Combines the best in microbalance, gas flow and vapour measurement technologies to deliver unsurpassed performance in terms of experimental design as well as instrument accuracy and repeatability
DVS Advantage is the latest dynamic vapour sorption analyser from Surface Measurement Systems.
The company says the Advantage combines the best in microbalance, gas flow and vapour measurement technologies to deliver unsurpassed performance in terms of experimental design as well as instrument accuracy and repeatability.
The Advantage uses a dry carrier gas, usually air or nitrogen, and the user can select from either of two vapours at any one time, with the potential of performing competitive sorption studies.
Precise control of the ratio of saturated and dry carrier gas flows is enabled with mass flow control combined with the use of unique real time vapour concentration monitoring for both water and organics.
The vapour of known concentrations then flows over a sample suspended from a recording ultra-microbalance, which measures the weight change caused by adsorption or de-sorption of the vapour molecule.
It is these dynamic conditions that enable the adsorption/desorption process to be so rapid.
The sample may be pre-heated if desired as a further experimental option, and which in some cases may speed up the analysis cycle time as in the case of bulk absorption or drying inorganic hydrates.
This heating can be as a single step, or at a controlled ramp.
The temperature of the whole system is user selectable and precisely controlled under closed loop conditions to ensure that the solute vapour pressure at the sample is constant.
Isolation valves at the solvent reservoirs ensure there is no solute contamination of the sample area when p/p0 of zero is requested, ensuring that a true p/p0 zero is always obtained.
The sensitivity and precision of DVS Advantage enables the use of very small samples (typically 1-30mg) thus allowing equilibrium to be reached even more quickly, says SMS.
The instrument is programmable and fully controlled by DVSWin software through a smart operator interface that meets the highest standards of data integrity and security.
A full suite of data analysis modules running under Excel allow one-click calculations and reports to be generated.
