26 KB138 KB25 KB199820252006Khadar, A. M. A.Varghese, Anithaštevilka:3letnik:537 stranistr. 374-380ISSN:1318-0207COBISSID:28084997URN:URN:NBN:SI:doc-E4BVNS93enSlovensko kemijsko društvoActa chimica slovenicaanalizna kemijakemijska analizakositerpovršinsko aktivne snovispektralna analizaspektrofotometrijazlitineHighly selective derivative spectrophotometric determination of tin (II) in alloy samples in the presence of cetylpyridinium chloride|A simple, selective and sensitive spectrophotometric method has been developed for the determination of tin(II) using a newly synthesised reagent diacetylmonoxime p-hydroxybenzoylhydrazone in cationic micellar medium. The molar absorptivity and Sandell's sensitivity of the coloured species are 3.20*104 L mol-1 cm-1 and 3.6 ng cm-2 respectively. Beer's law is obeyed between 0.25-2.76 g mL-1 of Sn(II)) at 430 nm. The stoichiometry of the complex was found to be 1Č2 (metal: ligand). A highly selective first order derivative spectrophotometric method for the determination of tin is also reported. The developed procedure has been successfully applied for the determination of tin in various alloy samples and synthetic mixtures of some low melting alloysRazvili smo enostavno, selektivno in občutljivo spektrofotometrično metodo za določevanje kositra(II) z uporabo novega sintetiziranega reagenta diacetilmonoksim p-hidroksibenzoil hidrazona v raztopini s kationskimi površinsko aktivnimi snovmi. Molarni ekstinkcijski koeficient pri valovni dolžini 430 nm in Sandellova občutljivost obarvanega kompleksa sta 3.20*104 L mol-1 cm-1 in 3.6 ng cm-2. Beerov zakon velja za koncentracijsko območje 0.25-2.76 g mL-1 Sn(II). Ugotovljeno je bilo stehiometrično razmerje kovina-ligand 1:2. Opisana je tudi derivativna spektrofotometrična metoda prvega reda z visoko selektivnostjo. Razvite postopke smo uspešno uporabili zadoločevanje kositra v različnih zlitinah in pripravljenih zmeseh zlitin z nizkim tališčemTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaSlovensko kemijsko društvo