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 sorbent
for use in separation
sciences.
Activity:
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
Super I
Super
Activity I Aluminas are unique as DAI's products; they
demonstrate
approximately twice the capacity as compared
to Standard Activity l;
Surface modifications available are "A"
(Acid), "B" (Basic), and "N"
(Neutral). Super Activity I Aluminas
constitute the starting material
for the Dynamic Adsorbents
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 valid
for
the deactivation process as well as when in contact with
the
chromatographic solvent.
Standard Activity I
Alumina Standard
Activity I is available with various surface
modifications 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 water)
•
Use high activity Alumina (Std Act I, Super Act l) for the
separation
of polar samples in nonpolar solvent systems
and for the purification
of solvents. (see next page)...
• Use lower activity Alumina for less
polar samples.
DCC
Alumina
DCC - Dry column chromatography is a versatile Prep
LC
method that bridges the gap between analytical TLC
and
preparative column chromatography. (Request DCC
Application
Guide)
‘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. (Request
“Flash”
Application Guide)
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 C
(for PCB Removal)
Alumina C is a chemically and physically
modified Alumina
for the analysis and removal of PCB’s. This material
will find
wide use and application in/for:
Analysis
Environmental Clean-Up
Solvent Purification
Electric
Utilities: Transformer Oil
Soil, Water Studies
(Request the
Alumina Environmental Product Bulletin for
other environmental
applications)
Alumina P for Pyrogen
Removal
This material was developed specifically for the removal
of
Pyrogens in solution. Pyrogens are typically
complex
carbohydrates which preferentially adsorb to Alumina P.
Ideal
for antibiotic production and other types of
bio-technology
products.
Alumina R
Alumina R is an Alumina
which is used for purifying,
separatiing, and product formulations in
the radio-active field;
used for the production of various generators
where one isotope
is retained while the other is eluted. Mainly its
improved
exchange properties and the constant elution behavior
will
contribute to its reliability.
Alumina for Dioxin Analysis
AL 5788
has been developed for doing dioxin analysis. It is a
50-200 micron
particle.
Alumina for Solvent
Purification
Alumina is an ideal media for many solvent
clean-up
applications.
ALUMINA
for Pilot and Process
Based on DAI's expertise, Aluminas can be
produced according
to customer’s specifications. They are used for
batch processes
as well as for production size chromatography. Please
request
information and technical assistance. |
DRYSPHERE™
Drysphere™ is new high
technology, Dust free, spherical
activated Alumina manufactured and
designed to optimize
desiccant performance.
Request the
Drysphere™
Product Bulletin.
AL 2000 - For Removal of Lead from
Water
AL 2000 is a large particle (+200 micron) specially
modified,
chemically treated Alumina that has been designed for
the
removal of metal ions, especially dissolved lead and
other
cations from water. Request the AL 2000 Product
Bulletin.
AL 2100 - Scavenger
Alumina for Process
Clean-up
Scavenger Activated Alumina is
used for process scale removal
of impurities. Its high macroporosity
improves diffusion rates
and the high surface area provides enhanced
capacity.
Typical
Applications
Removal of peroxides from hydrocarbons and
ethers
Peroxide adsorption from solvents for
ultraviolet
spectroscopy
Dehydration of organic solvents with
superactive
adsorbents
Removal of alcohol from chloroform
Purification of organic solvents for optical purposes
Purification
of hydrocarbons and silicone oil for
UV
spectroscopy
AL 2300 - For Bio-Mass Clean-up
AL
2300 is designed for removing bio-mass in nutraceutical or
natural
product purification.
AL 5000 for Removal of LEAD and other
Heavy
Metals from Water
AL 5000 is a +50 micron spheriodal Alumina
that can readily
remove Lead and other heavy metals from Water. Metal
Cation
selectivity is Fe III> Cr III> Al III> Pb> Ag II>
Zn II> Co II> Cd II.
AL 5005
for Decolorization
AL 5005 is a 50 micron spheroidal,
macroporous high surface
area, high performance Alumina for the removal
of color, dyes
and clean-up of water.
AL 5500 for Arsenic Removal from
Water
AL 5500 is a specific macropore designed for the removal
of
arsenic from water or air vapor. Ideal for run-off
water
contaminated with arsenic.
AL 5900 Activated Wide-Pore
Aluminas
Wide-Pore aluminas are available in various pore sizes
up to a
macropore of 1000Ĺ . Ideal for biotechnology,
environmental,
and petroleum
uses. |
