scholarly journals Application of the reaction of oxidation of N-methyl-p-aminophenol with hydrogen peroxide, catalyzed by Fe(II) and Fe(III) ions in flow-injection analysis of tap water

2020 ◽  
Vol 64 (12) ◽  
pp. 76-82
Author(s):  
Alena Yu. Likhacheva ◽  
◽  
Igor M. Fitsev ◽  
Alexander M. Sayfutdinov ◽  
Aysulu Z. Mukharlyamova ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Catalytic Reaction ◽  
Iron Content ◽  
Tap Water ◽  
Analytical Signal ◽  
Total Iron ◽  
Total Iron Content ◽  
Spectrophotometric Detection

The article presents the results of the application of the oxidation reaction of N-methyl-p-aminophenol with hydrogen peroxide, catalyzed by Fe(II) and Fe(III) ions in the flow injection analysis (FIA) of tap water. Using a commercially available system for FIA with spectrophotometric detection, an optimal scheme for conducting an indicator catalytic reaction in a liquid stream was proposed, which was used to determine the total iron content in tap water. Spectrophotometric detection of colored products of the indicator catalytic reaction of the oxidation of N-methyl-p-aminophenol with hydrogen peroxide is carried out at the absorption maximum of the absorption spectrum in the visible region at λmax = 490 nm. It was shown that, under nonequilibrium FIA conditions, it is possible to significantly minimize the contribution of the noncatalytic reaction to the total analytical signal. The latter is accompanied by the expansion of the range of determined catalyst contents to lower concentrations. Taking into account the proposed FIA scheme for determining the total iron content in tap water by the oxidation of N-methyl-p-aminophenol with hydrogen peroxide, catalyzed by Fe(II) and Fe(III) ions, the linearity range of the analytical signal remains in the range of 0.05-0.4 μg/ml. The lower limit of the determined iron content is 0.02 μg/ml with a productivity of 40 samples per hour. Sample preparation of tap water consists in filtering and maintaining the required pH for the catalytic indicator reaction and subsequent FIA. The cations Al, Zn, Ni, V(V), Pb, Cd, Mn(II), and Cr(VI) do not have a significant interfering effect; only the presence of complexing agents can reduce the rate of the catalytic reaction, which, accordingly, affects the analysis results.

Clay mineralogy of parent materials derived from uppermost Cretaceous and Tertiary sedimentary rocks in southern Saskatchewan

1993 ◽  
Vol 73 (4) ◽  
pp. 447-457 ◽  
Author(s):  
W. E. Dubbin ◽  
A. R. Mermut ◽  
H. P. W. Rostad
Keyword(s):  
Organic Carbon ◽  
Iron Content ◽  
Sedimentary Rocks ◽  
Clay Mineralogy ◽  
Total Iron ◽  
Total Iron Content ◽  
Parent Materials ◽  
Surface Areas ◽  
General Chemical ◽  
Detailed Chemical

Soils developed from parent materials derived from uppermost Cretaceous and Tertiary sedimentary rocks have been delineated from those which do not contain any of these younger sediments. The present study was initiated to determine the validity of this delineation. Parent materials from six locations in southwestern Saskatchewan were collected to determine their general chemical and physical properties. Clay fractions from each of these six parent materials were then subjected to detailed chemical and mineralogical analyses. The two parent materials containing the greatest amount of post-Bearpaw bedrock sediments (Jones Creek, Scotsguard) were characterized by substantially more organic carbon and less CaCO3. The presence of coal and the absence of carbonates in local bedrocks were considered to be the source of these deviations. In general, fine clays were comprised of 64–69% smectite, 14–21% illite and 10–13% kaolinite and coarse clay contained 32–39% smectite, 25–34% illite and 11–14% kaolinite. An exception was found in two fine clays which had less smectite but 3–6% vermiculite. Total iron content of the fine clays ranged from 7.16 to 8.11% expressed as Fe2O3. However, only a small fraction of this iron was extractable using the CDB technique. There were no substantial differences in surface areas or CECs of the clay fractions. Despite minor differences in the chemistry and mineralogy of these six parent materials, a separation of the soil associations does not appear to be warranted. Key words: Parent materials, uppermost Cretaceous, Tertiary, bedrock, clay mineralogy

Multisyringe flow injection analysis (MSFIA) for the automatic determination of total iron in wines

2019 ◽  
Vol 277 ◽  
pp. 261-266 ◽  
Author(s):  
Piyawan Phansi ◽  
Kaewta Danchana ◽  
Sergio L.C. Ferreira ◽  
Víctor Cerdà
Keyword(s):  
Flow Injection ◽  
Flow Injection Analysis ◽  
Total Iron ◽  
Automatic Determination ◽  
Multisyringe Flow Injection Analysis

scholarly journals Newly Developed System For The Analysis Of Micro Quantites Of Molybdenum (VI) Using Flow Injection Analysis

2007 ◽  
Vol 4 (2) ◽  
pp. 180-190
Author(s):  
Baghdad Science Journal
Keyword(s):  
Hydrogen Peroxide ◽  
Acid Medium ◽  
Conventional Method ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Better Than

New microphotometer was constructed in our Laboratory Which deals with the determination of Molybdenum (VI) through its Catalysis effect on Hydrogen peroxide and potasum iodide Reaction in acid medium H2SO4 0.01 mM. Linearity of 97.3% for the range 5- 100 ppm. The repeatability of result was better than 0.8 % 0.5 ppm was obtanined as L.U. (The method applied for the determination of Molybdenum (VI) in medicinal Sample (centrum). The determination was compared well with the developed method the conventional method.

Sign in / Sign up

Export Citation Format

Share Document