The fingerprinting capacity of two analytical techniques, HPLC and UV–Vis spectroscopy in the case of fruits samples (kiwi and pomelo) has been investigated. The multivariate exploratory techniques were used for sample discrimination according to the fruit species and subspecies. The combination of principal component analysis with linear discriminant analysis is opening new directions in the fingerprinting analysis. The classifications obtained

The use of image analysis software for the detection and quantitative evaluation of fluorescent compounds in thin layer chromatography is investigated. Four different image analysis software packages (Sorbfil TLC, Biodit, JustTLC, and Melanie) were applied and compared. The image analysis methods were developed and validated for the simultaneous determination of quercetin and kaempferol in food supplements. The chromatographic separation used Silica

The lipophilicity of some hazardous substances (emerging pesticides and some PAHs) was investigated by high performance liquid chromatography, on four chromatographic columns of RP-18, RP-8, phenyl and CN, with two types of mobile phases based on acetonitrile and methanol. The investigated lipophilicity indices were both experimentally (log kw, S and u0) and theoretically expressed. In order to find an objective manner of quantitative comparison

The optimization of the green tea flavonoid extraction conditions was investigated. The experiments were carried out with two extraction methods: ultrasound assisted extraction (UAE) and reflux extraction (RE). The parameters that were varied in this study were: the extraction solvent system composition, the type of organic modifier of the extraction mixture, temperature, and time. The highest efficiency was obtained with an extraction mixture of

The lipophilicity of some emerging pesticides is investigated by reversed-phase high performance thin-layer chromatography (RP-HPTLC) on RP-18, RP-8 and CN stationary phases. The mobile phases were mixtures of methanol-water in different proportions of volume. The lipophilicity indices taken in consideration during this study are: RM0, mean of RF and RM, b, φ0, scores corresponding to the first principal components of RM and RF. The obtained results

Silica gel plates impregnated with a variety of oils (olive oil, sunflower oil, corn oil, trioctylamine, and paraffin oil) and fats (margarine, butter, cod liver fat, pig fat, sheep fat, pullet fat, and human fat) were evaluated and compared with the commercially available reversed-phases TLC plates (RP-18, RP-18 W, and CN). A representative series of flavonoids is employed to evaluate the suitability of oils and fats as reversed-phases for TLC and

A variety of oils (paraffin, olive, sunflower, corn, castor, cod liver) and fats (margarine, butter, pig, sheep, pullet, human) impregnated TLC-plates were indirectly evaluated and characterized from the lipophilicity point of view by employing a series of experimental lipophilicity parameters estimated for a representative group of natural sweeteners from retention data. The relevance of 10 the results was evaluated by a critical comparison of the

The chromatographic behavior of some artificial and natural sweeteners was established by reverse phase high performance thin-layer chromatography (RP-HPTLC) on RP-18, RP-18W, RP-8, CN and NH2 stationary phases. The mobile phases were mixtures of acetonitrile–water in different proportions of volume, chosen to create a suitable migration during the chromatographic process. The lipophilicity was described through different chromatographic descriptors

Silica gel plates impregnated with a variety of oils including vegetable oils (olive, sunflower and corn oil) and synthetic oils (trioctylamine and paraffin oil) were evaluated and compared with the commercially available reversed-phases TLC plates (RP-18, RP-18W, and CN). A series of selected lipophilic vitamins was employed to evaluate the suitability of oils as reversed-phases for TLC and to provide different lipophilicity indices: RM0, scores