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ASAP 2460 Data Presentation

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Click here for a quick demonstration of the Interactive Data Selection Capability
 

Innovative MicroActive Software

Micromeritics’ innovative MicroActive software allows users to interactively evaluate isotherm data from Micromeritics ASAP, TriStar, and Gemini gas adsorption instruments. Users can easily include or exclude data, fitting the desired range of experimentally acquired data points using interactive, movable calculation bars. Isotherms can be viewed on either a linear or logarithmic scale, available to the user under each calculation model. No need to generate reports to review results.

Data Reduction Benefits

  • Interaction with adsorption data is direct. By simply moving the calculation bars, the user is immediately updated with new textual properties. One-click access to important parameters allows the user to focus on the result rather than the parameters.
  • Interactive data manipulation minimizes the use of dialog boxes and tunneling of dialogs to specify calculation parameters. This allows the user to accurately and efficiently determine surface area and porosity of their materials.
  • Improved ability to overlay files (up to 25) including mercury intrusion data with single-click file add and subtract feature.
  • User selectable data ranges through the graphic interface allow direct modeling for BET, t-plot, Langmuir, DFT interpretation, and much more.
  • Report Options editor allows the user to define up to five reports with on-screen previews. Each report has the ability to possess one summary, tabular, and graphical information pane.

Calculations, such as the BET surface area transform plot, can be easily generated and adjusted. The selection bars allow for a range of data points to be quickly and easily selected. As a result, the summary of values derived from the calculations is instantly updated. Within the calculation window(s), the range of data used can be further refined.

The pressure table allows data points to be taken in small increments of pressure, quantity dosed, or both

Method wizards
Both novice and experienced users can easily create methods. Methods corresponding to published ASTM test methods are included for various materials.

The pressure table allows data points to be taken in small increments of pressure, quantity dosed, or both

ASAP 2460 Interactive Reports include:

  • Isotherm
  • BET Surface Area
  • Langmuir Surface Area
  • t-Plot
  • Alpha-S Method
  • BJH Adsorption and Desorption
  • Dollimore-Heal Adsorption and Desorption
  • Horvath-Kawazoe
  • MP-Method
  • DFT Pore Size and Surface Energy
  • Dubinin-Radushkevich
  • Dubinin-Astakhov
  • Summary
  • User-Defined Reports

 

NLDFT  Modeling
The NLDFT Advanced PSD, Dual DFT modeling allows the user to combine the information gathered from nitrogen and carbon dioxide isotherms to deliver a full pore size distribution on materials (such as carbon slit pores) where pores of molecular sizes are present. The range of pore size analysis in this method is extended to smaller pore sizes compared to the standard nitrogen analysis. This is due to the fact that CO2 can access some very small micropores that are not accessible to N2 at cryogenic temperatures because of size restrictions.

Click on image for larger view

This advanced NLDFT method allows users to determine the pore size distribution of their sample using two isotherms. In this example CO2 adsorption (red) at 273 K and nitrogen adsorption (green) at 77 K are used to calculate a single pore size distribution. Users do not have to cut and paste distributions from CO2 and nitrogen – a single distribution is determined using both isotherms.

 

Mercury Porosimetry/Gas Adsorption Overlay
MicroActive for the ASAP 2460 software also includes a powerful utility that allows the user to overlay a mercury porosimetry pore size distribution with a pore size distribution calculated from gas adsorption isotherms. This new import function allows users to rapidly view micropore, mesopore, and macropore distributions in one easy-to-use application.

 

Integrated Python Programming Language
The Python programming language has been integrated within MicroActive. This scripting language allows users to develop extensions to the standard report library available within the ASAP 2460 application permitting customizable report functionality for review of data and or presentation. Several example scripts are available from Micromeritics.

New Dosing Options
Dosing options added to the pressure table give the user the ability to change the pressure increment, volume dose increment, and equilibration interval time between data points. A detailed isotherm can be collected by specifying that a data point be recorded after a certain amount of gas is dosed, increasing the relative pressure by a small amount, or both. This permits a higher level of accurate dosing of very low partial pressures resulting in improved resolution in the isotherm data.

 
The pressure table allows data points to be taken in small increments of pressure, quantity dosed, or both.