Kinetic spectrophotometric determination of low levels of nitrite by catalytic reaction between pyrogallol red and bromate

Talanta ◽  
1993 ◽  
Vol 40 (9) ◽  
pp. 1375-1378 ◽  
Author(s):  
Ali A. Ensafi ◽  
M. Samimifar
Keyword(s):  
Spectrophotometric Determination ◽  
Catalytic Reaction ◽  
Pyrogallol Red ◽  
Low Levels ◽  
Kinetic Spectrophotometric

Kinetic-spectrophotometric determination of chromium(VI) by the oxidation of pyrogallol red

The Analyst ◽  
1985 ◽  
Vol 110 (6) ◽  
pp. 719 ◽  
Author(s):  
J. Medina-Escriche ◽  
A. Sevillano-Cabeza ◽  
M. de la Guardia-Cirugeda
Keyword(s):  
Spectrophotometric Determination ◽  
Pyrogallol Red ◽  
Chromium Vi ◽  
Kinetic Spectrophotometric

Kinetic-spectrophotometric determination of manganese and vanadium + manganese by oxidation of pyrogallol red

The Analyst ◽  
1984 ◽  
Vol 109 (10) ◽  
pp. 1303 ◽  
Author(s):  
A. Sevillano-Cabeza ◽  
J. Medina-Escriche ◽  
M. de la Guardia-Cirugeda
Keyword(s):  
Spectrophotometric Determination ◽  
Pyrogallol Red ◽  
Kinetic Spectrophotometric

Spectrophotometric Determination of Raceophenidol in Feed at Very Low Levels

1968 ◽  
Vol 51 (4) ◽  
pp. 752-755
Author(s):  
Edward L Pratt ◽  
Morris E Auerbach
Keyword(s):  
Spectrophotometric Determination ◽  
Growth Promotion ◽  
Ultraviolet Spectrum ◽  
Average Value ◽  
Collaborative Studies ◽  
Low Levels ◽  
Concentration Levels

Abstract Raceophenidol in feed at concentration levels intended for growth promotion of poultry can be estimated by a curvature inversion measurement related to the ultraviolet spectrum of derived p-methylsulfonylbenzaldehyde. The drug can be accurately measured at the 0.0005% level. Collaborative studies on the method showed an average value of 94 ± 10% of claim. The method is recommended for adoption as official, first action.

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