scholarly journals On-site Catalytic Determination of Trace Chromium(VI) in Fresh Water Using o-Phenylenediamine–Hydrogen Peroxide Reaction

2012 ◽  
Vol 61 (2) ◽  
pp. 103-108
Author(s):  
Junpei SHINDO ◽  
Susumu KAWAKUBO ◽  
Takashi YAMANOI ◽  
Yasutada SUZUKI
Keyword(s):  
Hydrogen Peroxide ◽  
Fresh Water ◽  
Catalytic Determination ◽  
Chromium Vi

Chemiluminescence determination of chromium(VI), molybdenum(VI), and vanadium(V) with bis-(2,4,6-trichlorophenyl) oxalate and perylene

1982 ◽  
Vol 47 (6) ◽  
pp. 1606-1612 ◽  
Author(s):  
Záviš Holzbecher ◽  
Lubomír Kábrt ◽  
Lubomír Janšta
Keyword(s):  
Hydrogen Peroxide ◽  
Standard Deviation ◽  
Oxygen Transfer ◽  
Methyl Acetate ◽  
Catalytic Effect ◽  
Metal Salts ◽  
Experimental Conditions ◽  
Chromium Vi ◽  
Relative Standard

The effect of the experimental conditions (pH, ionic strength, hydrogen peroxide concentration) and of various metal salts on the chemiluminescence occurring during oxidation of bis-(2,4,6-trichlorophenyl) oxalate (TCPO) with hydrogen peroxide in the presence of perylene was studied in water-methyl acetate solutions. The spectrum of the emitted radiation was found practically identical with the fluorescence spectrum of perylene. The observed catalytic effect of Cr(IV), Mo(VI), and V(V) on the chemiluminescence reaction in question can be explained so that these elements form peroxo acids with hydrogen peroxide, thereby facilitating the oxygen transfer from the latter to TCPO. Based on this phenomenon, a method is suggested for the determination of the above elements in concentrations about 10-3 to 10-4 mol l-1; its precision, represented by the relative standard deviation, is about 3-4%, the limits of determination of Cr(VI), Mo(VI), and V(V) are approximately 5-10 μg.

scholarly journals Determination of Kinetic Parameters in the interaction between Hydrogen Peroxide and Chromium (VI) Oxide

2017 ◽  
Vol 10 (06) ◽  
pp. 91-94
Author(s):  
Abdu M.S. ◽  
Faruq U.Z. ◽  
Aska, A.S ◽  
Dangoggo S.M. ◽  
Baraya K. A.
Keyword(s):  
Hydrogen Peroxide ◽  
Kinetic Parameters ◽  
Chromium Vi
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