A method for the qualitative analysis of aromatic hydrocarbons in air and their various urinary metabolites is presented. The air was sampled in charcoal tubes and extracted with carbon disulfide. The hydrocarbons were identified as being aliphatic hydrocarbons (C(9)-C(19)), aromatic hydrocarbons and heterocyclic compounds. The urinary metabolites after enzymatic hydrolysis were analyzed by sol...

A method based on the linear model of sorption dynamics (LMSD) is applied for the comparison of several solid phase extraction systems used for preconcentration of phenol from water solutions. The method includes the calculation of maximum concentration efficiency for the given values of preconcentration factor and recovery under scope of the model. Original parameters of LMSD were obtained fro...

E’evated polyamine concentrations in human urine and serum appear to be associated with the presence of many types of cancer. The automated amino acid analyzer lends itself to the rapid separation and measurement of these substances with little sample handling and excellent reproducibility. The ion-exchange resin used was Beckman’s PA-35 (strong sulfonic acid cation exchanger, copolymerization ...

A clear and powerful chromatographic approach to purify polyethylene glycol derivatives at a preparative scale was reported, which was based on the polystyrene-divinylbenzene beads with ethanol/water as eluants. The validity of this method was verified with the reaction mixture of mPEG-Glu and mPEG propionaldehyde diethylacetal (ALD-PEG) as the model. The target products were one-step achieved ...

The swelling behaviour of poly(styrene-co-divinylbenzene), P(S-DVB), ion exchange resins in 1-butanol (BuOH) has been studied by means of atomistic classical molecular dynamics simulations (MD). The topological characteristics reported for the resin in the dry state, which exhibited complex internal loops (macropores), were considered for the starting models used to examine the swelling induced...

This work presents the results of synthesis granular copolymers acrylonitrile with hexahydro-1,3,5-triacrylyltriazine and their modification organic amines, in particular diethylamine, as well a study physicochemical characteristics sorption properties obtained ion exchangers. The result was exchangers necessary based on divinylbenzene, N,N´-methylene-bis-acrylamide hexahydro-1,3,5-triacrylyltr...