The ASAP 2050 uses two independent vacuum systems, one for sample analysis and one for sample preparation. This allows preparation and analysis to proceed concurrently without the inherent delay found in single vacuum system analyzers that must share a pump. Moreover, independent systems completely eliminate the possibility of cross-contamination between the degas and analysis manifolds.
A two-station intelligent degas system provides fully automated degassing with controlled heating time profiles. Temperatures at each degas port, and the rate of temperature change, can be set and monitored individually. The temperature can be controlled from a few degrees above ambient to 450 ºC. A sample may be added to or removed from a degas port without disturbing the treatment of the other sample. The degas treatment information is saved as part of the sample file, included in analysis reports, and can be conveniently copied and reused for other samples to ensure repeatability and reproducibility.
Stainless-steel, temperature-monitored analysis manifolds are designed for optimal internal volumes and superior vacuum performance. These optimized manifolds, in combination with temperature monitoring, ensure highly accurate measurements of sorbed gas volumes. Analysis manifolds are capable of operating from vacuum to 10 atmospheres. This allows a rapid collection of isotherms.
An optional chiller Dewar and recirculating bath allow the ASAP 2050 to be operated indefinitely. The instrument also supports the use of a standard Dewar with cryogen that will provide at least 50 hours of unattended analysis without refilling the Dewar. Micromeritics’ patented Isothermal Jackets can be used to assure a constant thermal profile along the full length of both the sample and saturation pressure (P0) tubes throughout extended analyses.
Straight-walled, stainless-steel sample tubes enable extended pressure analyses and are capable of safe operation up to 150 psia (10 atmospheres).
The ASAP 2050 features a single high-quality, stable, low-noise transducer system for all measurements. This eliminates the possibility of progressive offset and drift between separate transducers covering the same range.
Special degas heating mantles can be used to prepare samples in situ on the analysis port prior to analysis. The new heating mantle is designed to allow the user to place the mantle on the sample tube without removing the Dewar.
ASAP Reference Materials
Lanthanum Penta-Nickel (LaNi5)
is a well-known alloy that readily forms hydrides. This reference material is recommended for use with the ASAP 2050 to demonstrate the formation and characterization of hydrides. This material is ideally suited for use with the pressure composition isotherm report.
is a typical porous, high surface area reference material. The surface area of the silica-alumina typically exceeds 200 m2/g and the pore size is a nominal 100 Å. This material is recommended for users who analyze amorphous materials with surface area ranging from 10 to greater than 300 m2/g for both non-porous and porous materials in the 40 - 3000 Å range. Silica-alumina is suitable for use with BET, t-plot, and BJH pore size reports.
Standard Reference Blacks are available from 20 to greater than 100 m2/g and are stable, well-characterized materials. They are recommended for all users but may be especially suited for researchers in the carbon, tire, and filler industries. Carbon black reference materials are suitable for use with BET and STSA reports.
A 5 m2/g glass reference material is recommended for industries and users who characterize materials in the 1 through 50 m2/g range. Glass reference material is suitable for use with BET surface area reports.