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SMS - Model Advantage Series -Dynamic Vapor Sorption
The DVS Advantage uses dry air or dry nitrogen as carrier gas. The user can select one of any two vapor sources, originating from liquid organic solvents or water held at the same temperature as the DVS. When the dry carrier gas passes through a solvent, it becomes saturated with the vapours of that solvent. Precise control of the ratio of saturated and dry gas flow is enabled with mass flow control combined with the use of unique real time vapour concentration monitoring. A known concentration of the selected vapour then flows over a sample suspended from a recording ultra-microbalance, which measures the change in weight caused by sorption or desorption of the vapour molecules. These dynamic flow conditions enable the adsorption/desorption processes to be so rapidly studied.
Example of DVS Applications:
- Moisture uptake behavior of food and natural materials
- Stability and caking of food ingredients
- Moisture diffusion into blister packaging systems
- Moisture sorption of hydrophobic pharmaceutical materials
- Surface energies and surface areas of powders using organic vapor probes
Key benefits are:
- Single finger access for fast sample loading
- High performance digital microbalance.
- Pre-heating of the sample up to 150 ºC
- Experimental temperatures from 5 ºC to 60 ºC
- Full digital control of sample pre-heater and analysis temperatures.
- Multiple vapor reservoirs for rapid change from water to organic solutes.
- Multi-component vapor capability option
- Unique-in-line transducer technology for measuring real time organic or water vapor concentrations.
- Near Infra-Red (NIR) and Raman fibre optic ready instruments
- DVS Color Video option with full data annotation of digital images
- Modular sample manifold
- Smart Windows operator interface with full 21CFR part 11 compliance
- Comprehensive data analysis macros and advanced macros with 21CFR part 11 compliance
- Optional comprehensive Isotherm software
- Second-generation organic leak sensor
- Dedicated worldwide applications and technical support