Dynamic vapor sorption (DVS) is a gravimetric technique that measures how quickly and how much of a solvent is absorbed by a sample: such as a dry powder absorbing water. It does this by varying the vapor concentration surrounding the sample and measuring the change in mass which this produces. Water vapor is most commonly used, but it is also possible to use a wide range of organic solvents.
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| - Dynamische Wasserdampfsorption (de)
- Dynamic vapor sorption (en)
- Gravimétrie d'adsorption de vapeur d'eau (fr)
- Sorção dinâmica de vapor (pt)
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| - Die Dynamische Wasserdampfsorption (englisch Dynamic Vapor Sorption, DVS) ist eine gravimetrische Messmethode, um die Sorption von Wasserdampf an Feststoff zu untersuchen. Daryl Williams entwickelte 1991 die Messmethode, bei der die Gewichtszu- und -abnahme eines Feststoffes nach Änderung der umgebenden Luftfeuchtigkeit mittels einer Mikrofeinwaage analysiert wird. Besonders die Zeitersparnis (10–100 mal schneller als geläufige Methoden) bei der Messung der Hygroskopizität sorgten für eine schnelle Durchsetzung dieser Methode in der pharmazeutischen Industrie. (de)
- La gravimétrie d'adsorption de vapeur d'eau (ou DVS pour Dynamic Vapour Sorption) est une méthode d'analyse gravimétrique qui permet de mesurer la variation de masse d'un échantillon en fonction de la pression de vapeur du solvant. (fr)
- Sorção Dinâmica de Vapor (em inglês Dynamic vapor sorption, DVS) é uma técnica gravimétrica que mede quão rápido e quanto solvente é adsorvido pela amostra: por exemplo, como o pó seco absorve a água. Realiza a medida variando a concentração de vapor circundante à amostra e medindo a alteração na sua massa.A análise com vapor de água é mais usual, mas com o DVS também é possível utilizar uma larga gama de solventes orgânicos. DVS foi originalmente desenvolvido para substituir os dessecadores com soluções saturadas que despendem tempo e trabalho intenso para medir isotermas de vapor de água. (pt)
- Dynamic vapor sorption (DVS) is a gravimetric technique that measures how quickly and how much of a solvent is absorbed by a sample: such as a dry powder absorbing water. It does this by varying the vapor concentration surrounding the sample and measuring the change in mass which this produces. Water vapor is most commonly used, but it is also possible to use a wide range of organic solvents. (en)
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| - Figure 1. Water vapor sorption kinetic and isotherm plot for microcrystalline cellulose at 25.0 °C. (en)
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| - Water Sorption Isotherms for Microcrystalline Cellulose Fig A.JPG (en)
- Water Sorption Isotherms for Microcrystalline Cellulose Fig B.JPG (en)
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| - Dynamic vapor sorption (DVS) is a gravimetric technique that measures how quickly and how much of a solvent is absorbed by a sample: such as a dry powder absorbing water. It does this by varying the vapor concentration surrounding the sample and measuring the change in mass which this produces. Water vapor is most commonly used, but it is also possible to use a wide range of organic solvents. Dr Daryl Williams, founder of Surface Measurement Systems Ltd, invented Dynamic Vapor Sorption in 1991 and the first instrument was delivered to Pfizer UK in 1992. DVS was originally developed to replace the time and labor-intensive desiccators and saturated salt solutions to measure water vapor sorption isotherms. (en)
- Die Dynamische Wasserdampfsorption (englisch Dynamic Vapor Sorption, DVS) ist eine gravimetrische Messmethode, um die Sorption von Wasserdampf an Feststoff zu untersuchen. Daryl Williams entwickelte 1991 die Messmethode, bei der die Gewichtszu- und -abnahme eines Feststoffes nach Änderung der umgebenden Luftfeuchtigkeit mittels einer Mikrofeinwaage analysiert wird. Besonders die Zeitersparnis (10–100 mal schneller als geläufige Methoden) bei der Messung der Hygroskopizität sorgten für eine schnelle Durchsetzung dieser Methode in der pharmazeutischen Industrie. (de)
- La gravimétrie d'adsorption de vapeur d'eau (ou DVS pour Dynamic Vapour Sorption) est une méthode d'analyse gravimétrique qui permet de mesurer la variation de masse d'un échantillon en fonction de la pression de vapeur du solvant. (fr)
- Sorção Dinâmica de Vapor (em inglês Dynamic vapor sorption, DVS) é uma técnica gravimétrica que mede quão rápido e quanto solvente é adsorvido pela amostra: por exemplo, como o pó seco absorve a água. Realiza a medida variando a concentração de vapor circundante à amostra e medindo a alteração na sua massa.A análise com vapor de água é mais usual, mas com o DVS também é possível utilizar uma larga gama de solventes orgânicos. DVS foi originalmente desenvolvido para substituir os dessecadores com soluções saturadas que despendem tempo e trabalho intenso para medir isotermas de vapor de água. (pt)
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