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Spectrophotometric Determination of Silver by New Azodyes Deriven From 2-Thiobarbituric Acid | ||
| Journal of Basrah Researches (Sciences) | ||
| Article 1, Volume 36, Issue 4, 2010, Pages 60-65 PDF (0 K) | ||
| Abstract | ||
| This study describe the use of new azodyes reagents 5-( 2,3- dihydro-1,4-phathalezindion- azo) -2-thiobarbituric acid ( L1 ) and 5-(2-thiobarbituric acid azo )-phenyl-4-acetic acid (L2) as sensitive and selective analytical reagents for the determination of Ag(I) spectrophotometrically. L1 and L2 react with Ag+ at pH ( 9 and 10 ) respectively to form colored complexes of 1 :2 stoichiometry which show a maximum absorbance of 540 and 425 nm. of molar ratio absorbitivity 0.59 X104 and 1.63 X104 l.mol-1.cm-1 respectively. fixed optimum conditions were constructed, precision , accuracy, R.S.D.and correlation factors. The Beers law was obeyed up to 25 and 7.56 ppm. respectively.The stability constants of complexes were determined. | ||
| Keywords | ||
| spectrophotometric; azodyes; Thiobarbituric acid; Silver complexes | ||
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