Kinetic Spectrophotometric Determination of Trace Aluminum by Catalytic Activity of Al 3+ on the Oxidation of Methylene Blue by Hydrogen Peroxide

2003 ◽  
Vol 143 (1) ◽  
pp. 53-57 ◽  
Author(s):  
Ren-Min Gong ◽  
Qiu-Yi Chen ◽  
Zhi-Li Liu
Keyword(s):  
Hydrogen Peroxide ◽  
Methylene Blue ◽  
Catalytic Activity ◽  
Spectrophotometric Determination ◽  
Kinetic Spectrophotometric

scholarly journals Kinetic spectrophotometric determination of Bi(III) based on its catalytic effect on the oxidation of phenylfluorone by hydrogen peroxide

2009 ◽  
Vol 74 (8-9) ◽  
pp. 977-984
Author(s):  
Sofija Rancic ◽  
Snezana Nikolic-Mandic
Keyword(s):  
Hydrogen Peroxide ◽  
Spectrophotometric Determination ◽  
Reaction Rate ◽  
Catalytic Effect ◽  
Limit Of Detection ◽  
Kinetic Method ◽  
Limit Of Quantification ◽  
Kinetic Spectrophotometric ◽  
Good Agreement

A new reaction was suggested and a new kinetic method was elaborated for determination of Bi(III) in solution, based on its catalytic effect on the oxidation of phenyl-fluorone (PF) by hydrogen peroxide in ammonia buffer. By application of spectrophotometric technique, a limit of quantification (LQ) of 128 ng cm-3 was reached, and the limit of detection (LD) of 37 ng cm-3 was obtained, where LQ was defined as the ratio signal: noise = 10:1 and LD was defined as signal 3:1 against the blank. The RSD value was found to be in the range 2.8-4.8 % for the investigated concentration range of Bi(III). The influence of some ions upon the reaction rate was tested. The method was confirmed by determining Bi(III) in a stomach ulcer drug ('Bicit HP', Hemofarm A.D.). The obtained results were compared to those obtained by AAS and good agreement of results was obtained.

Kinetic Spectrophotometric Determination of Ascorbic Acid in Pharmaceutical Samples by Oxidation of Ponceau 4R by Hydrogen Peroxide

2008 ◽  
Vol 55 (1) ◽  
pp. 137-142 ◽  
Author(s):  
Zora M. Grahovac ◽  
Snežana S. Mitić ◽  
Todor G. Pecev ◽  
Emilija T. Pecev ◽  
Aleksandra N. Pavlović
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Spectrophotometric Determination ◽  
Pharmaceutical Samples ◽  
Ponceau 4R ◽  
Kinetic Spectrophotometric
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