A NEW CATALYTIC DETERMINATION OF COPPER(II) BY MEANS OF THE OXIDATIVE COUPLING REACTION OFp-HYDRAZINOBENZENE-SULFONIC ACID WITHm-PHENYLENEDIAMINE

1980 ◽  
Vol 9 (9) ◽  
pp. 1173-1176 ◽  
Author(s):  
Shigenori Nakano ◽  
Hitomi Enoki ◽  
Takuji Kawashima
Keyword(s):  
Oxidative Coupling ◽  
Sulfonic Acid ◽  
Coupling Reaction ◽  
Catalytic Determination ◽  
Oxidative Coupling Reaction ◽  
Determination Of Copper

scholarly journals SPECTROPHTOTOMETRIC DETERMINATION OF PURE SULFAMETHOXAZOLE IN PHARMACEUTICAL PREPARATIONS BY OXIDATIVE COUPLING REACTION

2021 ◽  
Vol 13 (1) ◽  
pp. 65-76
Author(s):  
Noor M. Ghaib Allah1 ◽  
Keyword(s):  
Correlation Coefficient ◽  
Spectrophotometric Method ◽  
Oxidative Coupling ◽  
Sulfonic Acid ◽  
Pharmaceutical Preparations ◽  
Coupling Reaction ◽  
Potassium Iodate ◽  
Oxidative Coupling Reaction ◽  
Sensitive Spectrophotometric Method

A new, simple, rapid and sensitive spectrophotometric method for the determination of sulfamethoxazole in both pure form and pharmaceutical preparations has been reported.The adapted technique based on utilization 4-aminobenzene sulfonic acid as a new modern chromogenic through an oxidative coupling reaction with sulfamethoxazole and potassium iodate in basic media to form orange soluble dye product with absorption maxima at 490 nm. Subject to Beer's law in the range 2–32μg mL-1. The values of molarabsorption coefficient (ε) and correlation coefficient were found to be 9.118 × 103 and0.9999 respectively whereas the Sandels index was 0. 02778 µg.cm-2

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