Gravimetric Gas/Vapor Sorption Vacuum Analyzer - DVS Vacuum

DVS Vacuum Gravimetric Gas/Vapor Sorption Analyzer: Precision and Advanced Control for Material Analysis

Introduction to the DVS Vacuum Gravimetric Gas/Vapor Sorption Analyzer

The DVS Vacuum Gravimetric Gas/Vapor Sorption Analyzer represents the pinnacle of precision in material analysis. Designed to measure the kinetics and physisorption isotherms of various materials, including Zeolites, MOFs, COFs, Carbons, and composite materials, this instrument excels in single and multiple component gas/vapor sorption analysis, offering unmatched precision.

Temperature and Pressure Control and Precision

The DVS Vacuum allows precise control of temperature and pressure while recording changes in sample mass. Equipped with roughing and turbomolecular vacuum pumps, the system maintains thermal equilibrium throughout the vacuum chamber, including the sample, pressure transducers, gas/vapor delivery systems, and solvent flasks. This ensures smooth operation across the entire temperature range (10-70°C) without condensation risk.

Interference-Free Gas/Vapor Sorption Analysis

The system introduces water or organic solvent partial pressures under vacuum to minimize their impact on a material's structure. The analyzer measures true water or organic vapor sorption isotherms without unnecessary interference from a carrier gas. Additionally, it enables the study of pharmaceutical powder drying kinetics, considerably expanding the instrument's applications.

Long-Term Thermal Stability

Maintaining vapor generation and the delivery manifold at sample temperature, DVS Vacuum's innovative design prevents condensation problems common in other market instruments, ensuring long-term thermal stability.

High Precision Pressure Measurements

DVS Vacuum is the world's most advanced vacuum DVS device, enabling direct, gas-independent pressure measurements with high precision.

Reliable Precision Mass Measurements

With the unparalleled precision of Surface Measurement Systems' Ultrabalance at its core, DVS Vacuum features unmatched balance baseline stability over 24 hours, capable of measuring mass changes with 0.1 µg resolution and peak-to-peak noise less than or equal to 0.3 µg.

Measurement Capabilities

• In-situ sample degassing at temperatures up to 400°C and high vacuum (≤10⁻⁶ Torr).
• In-situ drying curves of pharmaceutical materials at various pressures and temperatures.
• Real-time adsorption/desorption kinetics.
• Adsorption/desorption isotherms (constant T, variable P).
• Adsorption/desorption isobars (variable T, constant P).
• 'Apparent' BET Surface Area (Brunauer, Emmett, and Teller).
• Diffusion coefficients.
• Heat of Adsorption.
• Dynamic Competitive Adsorption of two probe molecules (e.g., CO₂ – H₂O, Toluene – H₂O, MeOH – H₂O).
• Binary competitive adsorption of one probe molecule at constant loading of another probe molecule.
• Multiple adsorption/desorption cycles and sample regeneration.

DVS Vacuum Specifications

Temperature Control

• Temperature-controlled enclosure.
• Control range: 10°C to 70°C.
• Control accuracy: ±0.1°C.
• The enclosure also provides protection against condensation.

Weight Measurement

• High-resolution microbalance.
• Sample mass: between 1 and 1000 mg.
• Mass change: ±150 mg.
• Resolution (accuracy): 0.1 µg.
• Peak-to-peak noise: ≤ 0.3 µg.

Pressure Measurement

• 1000 Torr Baratron: full scale from 0.01 to 1000 Torr (standard).
• 10 Torr Baratron: full scale from 0.005 to 10 Torr (standard).
• Other ranges available upon request (100 and 500 Torr).
• Accuracy: ±0.5% of reading.
• Resolution: 0.01% of full scale.

Vacuum Pressure Measurement

• Vacuum pressure transducer: full scale from 1×10⁻⁸ Torr to 760 Torr.

Computer Hardware and Software

The system is fully automated and controlled by specifically developed software. Data can be analyzed in real-time using analysis software.

Discover More About DVS Vacuum

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