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General| Type | Gas Adsorption Analyzer |
|---|---|
| Measurement Principle | Gas Adsorption |
| Analysis Method | Static volumetric |
| Pore Size Range | 3.5 Å to 5000 Å |
| Pore Size Range (Angstroms) | 3.5 to 5000 |
| Communication Interface | Ethernet |
| Power Requirements | 100-240 VAC, 50/60 Hz |
| Measurement Technique | Nitrogen adsorption at 77 K (liquid nitrogen temperature) |
| Analysis Ports | 3 |
| Adsorptive Gases | N2, Ar, CO2 |
| Pressure Transducer Accuracy | 0.1% of reading |
| Data Output | Reports, graphs, and data files |
| Data Reduction Methods | BET, Langmuir, DFT |
Overview of the TriStar II Plus Surface Area and Porosity Analyzer.
Explanation of symbols used for safety precautions and supplemental information.
Details on available optional hardware and system enhancements for the analyzer.
Specifications for gases required for analysis, including purity levels.
Information on the cryogenic liquid required for sample cooling during analysis.
Detailed technical specifications for the TriStar II Plus analyzer's performance.
Description of components located on the front panel of the analyzer.
Description of components located on the side panel of the analyzer.
Description of components located on the rear panel of the analyzer.
Details on available optional hardware and system enhancements for the analyzer.
Specifications for gases required for analysis, including purity levels.
Information on the cryogenic liquid required for sample cooling during analysis.
Specifications related to pressure measurement capabilities of the analyzer.
Specifications detailing the analysis parameters and performance of the analyzer.
Details on gases that can be used as adsorbents in the analyzer.
Specifications for the manifold temperature control and accuracy.
Specifications detailing the vacuum system's performance and requirements.
Environmental operating conditions and limitations for the analyzer.
Physical dimensions and weight of the analyzer unit.
Electrical power and frequency requirements for the analyzer.
Specifications for the computer system required to operate the analyzer software.
Information on using the software in 21 CFR Part 11 compliant environments.
Description of the main menu bar options and their functions within the software.
Explanation of common fields and buttons used throughout the analyzer application.
Details on file status, descriptions, and location within the File Selector window.
List of file types and their corresponding file name extensions used by the software.
File formats supported for printing and exporting data from the application.
List of keyboard shortcuts for activating menu commands and functions.
How to change sample and parameter file display options: Advanced, Basic, or Restricted.
How to locate and manage analyzer files stored in libraries within the File Selector.
How methods define sample identification and parameter templates for analysis.
Configuring gas inlets and analyzer unit settings.
Specifying how data appears in application windows and reports.
Displaying instrument status through various gauges on the dashboard.
Viewing a log of recent analyses, calibrations, errors, and messages.
Displaying an analyzer schematic to visualize and operate valves and elevator.
Converting StarDriver files (.MGD) to sample files (.SMP).
Option to print or export file contents to various formats like PDF, TXT, XML, or XLS.
Creating a list of sample file information including name, date, and status.
Steps for uninstalling the analyzer software from the system.
Information on how to obtain and install the latest software version.
Requirements and considerations for using software in 21 CFR Part 11 environments.
Defines user roles (Developer, Analyst) and their permissions within the software.
How to change view options (Advanced/Basic) for Developers and Analysts in 21CFR11.
Lists user login attempts and changes made to sample files for auditing.
Procedure to uninstall software in 21 CFR Part 11 compliant environments.
Step-by-step guide on creating new sample files for analysis.
Procedure for opening and working with existing sample files.
Methods for manually entering pressure data into a sample file.
Rules and process for importing isotherm data from external ASCII text files.
List of file types used for analysis parameters (e.g., Adsorptive Properties, Analysis Conditions).
Defining adsorptive gas characteristics for analysis.
Specifying parameters to guide an analysis, including pressure and gas settings.
Settings for automatic sample degassing procedures using Smart VacPrep.
Specifying report details like axis scales, headings, plots, and advanced reports.
Specifying information about the sample tube used for analysis.
Instructions for degassing samples using the Smart VacPrep unit.
Procedure for safely transferring a degassed sample tube to the analysis port.
Safety precautions when handling Dewars and cryogenic liquids.
Recommended tasks and materials needed for cleaning and preparing sample tubes.
Detailed procedures for cleaning and labeling sample tubes and filler rods.
Instructions for creating a sample file necessary before starting an analysis.
Procedures for accurately weighing the sample for analysis results.
Steps to degas the sample after weighing to remove contaminants.
Steps for installing sample tubes into the analysis ports.
Instructions for filling the Dewar with analysis bath liquid and installing it.
Guidelines for performing surface area analyses using Krypton gas.
Automated analysis of up to three samples with identical conditions.
Procedure for performing an analysis with different conditions or report options.
Measuring and calculating free space for sample tubes used in analysis.
Procedure for performing an empty tube analysis for volume correction.
Procedure for performing analysis using a reference material for calibration.
Initiating the generation of reports for sample analysis data.
Closing all currently open reports.
Generating a report on isosteric heat of adsorption for surface heterogeneity.
Generating reports with Statistical Process Control (SPC) options.
Generating SPC regression reports to determine interdependencies between variables.
Generating SPC control chart reports to plot statistical changes.
Investigating and manipulating analysis data using various reporting methods.
Enabling interactive reporting with linear and log plots of analysis data.
Methods for evaluating the merit of reported information and identifying experimental error.
Customizing and manipulating reports using toolbar, menus, zoom, and axis features.
Shortcuts for displaying and modifying tabular report content and appearance.
Shortcuts for editing graph properties like axes, scales, and curves.
Overlaying different graph types or multiple sample graphs for comparison.
Methods to import and overlay pore size distribution data into interactive graphs.
Example of a generated BET report showing calculated surface area and related parameters.
Example of a BET surface area plot illustrating results.
Example of a BJH adsorptive cumulative pore volume plot.
Example of a BJH desorption cumulative pore volume plot.
Example of an isotherm plot displayed in a linear scale.
Example of an isotherm plot displayed on a logarithmic scale.
Example of a T-plot report for quantitative analysis of pore area and volume.
Using Python scripts to create custom summary, tabular, and graphical reports.
Steps to create advanced reports using Python scripts with custom functions.
Converting adsorption isotherms to dimensionless isotherms using relative pressure of 0.4.
Configuring BET calculation for sample surface area, including pressure ranges.
Determining mesopore volume/area distribution from adsorption and desorption data.
Generating pore size distribution analyses using non-local DFT models.
Generating surface energy distribution analyses results.
Generating reports from Dollimore-Heal adsorption and desorption data.
Applying the Dubinin method for pore volume distributions in microporous materials.
Normalizing measured isotherms using a reference isotherm for f-ratio analysis.
Modeling low pressure adsorption data and micropore isotherms using Freundlich theory.
Plotting individual peaks for different pore sizes using the Horvath-Kawazoe method.
Indicating adsorption and desorption of gas at constant temperature.
Determining sample surface area by relating it to monolayer gas adsorption.
Providing pore volume distributions for microporous materials using user-selected thickness curves.
Advanced computation of pore size distribution using two analyses and non-local DFT models.
Lists the conditions used to perform the analysis, such as adsorptive properties and analysis conditions.
Lists all changes and comments applied to sample files with Complete status (21CFR11 only).
Provides a condensed summary of selected data results for physisorption analyses.
Quantitative analysis of area and total volume ascribed to micropores using the t-plot calculation.
Modeling adsorption data where heat of adsorption drops linearly with increasing coverage.
Checking if analysis results are within typical ranges and providing corrective action suggestions.
Displaying calibrated readings of all sensors in the system.
Initiating diagnostic tests for gas lines, system verification, or requested by service.
Procedure to evacuate and zero pressure transducers, then match them to the manifold.
Evacuating and zeroing pressure transducers, performed by qualified service personnel.
Calibrating the servo valve to the sample transducer, recalibrating after pressure calibration.
Saving current calibration settings to a backup file for later reloading.
Loading previously saved calibration files to restore settings.
Identifies common causes for operational issues like leaks, weighing errors, and gas supply.
Diagnosing and resolving issues with the analyzer's elevator function.
Addressing noise issues with the elevator screw, potentially requiring lubrication.
Diagnosing issues when sample results are not within specifications, often due to manifold leaks or gas contamination.
Resolving issues where valves cannot be operated, often related to loose cables.
Diagnosing noise issues with the vacuum pump, potentially related to loose connectors or O-rings.
Correct sequence for powering on the analyzer, computer, and peripherals.
Procedure for safely powering off the analyzer and associated equipment.
Recommendations for connecting gas cylinders, regulators, and lines to ensure purity and safety.
Procedure for replacing a depleted gas cylinder, including safety precautions.
Steps for safely disconnecting a depleted gas cylinder from the regulator.
Procedure for attaching and leak-checking a new gas cylinder and regulator connection.
Test to clean gas lines and verify no leaks from cylinder to analyzer.
Enabling manual control of system valves and pump components via the analyzer schematic.
Procedure for performing a leak test to determine if there is a system leak.
Recommended preventive maintenance procedures and frequencies for analyzer components.
Procedure for checking and cleaning the Dewar to prevent ice accumulation and blockage.
Instructions for cleaning the analyzer casing using approved cleaning solutions.
Procedure for cleaning gas delivery tubes to remove sample particles.
Lubrication instructions for the elevator screw if vibration or noise occurs.
Procedure for replacing a frit in the sample port connecting nut.
Procedure for replacing the O-ring on the sample tube stem to maintain a vacuum-tight seal.
Procedure for recovering data and restarting analysis after a power failure.
Creating summary reports using mic.summary call.
Creating tabular reports using mic.table call.
Creating graphical reports using mic.graph call.
Steps to create advanced reports using Python scripts with custom functions.
Running, removing, and editing Python scripts for advanced reports.
Examples of Python scripts for generating graphic, summary, and tabular reports.
Script to get adsorption isotherm and basic sample information using mic module calls.
Script to access report results for t-plot and BET reports using mic.report call.
Script to obtain overlay sample data using mic.overlay and mic.report calls.
Steps to enable overlay data usage in Advanced reports by selecting files and checkboxes.
Available Python calls for creating tabular reports, adding columns, and adding tables.
Script to add a table to the last created tabular report.
Script to add a column to the last created table with header, values, and alignment.
Calls for adding summary sections and creating new summary reports.
Script to create a new summary report with a specified title.
Calls for adding curves to graphical reports, specifying line styles, markers, and colors.
Script to add a curve to a graphical report with various customization options.
Script to create a new graphical report with specified labels, scales, and ranges.
Script to retrieve isotherm data, including pressure, quantity adsorbed, and sample mass.
Script to retrieve adsorptive data like cross-sectional area and molecular weight.
Script to retrieve specific sample information items like mass or description.
Script to access report results for t-plot and BET reports using mic.report call.
Script to retrieve imported pore data, including pore dimensions and volumes.
Methods modeling adsorption systems via forces between molecules, based on statistical thermodynamics.
Simulation technique for determining system equilibrium distribution using random particle selection.
Simulation technique calculating particle positions and velocities to determine gas adsorption.
Alternative theory for modeling adsorption, relating isotherms to microscopic system properties.
List of non-local density functional theory models for pore size analysis.
Classical approaches to evaluate surface energy and pore size distribution.
Using classical theories to extract adsorptive potential distribution.
Characterizing mesopore size distribution using Kelvin equation and correlating functions.
List of models based on Kelvin equation and thickness curves for pore size calculation.
Kernel function calculation using the Broekhoff-de Boer equation for pore size analysis.
List of papers providing additional information on Density Functional Theory (DFT) models.
Procedure for determining free space by evacuating and measuring helium pressure.
Rapid method for compensating for free space by using blank analysis data.
Method for entering pre-determined ambient and analysis free space values.
Recommendation to use metal gas lines only, avoiding plastic or rubber lines.
Methods (Purge, Evacuation) for removing trapped air from regulator and gas lines.
Preferred method for removing trapped air from gas lines and regulator.
Method for removing trapped air from regulator lines, requiring tank within 10 feet of instrument.
Recording sample mass before degas, after degas, and after analysis.
Recording degas apparatus, temperature, time, and notes.
Example of sample information fields in exported data, including method, sample, operator, mass.
Example of Psat vs. Temperature data table in exported results.
Example of report options and summary data within exported results.
Example of other report parameters like Freundlich, Temkin, and DFT in exported data.
Example of MP-Method parameters like surface area and pore volume in exported data.
Example of pass/fail criteria and range messages in exported data.
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