts with diacetyl monoxime in the presence of thiosemicarbazide and ferric ion. Results are compared with those obtained by urease conversion of urea to ammonia and measurement of the ammonia by nesslerization.

A Simplification and Improvement in the Determination of Copper in Fabrics and Rubberized Materials

1932 ◽  
Vol 5 (3) ◽  
pp. 356-359
Author(s):  
F. Kirchhof
Keyword(s):  
Nitric Acid ◽  
Colorimetric Method ◽  
Test Solution ◽  
Ferric Ion ◽  
The Past ◽  
Equivalent Quantity ◽  
Determination Of Copper

Abstract The determination of small quantities of copper in fabrics and in rubberized materials can be simplified by destruction with concentrated nitric acid, which accelerates the ignition to the final ash. At the same time, this method avoids the usual danger of volatilization of copper as chloride as a result of the presence of chlorine from white factice or from cold vulcanization. Likewise, precipitation of the copper as sulfide can be avoided by repeating the precipitation of the extract from the ash, which contains predominantly aluminum and iron, with ammonia. In this second precipitation, only around 1 to 2 per cent of the total quantity of copper is retained in the precipitate and filter, and this quantity may in most cases be neglected. The ordinary colorimetric method used in the past for the detection of copper as complex cuprammonium ion can be made about ten times as sensitive by making use of the reaction: Cu+ + + 2I− → CuI + I. This is, however, applicable only in the complete absence of the ferric ion and of nitric acid in the test solution. The sensitivity can be increased still more by the addition of starch. Another advantage of the determination of copper by measurement of the equivalent quantity of iodine lies in the fact that, if necessary, only one-tenth as much sample need be used, but in this case as in all such determinations, the copper must be distributed uniformly throughout the material to be analyzed.

A least-squares error minimization approach in the determination of ferric ion diffusion coefficient of Fricke-infused dosimeter gels

2005 ◽  
Vol 32 (4) ◽  
pp. 1017-1023 ◽  
Author(s):  
Y. J. Tseng ◽  
Sung-Cheng Huang ◽  
W. C. Chu
Keyword(s):  
Diffusion Coefficient ◽  
Least Squares ◽  
Ferric Ion ◽  
Error Minimization ◽  
Ion Diffusion ◽  
Minimization Approach

scholarly journals Gravimetric determination of sulfate after masking ferric ion with EDTA

1964 ◽  
Vol 13 (6) ◽  
pp. 544-547 ◽  
Author(s):  
Masakichi NISHIMURA ◽  
Makoto SAITO ◽  
Yasumitsu UZUMASA
Keyword(s):  
Ferric Ion ◽  
Gravimetric Determination

Quantitative determination of ferrous and ferric ion using Moessbauer effect

1968 ◽  
Vol 40 (3) ◽  
pp. 603-605 ◽  
Author(s):  
Toru. Yoshioka ◽  
Yoichi. Goshi ◽  
Hiroko. Kohno
Keyword(s):  
Quantitative Determination ◽  
Ferric Ion
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