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DVS is now established as a useful analytical tool in many R&D laboratories throughout the world.
|Recent study on application of DVS technique in food industry:Application Note 62: Water Activity (Aw) Measurements Using a Payne Cell with a Flux-Calibrated Membrane and DVSThe measurement of water activity (Aw) is a very important metric in the food industry. It is used by food manufacturers and government agencies to evaluate the quality of food ingredients and to predict a product’s potential shelf life. The most widely used method to determine Aw is the measurement of water vapour pressure emanating from a food material enclosed in a sealed chamber. This application note demonstrates a possible alternative to the traditional method employed by industry and describes advantages that may be gained by this new procedure.
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Validation of humidity generation and measurement in gravimetric vapour sorption instrumentation is an important issue for the pharmaceutical and related industries. This application note sets out a standard DVS method for validation of relative humidity data using saturated salt solutions.
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Application Note 02: Moisture Sorption of EC Standard Reference Material RM 302 on a DVS-1 Instrument
Microcrystalline cellulose (RM 302) is a standard EC reference material for validation of the measurement of water sorption isotherms of food materials following the COST 90 procedure. This procedure involves the periodic weighing of samples stored over saturated salt solutions until equilibrium is established (nominally after 7 days).
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Application Note 10: Direct Visualization of Moisture Induced Morphological Transformations using a combination of DVS and in-situ Color Video Microscopy
This application note describes the integration of DVS with a colour video microscope for the in-situ visualisation of moisture induced morphological transformations, which may be correlated with the gravimetric data.
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Application Note 46: Combining Raman Spectroscopy with Gravimetric Vapor Sorption Analysis for Pharmaceutical Materials
Raman spectroscopy is a widely used physical characterization technique used in the pharmaceutical industry. The combination of Raman spectroscopy and Dynamic Vapour Sorption (DVS) allows for a more complete understanding of vapour-solid interactions for pharmaceutical materials as it relates to structural properties. This paper overviews the DVS-Raman capabilities and gives several examples.
Application Note 57: Characterization of Wheat Straw for Bio-fuel Application
Biomass, such as wheat straw is an abundant and inexpensive natural biopolymer rich in cellulose and hemicellulose which can be converted into bio fuel. The bio-fuel has been attracting attention due to the future potential shortages of fossil fuel. One of the crucial steps of producing bio ethanol from wheat straw is its pre-treatment which should facilitate the economic feasibility and yield efficient conversion into biofuel. This pre treatment is expected to increase the accessible chemical sites of the straw to increase convertibility in subsequent hydrolysis and fermentation steps. Dynamic Vapour Sorption and UV were used to assess the wheat straw pre-treatment and sugar yield, respectively.
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Application Note 104: Vapor Sorption Properties of Building Materials using Gravimetric Sorption Instrumentation – an Overview
Dynamic Vapour Sorption (DVS) has long been used for investigating the interaction of water and organic vapours with solid materials. The versatility and impact of DVS has particular importance in the study of building materials. This overview application note summarises several examples of using DVS to study cements, wood, insulation, and other building materials.
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