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Investigation of complex equilibria in solutions of p-aminohippuric acid and tin (II) ion in perchlorate medium
dc.creator | Janković, Drina | |
dc.creator | Đokić, Divna Đ. | |
dc.date.accessioned | 2018-03-01T19:34:49Z | |
dc.date.available | 2018-03-01T19:34:49Z | |
dc.date.issued | 2004 | |
dc.identifier.issn | 0793-0135 | |
dc.identifier.uri | https://vinar.vin.bg.ac.rs/handle/123456789/2850 | |
dc.description.abstract | The complex equilibrium in tin (II)-p-aminohippuric acid (PAH) solutions in perchlorate medium was investigated. The interaction between Sn (II)-ion and PAH was studied with the purpose to establish whether PAH could form complex with, Sn (II)-ion during the labeling with technetium-99m. HPLC, spectrophotometric and pH-metric methods were used. Dissociation constants of PAH, thermodynamic parameters of PAH dissociation, as well as stability constant of tin (II)-PAH were determined. The values of thermodynamic dissociation constants of PAH were 4.25, 4.19 and 4.15 at 295, 302 and 310 K respectively. The calculated thermodynamic values DeltaGdegrees, DeltaHdegrees and DeltaSdegrees, were -24.01 KJ mol(-1), -12.44 KJ mol(-1) and 39.22 Jmol(-1) K-1 at 295 K respectively. Sn (II)-ion exhibits only a weak interaction with PAH in the pH range 2.0 divided by 3.7, e.g. in the Sn-PAH solution a weak complex with high degree of dissociation was obtained. The treatment of spectral data referring to Sn-PAH solutions indicates the formation of a mononuclear complex [SnPAH](+). Mathematical analysis of experimental data indicated that the best fit of the potentiometric data was achieved by assuming the formation of a mixed hydrolytic complex [Sn(OH)PAH]. The calculated value of the stability constant was: log beta(1,-1.1) = 0.95 +/- 0.11 at 298 K. | en |
dc.rights | restrictedAccess | en |
dc.source | Reviews in Analytical Chemistry | en |
dc.subject | PAH | en |
dc.subject | dissociation constant | en |
dc.subject | Sn (II)-ion | en |
dc.subject | complex formation | en |
dc.title | Investigation of complex equilibria in solutions of p-aminohippuric acid and tin (II) ion in perchlorate medium | en |
dc.type | article | en |
dcterms.abstract | Дјокиц, Д; Јанковић Дрина; | |
dc.citation.volume | 23 | |
dc.citation.issue | 2 | |
dc.citation.spage | 87 | |
dc.citation.epage | 105 | |
dc.identifier.wos | 000226643500001 | |
dc.citation.rank | M23 | |
dc.identifier.rcub | https://hdl.handle.net/21.15107/rcub_vinar_2850 |
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