• Activity (according to Brockmann):
      Super Activity I
      Standard (Std) Activity I-IV
• pH: Acid(A) Basic(B) Neutral(N)
• Stepless Deactivation behavior
• Constant Deactivation behavior
• Controlled Chromatographic Parameters
• Controlled Surface Area, Porosity

Scientific Adsorbents' Aluminas
Analytical, Prep LC, Sample Processing

Super I
Super Activity I Aluminas are as unique as SAI's products. They demonstrate approximately twice the capacity as compared to Standard Activity I. Surface modifications available are "A" (Acid), "B" (Basic), and "N" (Neutral). Super Activity I Aluminas constitute the starting material for the Scientific Adsorbent's line of Aluminas. Therefore, it is easy to change between various modes of chromatography. A special feature of Super Activity I is absolutely constant deactivation behavior which is valid for the deactivation process as well as when in contact with the chromatographic solvent.

Standard Activity I
Alumina Standard Activity I (Act I) is available with various surface modifications, A, B, and N to facilitate the separation of a wide range of compounds. In addition to pH, the activity of the surface of Alumina can mediate the separation. It is simple to adjust the activity by adjusting the water content of the material. (Alternatively, other polar media can replace the water.)

• Use high activity Alumina (Std Act I, Super Act I) for the separation of polar samples in nonpolar solvent systems... and for the purification of solvents

• Use lower activity Alumina for less polar samples

  CAT#	Description
  02159-05	ALUMINA A, ACT I, 50-200u, 500g
  02159-1	ALUMINA A, ACT I, 50-200u, 1kg
  02159-5	ALUMINA A, ACT I, 50-200u, 5kg
  02159-50	ALUMINA A, ACT I, 50-200u, 50kg
  02078-05	ALUMINA B, ACT I, 50-200u, 500g
  02078-1	ALUMINA B, ACT I, 50-200u, 1kg
  02078-5	ALUMINA B, ACT I, 50-200u, 5kg
  02078-50	ALUMINA B, ACT I, 50-200u, 50kg
  02135-05	ALUMINA N, ACT I, 50-200u, 500g
  02135-1	ALUMINA N, ACT I, 50-200u, 1kg
  02135-5	ALUMINA N, ACT I, 50-200u, 5kg
  02135-50	ALUMINA N, ACT I, 50-200u, 50 kg

DCC Alumina
DCC - Dry Column Chromatography is a versatile Prep LC method that bridges the gap between analytical TLC and preparative column chromatography.  See Silica DCC for detailed procedure.

"Flash" Alumina
Flash Chromatography is a rapid Prep LC technique that facilitates the separation of 0.1 - 10 g of material via simple economical laboratory protocols.

Activity II, III
Alumina II - III sorbents are economical adsorbents of medium activity. Use this material for general purpose scouting and in cases where the use of carbon black is precluded due to its organic nature. Also, use Alumina II - III as a replacement for organic/polymeric ion exchangers, especially when it is necessary to overcome temperature and radiation cleavage problems.

Alumina for HPLC
The following Catalog #s are recommended:

Alumina Oxides for Thin-Layer Chromatography
The following Catalog #s are recommended:

Deactivation Protocols

Introduction
SAI's Aluminas are unique products, i.e. Super I, Std Act I, etc. High activity Alumina can be used for 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 discretely resolved via the adjustment of each sorption system.

Special Features
Super I Aluminas show an approximate double capacity as compared to Activity I. Super I does not have to be deactivated in steps. By following the appropriate deactivation curves, deactivation can be achieved in minute increments.

Deactivation behavior
By following the procedures below, it is relatively easy to obtain the desired activity.

Deactivation Procedure(s)
The % water addition shown above is based upon weight / weight relationships; these relationships are critical and any deviation will/could result in obtaining improper activities.

To reproduce the desired activity, weigh an appropriate amount of Alumina into a glass bottle. Add the appropriate weight of water to the Alumina and close the bottle with a stopper. For example, 97 g of Alumina + 3 g H₂O = 3% water addition.

Shake well until all lumps disappear. Wait until the mixture has cooled to room temperature. Keep the container closed so that equilibrium conditions remain constant.