SVIBOR - Papers quoted in CC - project code: 3-04-322
MINISTRY OF SCIENCE AND TECHNOLOGY
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tel.: +385 1 459 44 44, fax: +385 1 459 44 69
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Papers quoted in Current Contents on project 3-04-322
Quoted papers: 11
Other papers: 72
Total: 83
Title: Refinement of parameters in differential scanning
calorimetric purity determinations
- Authors:
- Bezjak, Aleksandar (3466)
- Grdinić, Vladimir (14312)
- Cetina-Čižmek, Biserka (121030)
Journal: Acta Pharmaceutica
Number: 3
ISSN: 1330-0075
Volume: 42
Year: 1992
Pages: from 239 to 250
Number of references: 17
Language: engleski
Summary: A method has been developed for the refinement of
parameters inthe determination of purity of substances by lowering the
meltingpoint and by applying Van t Hoff s equation. The parameterscovered
by the refinement are: molar ratio of impurity (x2), areacorrection under
the melting curve (Ac) and the temperature ofmelting point of pure
substance (To). The refinement proceeds intwo steps: (i) the determination
of initial values by one of thepreviously developed procedures, and (ii)
the refinement ofinitial values by applying the total differential of Van t
Hoff sfunction with To, Ac and x2 as independent variables.
Keywords: Refinement, differential scanning calorimetry, purity determination, molar ration of impurity, melting curve, temperature of melting point, matematical model
Title: Electronic effects of co-ordinated methoxide on the rate
of entry of imidazole derivatives into
(dimethyl-3,7,12,17)-tetramethyl-8,13-divinylporphyrin-2,18-dipropanoato(2)
(methanol)methoxocobalt(III) in methanol
- Authors:
- Ašperger, Smiljko
- Vrban, G
- Cetina-Čižmek, Biserka (121030)
- Orhanović, M
Journal: Journal of Chemical Society Dalton Transaction
Number: 7
ISSN: 0300-9246
Year: 1991
Pages: from 1847 to 1849
Number of references: 14
Language: engleski
Summary: The rates of replacement of MeOH by imidazoe derivates
in(CoIIIL(MeO)(MeOH))
(L=dimetil-3,7,12,17-tetrametil-8,13-divinil-porfirin-2,18-dipropa noat).
The most basic derivative entersmost slowly, as was previously observed for
pyridine derivatives.The energies and entropies of activation of the
overall reactionwith piridine (py), and imidazole (Him), are Ea/kJ
mol-1=40.0+-3.1 (py) i 76.4+-3.8 (Him), and delta
S+/JK-1mol-1=-105+-10(py), and 13.2+-12.8 (Him). It is inferred that the
transitionstate in the reaction with py is stabilized by sigma and
partialmetal-to-ligand pi bonding, while the reaction with
imidazoleinvolves sigma bonding only.
Keywords: kinetics, imidazole, cobalt-protoporphyrins
Title: Statistical evaluation of FAAS microsampling system:
analysis of Cd(II)-ion Delves cup
- Authors:
- Grdinić, Vladimir (14312)
- Luterotti, Svjetlana (26936)
Journal: Acta Pharmaceutica
Number: 2
ISSN: 1330-0075
Volume: 44
Year: 1994
Pages: from 171 to 181
Number of references: 17
Language: engleski
Summary: FAAS Delves cup determination of Cd(II)-ion has proved to
be amethod applicable to routine work, after being subjected
tomathematic-statistical standardization procedure suggested byGottschalk.
Limitations of the method are discussed.
Keywords: cadmium determination, Gottschalk s standardization, atomic, absorption spectrometry, methodology validation, good measurement practices, application software
Title: Rapid and simple method for the determination of copper,
manganese and zinc in rat liver by direct flame atomic absorption
spectrometry
- Authors:
- Luterotti, Svjetlana (26936)
- Žanić-Grubić, Tihana
- Juretić, Dubravka
Journal: Analyst
Number: 2
ISSN: 0003-2654
Volume: 117
Year: 1992
Pages: from 141 to 143
Number of references: 18
Language: engleski
Summary: Flame atomic absorption spectrometry is successfuly applied
tothe simultaneous determination of copper, manganese and zinc inrat liver.
The proposed method involves only a few steps forsample pre-treatment at
room temperature, making the risk ofsystematic errors very small. The
detection limit was found to be0.04, 0.03 and 0.04 mgL-1 for Cu, Mn and Zn,
respectively.
Keywords: copper, manganeze and zinc determination, rat liver, atomic absorption spectrometry, sample homogenization, direct standardization
Title: Detection of edetates in aqueous medium and human urine by
resin spot test
- Authors:
- Luterotti, Svjetlana (26936)
Journal: Analusis
ISSN: 0365-4977
Volume: 19
Year: 1991
Pages: from 107 to 110
Number of references: 20
Language: engleski
Summary: A new analytical system for detecting therapeutically
anddiagnostically important edetates is decribed. The method isbased on the
complexing action of edetate anion to remove ferriion from ferrioxamine B
immobilized on Dowex HCR(H+) resin.Decomposition of the coloured chelate
leads to a gradual fadingof the deep brown-violet resin beads. The
identification limitfor anhydrous Na2H2EDTA is 0.9 micrograms in aqueous
medium and1.9 micrograms in original urine. Reliable, rapid and
simplemonitoring of edetate elimination is possible if a matrix test isused
as a reference.
Keywords: resin spot test, EDTA detection, human urine, complexing action, desferrioxamine B
Title: Hydroxamic acids in the analysis of ionic vanadium and
iron (review article)
- Authors:
- Luterotti, Svjetlana (26936)
Journal: Reviews in Analytical Chemistry
Number: 3
ISSN: 0048-752
Volume: 11
Year: 1993
Pages: from 195 to 267
Number of references: 267
Language: engleski
Summary: The analytical application of vanadium(V)-
andiron(III)-hydroxamate systems are reviewd, from the standpoint ofthe use
of hydroxamic acids as an analytical reagents for thedetection and
determination of these two metal ions.
Keywords: hydroxamic acids, iron and vanadium analysis, hydroxamate analytical systems, review
Title: Importance of factors for ruggedness test in phase
solubility analysis
- Authors:
- Grdinić, Vladimir (14312)
- Jakševac-Mikša, Maja (17861)
- Bezjak, Aleksandar (3466)
- Briški, Darije (162656)
- Briški, Darije (162656)
Journal: European Journal of Pharmaceutical Sciences
ISSN: 0928-0987
Volume: 2
Year: 1994
Pages: from 293 to 296
Number of references: 14
Language: engleski
Summary: The ruggedness test is carried out by deliberately
varyingfactors: weight of sample, solvent composition, bath
temperature,agitation time, agitation speed, aliquot of clear solution
andother. The simple factorial experiments can be applied todevelope
aprocedure for routine determinations of the purity of asubstance through
the application of precise solubilitymeasurements.
Keywords: ruggedness test, phase solubility analysis, identifying sources of trouble, chemical reference substances, azithromycin dihydrate, chemometrics
Title: Determination of kinetic parameters for nucleation and
growth from DTA data
- Authors:
- Bezjak, Aleksandar (3466)
- Stefanini-Orešić, Laila (35161)
- Ivanković, H.
- Ereš, M.
Journal: Thermochimica Acta
Number: 1
ISSN: 0040-6031
Volume: 221
Year: 1993
Pages: from 23 to 39
Number of references: 16
Language: engleski
Summary: A mathematical model has been derived for non-isothermal
kineticanalysis from overlapped exotherm and endotherm DTA effectsoccuring
due to simultaneous nucleation and growth precesses.
In the course of the mathematical treatment the refinement of theinitial
values of the kinetic parameters is performed.
The procedure for the determination of kinetic parameters fromDTA has been
demonstrated on a model system and on a kineticanalysis of mullite
formation from diphasic gel.
Keywords: nucleation process, crystal growth processes, kinetic parameters determination, differential thermal analysis, mathematical model, chemometrics
Title: Chemiluminometric determination of choline-related
substances in pharmaceutical prepartions by dot-blot
- Authors:
- Luterotti, Svjetlana (26936)
- Maysinger, DuŠica
Journal: Journal of Pharmaceutical and Biomedical Analysis
Number: 9
ISSN: 0731-7085
Volume: 12
Year: 1994
Pages: from 1083 to 1090
Number of references: 32
Language: engleski
Summary: Simple and reliable method of assaying choline-related
substancesin pharmaceutical preparations, based on conversion to choline,is
provided by combination of chemiluminometry of choline andodt-blot
technique. Favourable results obtained inpreparations-matched media,
including limits of detection of37-39 pmol/ul of choline chloride, is
further evidence of thesuitability of the method.
Keywords: choline-chemiluminometry, Dot-blot method, direct standardization, pharmaceutical analysis, succinylcholine chloride, choline theophyllinate, acetylcholine chloride
Title: Matrix effects in the determination of zinc(II) ion in
whole rat liver by flame atomic absorption spectrometry
- Authors:
- Luterotti, Svjetlana (26936)
Journal: Analyst
Number: 3
ISSN: 0003-2654
Volume: 120
Year: 1995
Pages: from 925 to 930žD
Number of references: 24
Language: engleski
Summary: Analytical systems that might be practical importance for
the direct determination of Zn(II) ion in whole rat liver homogenates by
flame atomic absorption spectrometry were reliably evaluated based on the
change in calibration sensitivity. For that purpose synthetic samples were
prepared in three extremely different media for tissue
homogenization.Hydrochloric acid medium proved to be more resistant to
matrix components than water or Tris-acetate buffer (pH 8.7). Further, a
highly acidic medium allows the substitution of complex albumin and
salt-containing standard solutions with simple acidic and even aqueous
solutions. The convenience of 1.0 mol/l HCl as the medium for rat liver
homogenisation is emphasized, owing not only to quantitative extraction of
metal ions but also to markedly reduced matrix effects.
Keywords: zinc determination, matrix effects, rat liver, flame atomic absorption spectrometry
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