Solvent extraction of blue perchromic acid by tertiary and quaternary amines

Sastri, M. N.; Sundar, D. S.

doi:10.1016/s0003-2670(01)84901-1

Cited by 8 publications

(2 citation statements)

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“…Spectrophotometric determination ofchromium(VI) as the familiar blue chromium-peroxo complex is well known [3,9,10]. The methods, however, lack sensitivity.…”

Section: Peroxopyridylazoresorcin-komplexmentioning

confidence: 99%

Spectrophotometric determination of chromium as the chromium-peroxo-4-(2-pyridylazo)resorcinol complex

Ferng

Parker

1980

Z. Anal. Chem.

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Spektralphotometrische Chrombesfimmung als Chrom-Peroxo-4-(2-pyridylazo)-resorcin-Komplex Zusammenfassung. Der tern/ire Chrom-Peroxo-PAR-Komplex weist einen scheinbaren molaren Extinktionskoeffizienten yon 6280 1-tool-1. cm-1 auf, wenn er aus 0,1 M schwefelsaurer L6sung mit Ethylacetat extrahiert wird. Das Beersche Gesetz wird bis zu 6,0 lag Cr/ml befolgt. Die Bedingungen ftir eine optimale Farbbildung, die Zusammensetzung des Komplexes, die Wirkung verschiedener Begleitionen und die Anwendung auf St/ihle werden beschrieben. Summary. The ternary complex chromium-peroxo-PAR exhibits an apparent molar absorptivity of 6280 1 mol-1 cm-1 when extracted into ethyl acetate from 0.1 M sulfuric acid solution. Beer's law is followed for solutions containing up to 6.0 lag Cr ml-1. Conditions for optimum color formation, complex composition, effects of diverse ions, and application to the determination of chromium in steels are described.

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“…Spectrophotometric determination ofchromium(VI) as the familiar blue chromium-peroxo complex is well known [3,9,10]. The methods, however, lack sensitivity.…”

Section: Peroxopyridylazoresorcin-komplexmentioning

confidence: 99%

Spectrophotometric determination of chromium as the chromium-peroxo-4-(2-pyridylazo)resorcinol complex

Ferng

Parker

1980

Z. Anal. Chem.

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“…There are many original research papers in which this was demonstrated. [ 18–24 ] Generally determination is based on the following process. The heavy metal ion is oxidized to a high valent anion (e.g.…”

Section: Introductionmentioning

confidence: 99%