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Why DAI Alumina   

The Alumina Advantage

Alumina has proven to be the most effective sorbent available.

Alumina, by being amphoteric (acting either as a base or an acid as well as being configured as neutral) provides the chromatographer the ability to separate a multitude of compounds over and above silica gels. Alumina can act as a weak ion exchanger demonstrating anionic or cationic properties, while additionally acting as an adsorbent. Alumina, due to its unique biological characteristics, is a special adsorbent for use in separation sciences.

Alumina vs. Silica Gel

Superior Adsorption
Silica Gel
Standard Adsorption

30 Parameters for Selectivity

A. 3 pH ranges: acid, basic, and neutral
B. 2 surfaces areas for standard Chromatography…Alumina: 150 m2/gm and 200 m2/gm
C. 5 Brockman activity ranges: I, II, III, IV, V

Parameters for Selectivity

A. pH ranges 6.5 to 7.5 Limited range
B. 2 Brockman activity ranges: I and II

Not in the equation are the different pore diameters that can be produced for both
Alumina and Silica Gel

40 Ĺ, 60 Ĺ, 100 Ĺ, and up to 1000 Ĺ

The DAI Advantage

DAI's alumina are superior to other aluminas on the market.

The DAI team wrote the book when it comes to alumina. Literally, not figuratively. For over 25 years innovations by the DAI team have played a major role in the exponential growth of the use of alumina for separation technologies.

DAI’s Alumina is at the forefront of Separation Technology. A major reason for the exponential growth in the use of alumina for chromatography has been our contribution to standardizing the manufacturing process. Our efforts have resulted in standardized grades of alumina having well controlled and defined:


  1. Constant Deactivation behavior

  2. Controlled Chromatographic Parameters

  3. Controlled Surface Area

  4. Controlled Porosity

  5. Ability to customize for specific applications

Dynamic Adsorbents is the only company offering a full range of alumina products that are superior to anything in the marketplace and can handle a much wider range of applications.

Advantages include:

  • Greater capacity and effectiveness
  • Unique but trend setting in establishing the manufacturing and criteria in alumina grading
  • Customized applications
  • Quality Control - DAI controls the full manufacturing process

    Adsorbents, Inc. Aluminas are manufactured and Quality Assured providing world class Laboratory and Pilot Process chromatographic materials. We control the manufacturing process from raw material to finished product, unique in our industry.

    We carefully control the physical characteristics of pore size, surface area, particle size and surface chemistry to ensure reproducible optimized chromatographic behavior for:

    k' - uniform capacity • - reproducible selectivity
    RS- improved resolution
    N - excellent performance

    Careful attention is paid to quality control procedures reproducible performance regardless of the technique used, especially when transferring from one technique to another.

  • Dryspheres® optimize dessicant performance and dehydrates gas or liquid in a way that no other product can offer but also removes other types of contaminants.
  • Dynamic Adsorbents Inc. (DAI) has formulated a specialty proprietary adsorbent (Alumina C) allowing PCBs to be removed safely from contaminated sites, offering several advantages over alternative methods. More info

  • Dynamic Adsorbents, Inc. Aluminas are unique products; e.g., Super I, Std Act I, etc: High activity Alumina is useful for eluting polar samples in nonpolar solvents, and for the purification of solvents. Lower activities of Alumina can readily be obtained by the addition of polar media, especially water. Thus, each problem can be resolved via the adjustment of the sorption system, as required for each problem.

  • Super activity I aluminas are unique as DAI's products; they demonstrate approximately twice the capacity as compared to Standard activity l;

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