scholarly journals Chemical Analysis through CL-Detection Assisted by Periodate Oxidation

2007 ◽  
Vol 2007 ◽  
pp. 1-10 ◽  
Author(s):  
Nicholaos P. Evmiridis ◽  
Athanasios G. Vlessidis ◽  
Nicholas C. Thanasoulias
Keyword(s):  
Chemical Analysis ◽  
Flow Injection ◽  
Research Work ◽  
Periodate Oxidation ◽  
Direct Determination ◽  
Good Reproducibility ◽  
Through Flow ◽  
Set Up ◽  
Simple Flow

The progress of the research work of the author and his colleagues on the field of CL-emission generated by pyrogallol oxidation and further application for the direct determination of periodate and indirect or direct determination of other compounds through flow-injection manifold/CL-detection set up is described. The instrumentation used for these studies was a simple flow-injection manifold that provides good reproducibility, coupled to a red sensitive photomultiplier that gives sensitive CL-detection. In addition, recent reports on studies and analytical methods based on CL-emission generated by periodate oxidation by other authors are included.

scholarly journals Flow injection analysis of water. Part 1: Automatic preconcentration determination of sulphate, ammonia and iron(II)/iron(III)

1993 ◽  
Vol 15 (4) ◽  
pp. 141-146 ◽  
Author(s):  
J. S. Cosano ◽  
M. D. Luque de Castro ◽  
M. Valcárcel
Keyword(s):  
Flow Injection ◽  
Good Reproducibility ◽  
Chemical Systems ◽  
Sequential Determination ◽  
On Line ◽  
Exchange Material ◽  
Iron Complexation ◽  
Simple Flow ◽  
Ammonia Formation

This paper describes a simple flow-injection (FI) manifold for the determination of a variety of species in industrial water. The chemical systems involved in the determination of ammonia (formation of Indophenol Blue), sulfate (precipitation with Ba(II)), and iron (complexation with 1,10-phenanthroline with the help of a prior redox reaction for speciation) were selected so that a common manifold could be used for the sequential determination of batches of each analyte. A microcolumn of a suitable ion exchange material was used for on-line preconcentration of each analyte prior to injection; linear ranges for the determination of the analytes at the ng/ml levels were obtained with good reproducibility. The manifold and methods are ready for full automation.

The Defect Structure of CdO

1987 ◽  
Vol 42 (6) ◽  
pp. 746-749 ◽  
Author(s):  
Jenő Juhász ◽  
Sarolta Igaz ◽  
Béla Jóvér ◽  
Zoltán G. Szabó
Keyword(s):  
Solid Solution ◽  
Chemical Analysis ◽  
Defect Structure ◽  
Direct Determination ◽  
Good Reproducibility ◽  
Heat Treated ◽  
Defect Sites

Abstract Defect Sites of CdO, Reducibility, Analysis Three procedures of chemical analysis are proposed for the direct determination of excess Cd in CdO: a spectrophotometric, a titrimetric and a gravimetric one, for 0-1500 ppm, 500-50,000 ppm and above 5%, respectively. The good reproducibility and reliability is illustrated by results referring to CdO samples heat-treated in H 2 and in air between 100 and 350 °C. Reduction in H2 increases the concentration of excess Cd up to 4000 ppm, above that separate Cd phase forms. The excess Cd in solid solution (interstitial sites) is more resistant against re-oxidation, than the bulk Cd phase.

Direct Determination of Phosphite in Fertilizers by Flow-Injection Amperometry

2007 ◽  
Vol 19 (17) ◽  
pp. 1794-1798 ◽  
Author(s):  
Vanessa Pezza Franzini ◽  
Cecílio Sadao Fugivara ◽  
Assis Vicente Benedetti ◽  
Clóvis Augusto Ribeiro ◽  
Eder Tadeu Gomes Cavalheiro ◽  
...  
Keyword(s):  
Flow Injection ◽  
Direct Determination

Determination of lead in whole blood with a simple flow-injection system and computerized stripping potentiometry

1988 ◽  
Vol 209 ◽  
pp. 339-343 ◽  
Author(s):  
L. Almestrand ◽  
M. Betti ◽  
Chi Hua ◽  
D. Jagner ◽  
L. Renman
Keyword(s):  
Flow Injection ◽  
Whole Blood ◽  
Injection System ◽  
Flow Injection System ◽  
Simple Flow

Determination of total CO2 in plasma by automated flow-injection analysis.

1979 ◽  
Vol 25 (3) ◽  
pp. 443-445 ◽  
Author(s):  
H Baadenhuijsen ◽  
H E Seuren-Jacobs
Keyword(s):  
Flow Injection ◽  
Flow Injection Analysis ◽  
Indicator System ◽  
Rubber Membrane ◽  
Analysis Technique ◽  
Membrane Technique ◽  
Silicone Rubber Membrane ◽  
Acid Reagent ◽  
Set Up

Abstract We describe a procedure for measuring total CO2 in plasma, based on the principles of the flow-injection analysis technique, which makes use of unsegmented fast-flowing reagent streams, as developed by Růziĉka and co-workers. The further methodological design resembles the silicone-rubber membrane technique of Kenny and Cheng. CO2 in the sample is released by reaction with H2SO4. Appropriate amounts of CO2 permeate through the membrane that separates the acid reagent streams and a buffered cresol-red indicator system. The experimental set-up and functioning of this system are described.

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