Developing a Method for Determination of Urinary Delta-Amino-Levulinic Acid using Molecularly Imprinted Polymers

Delta-amino-levulinic acid (ALA) has been introduced as a biological exposure index for workers exposed to lead. In this study, a new analytical method has been developed using molecularly imprinted polymers (MIPs) in microextraction by packed sorbent for urine samples. A spectrophotometric analysis was carried out for urine samples. Fourier transform infrared spectroscopy was used to determine the main constituents of MIPs. The optimized method was fast, sensitive, selective, easy to use and friendly to the environment.

Spectrophotometric Study of the Interaction of Platinum(IV) with New Derivatives of Azolidones

The interaction of Pt(IV) ions with the new derivatives of azolidones by spectrophotometric method was investigated. The spectrophotometric method for the determination of Pt(IV) using 5-hydroxyimino-4-imino-1,3-thiazolidine-2-one at pH 5.0 in acetate buffer medium was elaborated. The proposed method was tested by determination of Pt(IV) in model solutions and metallic alloy.

Mixed Ligand Complex of Lanthanum(III) and Alizarine-Complexone with Fluoride in Micellar Medium for Spectrophotometric Determination of Total Fluorine

A technique for direct spectrophotometric determination of total fluorine in products for oral hygiene using a mixed ligand complex La(III) and alizarin-complexone with fluoride ion in the presence of a non-ionic surfactant has been developed. A number of complexes of different stoichiometry formed in the system has been found. The La:alizarin-complexone:F- = 1:2:1 complex was shown to be used as an analytical form. The complex in the presence of Tween 80 is characterized by the molar absorptivity ε620 = 11000 mol∙dm-3∙cm-1.

Spectrophotometric Determination of Polyphenols in Green Teas with 18-Molybdodiphosphate

The reactivity of 18-molybdodiphosphate heteropoly complex (18-MPC) with respect to the polyphenolic compounds contained in green teas was estimated. The one- and two-electron heteropoly blues coexist depending on the ratio of reducing agent to 18-MPC in such reactions. The results for the determination of total content of polyphenols in green teas of different brands obtained with 18-MPC and FolinCiocalteu reagent are close to each other. The disadvantages of the existing methods are shown.


The integral components of wastewaters from chemical and petrochemical enterprises are monocyclic aromatics (benzene, toluene, ethylbenzene, xylene, phenol and their derivatives). The toxic effect of these compounds turns out in violations of the activity of the human endocrine and central nervous system, the change in the species and trophic structure of biocenoses.

Peculiarities of Osmium Compounds Interaction with Some Flavonoids

The interaction of Os(IV) ions with morin, quercetin, luteolin has been investigated and the spectrophotometric methods of osmium determination using these reagents have been elaborated. The influence of various factors and the maximum yield of the products of Os(IV) ions interaction with flavonoids have been determined.

Quantitative Determination of Hysroxycinnamic Acids in Chicory Root

The possibility for applying of a direct spectrophotometry to quantify totality of hydroxycinnamic acid derivatives is investigated. As a quantitative criterion for quality assessment of chicory roots the total content of hydroxycinnamic acid derivatives of at least 0.3%, expressed as chlorogenic acid, is suggested.

Specrophotometric Investigation of Palladium(II) Ions Interaction with 5-Hydroxyimino-4-imino-1,3-thiazolidin-2-one

The interaction of Pd(II) ions with 5-hydroxyimino-4-imino-1,3-thiazolidin-2-one (HITO) in water solution has been investigated. The optimum conditions of the complexation for the complex of palladium(II) with 5-hydroxyimino-4-imino-1,3-thiazolidin-2-one were found. The composition of еру complex was determined. The method of spectrophotometric determination of palladium(II) ions with HITO was developed.

Eriochrome Black T – a New Analytical Reagent for Spectrophotometric Determination of Sulphanilamides

Optimal conditions of the sulphanilamides diazonium salts interaction with o,o'-dihydroxysubstituted azo dye eriochrom black T have been defined. Therefrom the method of spectrophotometric determination of ten sulphanilamides in finished medicinal forms has been developed. This method is based on the azocoupling reaction of the sulphanilamide diazo salt with one of the products of the redox destruction of azo dye with formation of a colored azo compound.

Spectrophotometric Investigation of Cu(II) Ions Interaction with 1-(5-Benzylthiazol-2-yl)azonaphthalen-2-ol

The creation of Cu2+ ions chelate complex with 1-(5-benzylthiazol-2-yl)azonaphthalen-2-ol has been investigated using spectrophotometric methods. The optimal conditions for the complexation reaction and for extraction into the organic phase were found. The extraction-photometric method of copper microquantities determination was developed.