Download or read book Chromatographie written by Encyclopaedia Universalis, and published by Encyclopaedia Universalis. This book was released on 2016-09-19 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: La chromatographie est une méthode d'analyse chimique (cf. chimie analytique ) consistant à séparer les constituants d'un mélange. Elle est utilisée aussi bien dans les services de recherche et développement que dans le domaine du contrôle. Son champ d'activité couvre les organismes d'État et le...

Download or read book Fundamentals and Techniques written by and published by Elsevier. This book was released on 2000-04-01 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals and Techniques

Download or read book Chemical Derivatization in Analytical Chemistry written by R. W. Frei and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the second volume in this senes we have continued the theme of Volume 1 and expanded more generally into separation and continuous flow techniques. The first chapter gives an account on flow injection analysis. Thi~ technique has gained considerable interest in the recent past and offers many facets of the use of chemistry in automated analysis procedures. One of these facets is certainly also the use of ion-pairing reactions, and we have been fortunate to get two well-known experts to treat this subject. The use of ion-pairing techniques is being discussed from a batch extraction (sample handling) point of view as well as for flow injection and chromato graphic purposes. Immobilized enzymes are another area of major attention and their multidirectional use in analytical chemistry is illuminated in Chapter 3 with special emphasis on their use in connection with liquid chromatography. Needless to say, similar techniques have also found their way into con tinuous-flow methodology (Auto-Analyzers) and many of the aspects dis cussed in Chapter 3 are adaptable to this end. The need and recent urgency for separation of optical isomers in many areas, particularly pharmaceutical and clinical analysis, has spurred a flurry of activity in this special section of chromatography. The current status of the field of optical isomer separation is competently reviewed in Chapter 4. Again this is a typical area wherein it is the proper use of chemistry that finally delivers a solution. The last two chapters deal with precolumn or prechromatographic derivatization techniques.

Download or read book Chemical Derivatization in Analytical Chemistry written by R. W. Frei and published by . This book was released on 2014-01-15 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analyse chimique written by Daniel Cruché and published by . This book was released on 2019-07-10 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage offre un panorama détaillé des méthodes d'analyse présentes dans des secteurs aussi variés que les industries chimiques ou agroalimentaires, les laboratoires d'analyses médicales, les sciences de l'environnement. Les aspects pratiques de chaque méthode sont associés aux notions scientifiques qui l'expliquent. Des exercices corrigés complètent chaque chapitre. Cette nouvelle édition entièrement actualisée tient compte des avancées technologiques les plus récentes. Des compléments sur les paramètres statistiques de base et les normes à connaître sont disponibles sur le site dunod. com.

Download or read book Supercritical Fluids in Chromatography and Extraction written by R. M. Smith and published by Elsevier Science Limited. This book was released on 1997 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the mid 1980s supercritical fluid chromatography (SFC) arose with considerable fanfare as the new technique which would shortly "displace HPLC" and become the "universal separation method". After the initial hype had passed, there has still remained a significant group of applications in both chromatography and extraction for which supercritical fluids are the most suitable solvents. These form the basis of this volume, which illustrates the present state of analytical supercritical technology by a collection of review and research papers. Many publications in this field have blurred the boundaries of supercritical fluids, claiming that they filled a gap between gases and liquids and "had the properties of both". This was never true and this book seeks a more rational view of the state of application of supercritical fluids as their position in the analytical laboratory becomes clearer. These papers emphasise that future chromatographers should not be compartmentalised into "gas chromatographers" or "liquid chromatographers" but should view the field as a series of merging separation techniques. The overall emphasis is on extraction methods, usually as a sample preparation method prior to HPLC or GC analysis, but in some cases the extract is examined directly as the analytical step. This bias on extraction methods reflects the impact of supercritical fluids in the working laboratory. It is therefore an area where advances can have the maximum benefit for the user. The papers on chromatography are diverse and adventurous, covering particularly chiral chromatography and metal complex analysis, where SFC offers particular advantages over existing methods. Rather than be a separate branch of chromatography or extractions it is clear that the use of solvents above their normal conditions of temperature and pressure, up to and including the supercritical state, will continue to expand the range of analytical methods as part of an overall spectrum of solubility, polarity and volatility properties of solvents and mobile phases. This volume is an important addition to this movement and will help to redress the lack of education in the theory and practice of sample preparation which has been a great limiting factor for SFC and SFE.

Download or read book Chemical Derivatization in Analytical Chemistry written by R. W. Frei and published by Springer. This book was released on 1982-08-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the second volume in this senes we have continued the theme of Volume 1 and expanded more generally into separation and continuous flow techniques. The first chapter gives an account on flow injection analysis. Thi~ technique has gained considerable interest in the recent past and offers many facets of the use of chemistry in automated analysis procedures. One of these facets is certainly also the use of ion-pairing reactions, and we have been fortunate to get two well-known experts to treat this subject. The use of ion-pairing techniques is being discussed from a batch extraction (sample handling) point of view as well as for flow injection and chromato graphic purposes. Immobilized enzymes are another area of major attention and their multidirectional use in analytical chemistry is illuminated in Chapter 3 with special emphasis on their use in connection with liquid chromatography. Needless to say, similar techniques have also found their way into con tinuous-flow methodology (Auto-Analyzers) and many of the aspects dis cussed in Chapter 3 are adaptable to this end. The need and recent urgency for separation of optical isomers in many areas, particularly pharmaceutical and clinical analysis, has spurred a flurry of activity in this special section of chromatography. The current status of the field of optical isomer separation is competently reviewed in Chapter 4. Again this is a typical area wherein it is the proper use of chemistry that finally delivers a solution. The last two chapters deal with precolumn or prechromatographic derivatization techniques.

Download or read book Analysis with Supercritical Fluids Extraction and Chromatography written by Bernd Wenclawiak and published by Springer. This book was released on 1992-11-03 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of supercritical fluids in analytical chemistry is still grow ing. More and more analysts are discovering the favorable advan tages for a number of applications. Especially supercritical fluid extraction (SFE) has attracted a lot of interest in recent years due to its simplicity. Supercritical fluid chromatography (SFC) has become better established and the development of this technique has been accelerated by the many applications with capillary col umns which have been published in the literature. At first SFC equipment was based on instruments commonly used for liquid chromatography, and the first commercial in struments were derived from this technology. However, capillary columns can be much more easily interfaced to gas chromatogra phy equipment especially to the detectors commonly used for Oc. Many stationary phases both for packed micro columns and capillary columns have been designed for SFC purposes extending this technology to LC and OC. The most common fluid applied in SFC and SFE is carbon dioxide. The advantages of supercritical CO , such as having dif 2 fusivity like a gas and solvating power depending on temperature and pressure, are also valid for other fluids and modified fluids. Both properties are valuable for sample extraction and extraction selectivity.

Download or read book Analyse chimique written by Francis Rouessac and published by . This book was released on 2009-06-03 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce livre s'adresse à un large public d'étudiants en Licences de Sciences de la Matière ou de Sciences de la Vie, en pharmacie, ainsi qu'en IUT. Il offre un panorama détaillé des méthodes d'analyse présentes dans des secteurs aussi variés que les industries chimiques, agroalimentaires, les laboratoires d'analyse médicale, les sciences de l'environnement. Le principe de ce cours est de relier les aspects pratiques de chaque méthode étudiée aux notions scientifiques qui l'expliquent. Abondamment illustré par plus de 300 figures et photos originales, ce livre est organisé en trois sections : les méthodes séparatives (les différentes techniques de chromatographie et d'électrophorèse), les méthodes spectrométriques (UV, IR et Raman, fluorimétrie, fluorescence X, absorption et émission atomique, RMN), et les autres méthodes (spectrométrie de masse, analyses isotopiques et méthodes de marquage, analyseurs spécifiques, électrochimie). Dans cette nouvelle édition, le cours a été entièrement mis à jour pour tenir compte des progrès technologiques les plus récents (chromatographies, spectrométries, RMN...). Des exercices corrigés ont également été ajoutés.

Download or read book Analysis with Supercritical Fluids written by Bernd Wenclawiak and published by . This book was released on 1992-11-03 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: The editor has brought together in a compact and readable form the new methods of analytical chemistry using supercritical fluids. The volume provides comprehensive treatment of supercritical fluid chromatography (SFC) and supercritical fluid extraction (SFE); it discusses both theory and practice. The contributions are written by leading experts in their fields with exhaustive practical experience in SFC and SFE. Special attention is given to the description of applications and thus provides the experienced analyst with invaluable information widely scattered in the literature and helps the novice to adopt these new techniques quickly in his laboratory. An addendum includes brand new literature on SFC and SFE.

Download or read book Analyse chimique written by Francis Rouessac and published by . This book was released on 2000 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage offre un panorama très détaillé des méthodes actuelles d'analyse présentes dans des secteurs aussi variés que les industries chimiques, agroalimentaires, les laboratoires d'analyse médicale, les sciences de l'environnement. Le principe adopté est de relier les aspects pratiques de chaque méthode étudiée aux notions scientifiques qui l'expliquent. Abondamment illustré par plus de 250 figures et photos originales, ce livre est organisé en trois sections : les méthodes séparatives (les différentes techniques de chromatographie et d'électrophorèse), les méthodes d'analyse spectrale (RMN, IR, UV, fluorimétrie, fluorescence X, absorption et émission atomique), les autres méthodes (spectrométrie de masse, méthodes avec marquage, électrochimie). Quelques notions sur les statistiques et sur la préparation des échantillons sont données en complément. Dans cette nouvelle édition, le texte a été entièrement réécrit et mis à jour pour tenir compte des progrès technologiques les plus récents. Un chapitre a été ajouté, consacré aux méthodes d'analyse des éléments. En fin d'ouvrage, une liste de sites internet invite le lecteur à découvrir des démonstrations de matériels présentés dans le livre. Ce livre s'adresse aux étudiants des 1ers cycles universitaires (DEUG, DEUST, DUT) et de pharmacie. Il sera aussi utile aux étudiants des deuxièmes cycles orientés vers les sciences de la matière et aux personnels des laboratoires et des entreprises confrontés à tous niveaux à des problèmes d'analyse.