Description
Analytical Versatility With Superior Throughput
Surface area and porosity are important physical properties that influence the quality and utility of many materials and products. Therefore it is critically important that these characteristics be accurately determined and controlled. Likewise, knowledge of surface area and especially porosity often are important properties in understanding the formation, structure, and potential application of many natural materials.
High Performance and High Sample Throughput. The automated Micromeritics® ASAP® 2425 surface area and porosimetry system is designed to help busy laboratories expand their workflow while providing highly accurate and precise surface area and porosimetry data. High performance, versatile analysis, and sample preparation systems are included in the same instrument.
Features and Benefits:
- Fully automated analyses
- High throughput with six independent analysis stations
- Each analysis port has a dedicated analysis and Po pressure transducer
- Twelve independently controlled degas ports
- Evacuation rate precisely regulated by a servo valve
- BET surface area measurements in as little as 1 hour
- Dosing options of maximum volume increment or dosing over specified pressure ranges
- Entered or calculated analysis temperature
- Equilibration option allows user to specify equilibration times for different parts of the isotherm
- Low surface area option with five independent analysis ports
- With six independently operated analysis ports, a new analysis can begin as soon as another is finished. This provides an important advantage over many multiport instruments that require all samples to be prepared or analyzed at the same time.
- Long-duration Dewars and Micromeritics Isothermal Jackets1 assure a constant thermal profile along the length of both the sample and saturation pressure (Po) tubes throughout extended analyses. The Po value may be entered, or measured either continuously or at selected intervals.
- The high-capacity Dewar also allows unattended analysis of high-resolution adsorption/desorption isotherms that take much longer to complete because the system must equilibrate at each data point.
- BET surface area analyses utilizing six parallel runs can be achieved in as little as 1 hour.
- A low surface area option that uses krypton as an adsorptive to measure total surface areas of 0.5 m2 or less is available. This option utilizes five of the six available ports. It also features a turbomolecular drag pump, which provides the high vacuum required for krypton analyses, and a 10 mmHg pressure transducer, which allows accurate, repeatable pressure resolution.
- Intuitive Micromeritics MicroActive software combines user-defined reports with the ability to interactively evaluate isotherm data. User-selectable data ranges through the graphic interface allow direct modeling for BET, t-Plot, Langmuir, DFT interpretation, and new advanced NLDFT methods.
- Up to five different nonreactive adsorptives, plus an additional gas for free space, can be attached to the analyzer simultaneously.
- The servo pressure control regulates dosing and evacuation during analysis to reduce analysis time.
Sample Preparation System
- The ASAP 2425 system includes twelve automatically controlled sample preparation ports that operate independently. Samples may be added or removed from degas ports without disturbing the treatment of other samples undergoing preparation.
- The sample preparation system is fully automated with controlled heating time profiles. Temperature and ramp rate can be set and monitored individually and controlled from a few degrees above ambient to 450 °C. The temperature hold period may extend past the point when evacuation is completed.
- A programmable pressure threshold can suspend the temperature ramp if the outgassing pressure exceeds the limit specified, preventing destructive steaming or other undesired reactions with residual gasses and vapors.
Low Surface Area Measurement (Krypton) and Micropore Options
In addition to the standard ASAP 2425, low surface area krypton and micropore models are available.
Low surface area (krypton) model includes the addition of a 10 mmHg transducer and permits accurate
measurement of very low surface area materials (< 1 m2/g).
The micropore model includes the addition of a 1 mmHg transducer which extends the low pressure measurement capabilities and allows enhanced performance for characterizing microporous materials. The transducer also increases pressure resolution in the range necessary for micropore analysis.
