|The VSTAR™ vapor sorption analyzer goes beyond water sorption to provide vapor sorption analysis using a wide variety of organic vapors at a wide range of temperatures. Meticulous control of the manifold temperature from the vapor source to the sample eliminates the possibility of local condensation of the adsorptive and ensures the most accurate analysis possible. The VSTAR™ measures complete adsorption-desorption isotherms, that is the quantitative uptake of vapor as a function of relative pressure / relative humidity at a user selectable, thermostatically controlled temperature. Such measurements are of critical importance to material scientists developing adsorption based technologies for chemical process and environmental applications.|
Each VSTAR™ comes standard with a circulating bath, capable of controlling the sample temperature of one to four samples from –20°C to 100°C with a thermal stability of ±0.01°C. The low limit of the temperature range can be extended to –40°C and/or the precision of the control can be increased to ±0.005°C with optional circulators. Additional circulators can be added to allow completely independent temperature control of each sample in a multi-station system.
Superior manifold temperature control from the vapor source to the sample eliminates the possibility of local condensation of the adsorptive and ensures the highest accuracy.
Intuitive dialogs allow programming flexible degas protocols and defining all acquisition parameters, from point selection to analysis temperature. Predefined protocols can be saved and used on a series of samples to ensure uniform analysis.
Acquired data can be displayed and printed or copied into reports and other documents. Basic data processing routines such as BET surface area and Dubinin-Radushkevich are built into the basic software. Data can be exported to spreadsheets or VersaWin™ Quantachrome’s powerful physisorption data processing package for additional display and processing options.