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27 results on '"von Mühlen, Carin"'

19. Nomenclatura na língua portuguesa em cromatografia multidimensional abrangente

Author

von Mühlen,Carin, Zini,Cláudia Alcaraz, and Caramão,Elina Bastos

Subjects
comprehensive two dimensional gas chromatography, comprehensive multidimensional chromatography, nomenclature
Abstract

Comprehensive Multidimensional Chromatography is a relatively new analytic technique, which is receiving growing attention in many parts of the world, including recently in Brazil. This work presents terms in Portuguese which are commonly used in Comprehensive Multidimensional Chromatography in order to help standardize the vocabulary employed in this area in the scientific literature. It also includes some symbols, their nominations, and explanation of some terms, whenever necessary. This proposal does not intend to be comprehensive or definitive; on the contrary, it intends to be a first step in the process of establishing a standardized nomenclature, serving as a base for a further sound discussion in the scientific community realm.

Published
2007

20. Nomenclatura na língua portuguesa em cromatografia multidimensional abrangente

Author

von Mühlen, Carin, Zini, Cláudia Alcaraz, and Caramão, Elina Bastos

Subjects
comprehensive two dimensional gas chromatography, comprehensive multidimensional chromatography, nomenclature
Abstract

Comprehensive Multidimensional Chromatography is a relatively new analytic technique, which is receiving growing attention in many parts of the world, including recently in Brazil. This work presents terms in Portuguese which are commonly used in Comprehensive Multidimensional Chromatography in order to help standardize the vocabulary employed in this area in the scientific literature. It also includes some symbols, their nominations, and explanation of some terms, whenever necessary. This proposal does not intend to be comprehensive or definitive; on the contrary, it intends to be a first step in the process of establishing a standardized nomenclature, serving as a base for a further sound discussion in the scientific community realm.

Published
2007

27. Identification of some plasticizers compounds in landfill leachate.

Author

do Nascimento Filho I, von Mühlen C, Schossler P, and Caramão EB

Subjects
Brazil, Chemical Precipitation, Chromatography, Ion Exchange, Plasticizers analysis, Refuse Disposal methods, Soil Pollutants analysis
Abstract

In this work it was described a simple method for extraction of plasticizer compounds (mainly phthalate esters and bisphenol A (BPA)) from landfill leachate samples. The samples were submitted to an extraction procedures based on precipitation, solid phase extraction (SPE) and ionic exchange chromatography (IEC). Firstly the landfill leachate sample was acidified by addition of HCl concentrated, in order to precipitate the organic compounds that are less soluble in water. The precipitate was washed with several solvents. The aqueous phase was then submitted to SPE with XAD-4 resin and IEC with Amberlyst A-27 resin. The instrumental analysis was performed by gas chromatography with mass spectrometer detector (GC/MSD) and the compounds were identified by the GC/MSD library (Wiley) and by using some standard substances. These methodologies allow the isolation and identification of the following compounds: dioctylphthalate, diisobutilphthalate, BPA, benzoic acid, palmitic acid and diisopentylphthalate. The methods are very simple, rapid and selective, for plasticizers extraction from landfill leachate matrices.

Published
2003
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