Selective spectrophotometric determination of periodate based on its reaction with methylene green and its application to indirect determination of ethylene glycol and glycerol

2010 ◽  
Vol 76 (1) ◽  
pp. 29-32 ◽  
Author(s):  
Ghadamali Bagherian ◽  
Mansour Arab Chamjangali ◽  
Nasser Goudarzi ◽  
Nafiseh Namazi
Keyword(s):  
Ethylene Glycol ◽  
Spectrophotometric Determination ◽  
Indirect Determination ◽  
Methylene Green

Spectrophotometric determination of iron(II) ferrozine complex for the indirect determination of phosphate

1981 ◽  
Vol 53 (6) ◽  
pp. 861-864 ◽  
Author(s):  
Fredrick. Bet-Pera ◽  
Amit K. Srivastava ◽  
Bruno. Jaselskis
Keyword(s):  
Spectrophotometric Determination ◽  
Indirect Determination

Spectrophotometric determination of trivalent cerium with feriin in the presence of tetravalent cerium

1984 ◽  
Vol 49 (11) ◽  
pp. 2458-2462 ◽  
Author(s):  
Josef Novák ◽  
Pavel Vyhlídka ◽  
Vladimír Kohout ◽  
Bohumil Hájek
Keyword(s):  
Relative Error ◽  
Spectrophotometric Determination ◽  
Cerium Dioxide ◽  
Indirect Determination ◽  
Trivalent Cerium ◽  
Tetravalent Cerium

A method is suggested for the indirect determination of cerium(III) ions in the presence of a high excess of tetravalent cerium. Ce(III) is oxidized to Ce(IV) by tris(1,10-phenanthroline)iron(III) complex (ferriin) in the presence of sodium diphosphate, and the purple-red iron(II) complex (ferroin) formed is determined photometrically at 530 nm. Trivalent cerium can be so determined in quantities of 0-400 μg/50 ml with a relative error of ±3.5%. Cerium(III) was determined in commercial cerium(IV) sulphate and cerium dioxide preparations.

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