Spectrophotometric determination of niobium with 4-(2-pyridylazo)resorcinol and colored complexes separated from oxalic and tartaric acid systems

1971 ◽  
Vol 43 (11) ◽  
pp. 1375-1378 ◽  
Author(s):  
Marija. Siroki
Keyword(s):  
Tartaric Acid ◽  
Spectrophotometric Determination ◽  
Colored Complexes

scholarly journals Thoron-Tartaric Acid Systems for Spectrophotometric Determination of Thorium

1956 ◽  
Vol 28 (5) ◽  
pp. 812-816 ◽  
Author(s):  
F. S. Grimaldi ◽  
M. H. Fletcher
Keyword(s):  
Tartaric Acid ◽  
Spectrophotometric Determination

scholarly journals Use of Π-Acceptors for Spectrophotometric Determination of Dicyclomine Hydrochloride

2003 ◽  
Vol 86 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Lories I Bebawy ◽  
Yosry M Issa ◽  
Kamal M Abdel Moneim
Keyword(s):  
Spectrophotometric Determination ◽  
Good Accuracy ◽  
Experimental Conditions ◽  
Chloranilic Acid ◽  
Colored Complex ◽  
Complex Species ◽  
Spectrophotometric Methods ◽  
Accuracy And Precision ◽  
Colored Complexes

Abstract Simple, rapid, accurate, and sensitive spectrophotometric methods are described for the determination of dicyclomine hydrochloride. The methods are based on the reaction of this drug as an n-electron donor with 2,3-dichloro-5,6-dicyano-p-benzoqunione (DDQ), p-chloranilic acid (p-CA), and chloranil (CL) as Π-acceptors to give highly colored complex species. The colored products are measured spectrophotometrically at 456, 530, and 650 nm for DDQ, p-CA, and CL, respectively. Optimization of the different experimental conditions were studied. Beer's law was obeyed in concentration ranges of 20–100, 50–250, and 80–600 μg/mL for DDQ, p-CA, and CL, respectively. Colored complexes are produced in organic solvents and are stable for at least 1 h. The methods were applied to Spasmorest™ antispasmotic tablets and ampoules with good accuracy and precision.

Spectrophotometric Determination of Total Cr in Water

2018 ◽  
Author(s):  
Xhulieta Hamiti ◽  
Ilirjana Boci ◽  
Pranvera Lazo
Keyword(s):  
Spectrophotometric Determination
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