Temat: skład olejów - Katalog OPAC zbiorów

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Tytuł:: Zastosowanie chromatografii bibułowej do identyfikacji spoiw olejnych w zabytkowych obiektach polichromowanych
THE USE OF PAPER CHROMATOGRAPHY IN IDENTIFYING OIL BINDING AGENTS IN POLYCHROMED HISTORIC OBJECTS
Autorzy:: Jaworski, Grzegorz
Mirowska, Elżbieta
Poksińska, Maria
Powiązania:: https://bibliotekanauki.pl/articles/535579.pdf
Data publikacji:: 1978
Wydawca:: Narodowy Instytut Dziedzictwa
Tematy:: farby olejne
chromatografia bibułowa
skład olejów
wysychanie olejów
identyfikacja spoiw olejnych
Opis:: The method comprises the identification of oils in dried-up oil films. The following four oils used as binding agents in painting were studied: linseed oil, poppy-seed oil, nut oil and oil made from the egg yolks. The method is based on a different relation between palmitine acid and stearic acid in the above-listed oils. A separation of isolated saturated fatty acids was carried out by means o f paper chromatography. The quantitative interpretation of chromatograms was made after a densitometric method. The method was successfully employed to identify oils in samples taken from polychromed historic works of art. The samples were 10—30 mg in size.
Źródło:: Ochrona Zabytków; 1978, 3; 175-181
0029-8247
Pojawia się w:: Ochrona Zabytków
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Zastosowanie chromatografii cienkowarstwowej do oznaczania spoiw olejnych
THE USE OF THIN-LAYER CHROMATOGRAPHY IN THE DETERMINATION OF OIL BLNDERS
Autorzy:: Baczko, Krystyna
Powiązania:: https://bibliotekanauki.pl/articles/535766.pdf
Data publikacji:: 1981
Wydawca:: Narodowy Instytut Dziedzictwa
Tematy:: zastosowanie chromatografii cienkowarstwowej do oznaczania spoiw olejnych
chromatografia cienkowarstwowa
identyfikacja spoiw malarskich
identyfikacja spoiw olejnych
analiza chromatograficzna cienkowarstwowa w badaniu spoiw białkowych i węglowodanowych
skład i budowa chemiczna spoiw olejnych
spoiwa olejne
analiza jakościowa olejów
Opis:: The present work made at a scientific-research laboratory of the State Enterprise for Conservation of Art was aimed at identifying oil binders by means of thin-layer chromatographic analysis. The work presented a survey of techniques employed in the determination of lipids by means of chromatographic analysis on the painted material. The procedure o f the identification of oil binders was worked out on this basis, which made it possible to implement it in conservation practices. Samples o f oils such as linseed oil (cold-pressed), poppy-seed oil (sun-dried, made by Winsor-Newton) and oil coming from the egg yolk were hydrolyzed in the solution o f KOH in methanol at room temperature. After neutralizing, the samples were extracted with chloroform. Solutions of individual oils were then put on chromatograms. Silicon gel (Kieselgel 60) was used as an adsorbent. Gel- covered glass plates (20 x 20 cm or 20 x 50 cm in size, made by Merck), were activated thermically. A number of developing systems were examined, out of which naptha oil: ethyl ether: acetic acid (80:20:1) was considered as optimum. Iodine pairs associated with sulfuric acid proved to be the best developer. The sensitivity of such a methodical procedure was defined at 10~4 g. Basing on the results of the studies, the above procedure was used for painting techniques containing oil binders: non-yellowing medium, traditional medium, oil-casein distemper, yolk distemper, distemper with arabie gum. The effect of various siccatives and inhibiting (cinnabar) and catalyzing (white lead) agents on the results o f determinations was studied in the process o f drying after prior artificial aging of samples. The method obtained makes possible to distinguish the oil technique from yolk and oil-resin techniques.
Źródło:: Ochrona Zabytków; 1981, 1-2; 86-92
0029-8247
Pojawia się w:: Ochrona Zabytków
Dostawca treści:: Biblioteka Nauki

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