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Spectrophotometric characteristics and assay of pure pyronin Y


, : Spectrophotometric characteristics and assay of pure pyronin Y. Histochemistry 81(1): 99-101

The spectrophotometric characteristics of analytically pure pyronin Y have been investigated. Addition of metal ions (Fe3+, Zn2+, and Mg2+) and of dextrin were shown not to influence the absorption characteristics. The composition of the solvent strongly influenced the value of the extinction coefficient. Aqueous ethanolic solutions with a content of about 50% ethanol gave higher epsilon-values than those found for more concentrated ethanol solutions. The difference can be explained by the existence of a solvent-solute complex in the less concentrated ethanol solutions. A new spectrophotometric assay is proposed using the epsilon-value 11.7 X 10(4) lmol-1 cm-1 found in aqueous ethanol (52%) as standard.

US$29.90

PMID: 6469724


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Bartolozzi, L.; Ghahari, H.; Sprecher-Uebersax, E.; Zilioli, M., 2016: A checklist of stag beetles (Coleoptera: Scarabaeoidea: Lucanidae) from Iran. An updated checklist of the Lucanidae (Coleoptera) from Iran is given. New locality records are listed and some dubious distributional records are discussed. Dorcus vavrai Nonfried, 1905 is placed in synonymy with Dorcus peyronis Reiche and Saulcy...

Kneeland, Y., 1934: The Protection Afforded By Vaccination Against Secondary Invaders During Colds In Infancy. All intensive course of vaccination with the pathogenic bacteria of the upper respiratory tract modified favorably the winter outbreak of severe respiratory disease in an infant population. The incidence of the common cold was not affected. The si...

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Milne E.N.C., 1984: Cardiogenic and noncardiogenic pulmonary edema differential diagnosis by chest x ray. American Review Of Respiratory Disease Suppl: A111

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