scholarly journals ÓLEOS ESSENCIAIS E VEGETAIS: MATÉRIAS-PRIMAS PARA FABRICAÇÃO DE BIOPRODUTOS NAS AULAS DE QUÍMICA ORGÂNICA EXPERIMENTAL

Química Nova ◽  
2021 ◽  
Author(s):  
Catarina Bruno ◽  
Márcia Almeida
Keyword(s):  
Organic Chemistry ◽  
Green Chemistry ◽  
Thin Layer ◽  
Essential Oils ◽  
Thin Layer Chromatography ◽  
Vegetable Oils ◽  
Raw Materials ◽  
Natural Dye ◽  
Class 1 ◽  
Layer Chromatography

ESSENTIAL AND VEGETABLE OILS: RAW MATERIALS FOR THE MANUFACTURE OF BIOPRODUCTS IN CLASSES IN EXPERIMENTAL ORGANIC CHEMISTRY. A schedule was prepared for three undergraduate classes for the discipline of experimental organic chemistry for obtaining bioproducts. As natural raw materials, lavender flowers and cinnamon peels were used to obtain hydrolates and essential oils (Class 1), coconut and avocado pulp to obtain vegetable oils and annatto seeds to obtain a natural dye (Class 2 ). Cosmetic bioproducts (Class 3), body emulsions similar to those found on the market, were obtained from the mixture of essential and vegetable oils and the addition of natural dye. The raw materials obtained can also be used in other classes of the discipline, complying with the principles of Green Chemistry. Essential oils, for example, can be used as samples for Thin Layer Chromatography (TLC) classes and vegetable oils for the production of biodiesel.

scholarly journals Determination of deoxynivalenol in feed, feed raw materials and food

2020 ◽  
Vol 64 (12) ◽  
pp. 28-33
Author(s):  
Nailya N. Mishina ◽  
◽  
Ivan N. Shtyrov ◽  
Zukhra H. Sagdeeva ◽  
Ramziya M. Potekhina ◽  
...  
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Russian Federation ◽  
Raw Materials ◽  
Food Products ◽  
Technical Documentation ◽  
Veterinary Services ◽  
The Russian Federation ◽  
Layer Chromatography

The article presents the survey data of 1830 average samples of feed, feed raw materials and food products received through the Test Center of the FSBSI «FCTRBS-RRVI»", provided by livestock and feed enterprises, agricultural companies, food manufacturers and 152 samples of feed provided by specialists of veterinary services , livestock enterprises, owners of peasant farms to determine the death of animals and birds, for the content of mycotoxin deoxynivalenol (DON) in the period from 2018 to 2020. Determination of the DON content in the samples was carried out according to a certified procedure based on the method of thin layer chromatography. In the course of summarizing the results, it was found that samples of feed, feed raw materials and food products received through the Test Center of the of the FSBSI «FCTRBS-RRVI» from different regions of the Russian Federation in terms of DON content corresponded to the normative indicators specified in the current regulatory and technical documentation. When determining the cause of death of animals and birds, 152 samples were examined, received from farms of different regions of the Republics of Tatarstan, Bashkortostan, Mordovia, Kostroma and Ryazan regions. It was found that 1.97% of samples were contaminated with DON at concentrations from 0.2 to 0.5 mg/kg of feed, in the rest, the content of mycotoxin was below the sensitivity of the method (< 0.2 mg/kg), which does not exceed the limit permissible concentration. It was recommended to exclude feed contaminated with mycotoxin from the diet of animals, since at the established concentrations, DON is not the main etiological factor in the death of animals, but due to the presence of carcinogenic, mutagenic, teratogenic, embryotoxic and immunosuppressive properties, together with other factors, it is contributing.

Purification of vetiver alcohols and esters for quantitative high-performance thin-layer chromatography determination in Haitian vetiver essential oils and vetiver acetates

2012 ◽  
Vol 1241 ◽  
pp. 103-111 ◽  
Author(s):  
Lionel Paillat ◽  
Christine Périchet ◽  
Jean-Philippe Pierrat ◽  
Sophie Lavoine ◽  
Jean-Jacques Filippi ◽  
...  
Keyword(s):  
Thin Layer ◽  
Essential Oils ◽  
Thin Layer Chromatography ◽  
High Performance ◽  
Layer Chromatography

Determination of 1,8-Cineole in Eucalyptus Essential Oils by Thin-Layer Chromatography and Densitometry

1995 ◽  
Vol 78 (1) ◽  
pp. 115-117 ◽  
Author(s):  
Carmen Rossini ◽  
Enrique Pandolfi ◽  
Eduardo Dellacassa ◽  
Patrick Moyna
Keyword(s):  
Liquid Chromatography ◽  
Thin Layer ◽  
Essential Oils ◽  
Thin Layer Chromatography ◽  
Mobile Phase ◽  
Light Petroleum ◽  
Gas Liquid Chromatography ◽  
Acid Reagent ◽  
Layer Chromatography

Abstract A thin-layer chromatography (TLC) method with scanning is described for evaluation of the 1,8-cineole content of Eucalyptus essential oils. Samples were developed on silica gel G 60 with light petroleum–chloroform (70 + 30) as mobile phase. Color was developed with 4-dimethylaminobenzal-dehyde–sulfuric acid reagent. The absorbance of colored spots was measured at 460 nm. The response was linear between 15 to 75 μg of 1,8-cineole, with a correlation coefficient of 0.9997. The results of each assay were compared with those from gas–liquid chromatography (GLC). The TLC to GLC ratio was constant (0.92).

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